View source for Boeing Vertol CH-46 Sea Knight

{{Short description|Tandem transport helicopter designed by Vertol}}
{{Redirect|Sea Knight|the mythological creature also named sea knight|Zitiron}}
{{Use dmy dates|date=September 2019}}
{{Infobox aircraft
| name = CH-46 Sea Knight <br/> Model 107
| image = File:CH-46 Sea Knight Helicopter.jpg
| image_caption = A US Marine Corps CH-46 of [[HMM-364]] flies over [[Huntington Beach]], [[California]], in October 2011.
| aircraft_type = [[Transport helicopter]]
| national_origin = United States
| manufacturer = {{ubl|[[Piasecki Helicopter|Vertol Aircraft Corp.]]|[[Boeing Rotorcraft Systems|Boeing Vertol]]}}
| designer = 
| first_flight = 22 April 1958 (V-107)
| introduction = 1964
| retired = {{ubl|2004 (US Navy)|2015 (US Marine Corps)}}
| status = In limited service
| primary_user = [[United States Marine Corps]] (historical)<!--Limit one (1) primary user. Top 4 users listed in 'primary user' and 'more users' fields based on numbers in service.  See cited list in Operators section. -->
| more_users = {{ubl|[[United States Navy]] (historical)|[[Japan Self-Defense Forces]] (historical)}}<!-- Limit is THREE (3) in 'more users' field, four (4) total users with primary user. Please separate with <br />.-->
| produced = 1962{{ndash}}1971
| number_built = H-46: 524<ref name="CH-46_hist_USN"/>
| developed_into = [[Boeing CH-47 Chinook]]
| variants = 
}}

The '''Boeing Vertol CH-46 Sea Knight''' is an American medium-lift [[tandem rotors|tandem-rotor]] [[transport helicopter]] powered by twin [[turboshaft]] [[aircraft engine|engines]]. It was designed by [[Piasecki Helicopter|Vertol]] and manufactured by [[Boeing Helicopters|Boeing Vertol]] following Vertol's acquisition by [[Boeing]].

Development of the Sea Knight, which was originally designated by the firm as the '''Vertol Model 107''', commenced during 1956. It was envisioned as a successor to the first generation of rotorcraft, such as the [[Piasecki H-21|H-21]] "Flying Banana", that had been powered by [[Reciprocating engine|piston engines]]; in its place, the '''V-107''' made use of the emergent turboshaft engine. On 22 April 1958, the V-107 prototype performed its [[maiden flight]]. During June 1958, the US Army awarded a contract for the construction of ten production-standard aircraft, designated as the '''YHC-1A''', based on the V-107; this initial order was later cut down to three YHC-1As. During 1961, the [[United States Marine Corps|US Marine Corps]] (USMC), which had been studying its requirements for a medium-lift, twin-turbine cargo/troop assault helicopter, selected Boeing Vertol's '''Model 107M''' as the basis from which to manufacture a suitable rotorcraft to meet their needs. Known colloquially as the "Phrog" and formally as the "Sea Knight", it was operated across all US Marine Corps' operational environments between its introduction during the [[Vietnam War]] and its frontline retirement during 2014.

The Sea Knight was operated by the USMC to provide all-weather, day-or-night assault transport of combat troops, supplies and equipment until it was replaced by the [[MV-22 Osprey]] during the 2010s. The USMC also used the helicopter for [[combat support#United States Marine Corps|combat support]], [[search and rescue]] (SAR), [[CASEVAC|casualty evacuation]] and Tactical Recovery of Aircraft and Personnel (TRAP). The Sea Knight also functioned as the [[US Navy]]'s standard medium-lift [[utility helicopter]] prior to the type being phased out of service in favor of the [[MH-60S Knighthawk]] during the early 2000s. Several overseas operators acquired the rotorcraft as well. [[Canada]] operated the Sea Knight, designated as '''CH-113'''; the type was used predominantly in the SAR role until 2004. Other export customers for the type included [[Japan]], [[Sweden]], and [[Saudi Arabia]]. The commercial version of the rotorcraft is the '''BV 107-II''', commonly referred to simply as the "Vertol". The Sea Knight is an amphibious helicopter, able to land directly on calm water and float, but only for a few hours.

==Development==
===Origins===
During the 1940s and 1950s, American rotorcraft manufacturer [[Piasecki Helicopter]] emerged as a pioneering developer of [[Tandem rotors|tandem-rotor]] helicopters; perhaps the most famous of these being the piston-powered [[Piasecki H-21|H-21]] "Flying Banana", an early utility and transport helicopter. During 1955, Piasecki was officially renamed as Vertol Corporation (standing for [[VTOL|vertical take-off and landing]]); it was around this time that work commenced on the development of a new generation of tandem rotor helicopter. During 1956, the new design received the internal company designation of ''Vertol Model 107'', or simply ''V-107''; this rotorcraft differed from its predecessors by harnessing the newly developed [[turboshaft]] engine instead of piston-based counterparts. During that year, construction of a prototype, powered by a pair of [[Lycoming T53]] turboshaft engines, each one being capable of producing 877 shp (640&nbsp;kW), commenced.<ref name=Apostolo>Apostolo, Giorgio. "Boeing Vertol Model 107". ''The Illustrated Encyclopedia of Helicopters''. New York: Bonanza Books. 1984. {{ISBN|978-0-517-43935-7}}.</ref>

[[File:Boeing Vertol 107 demonstratie, Bestanddeelnr 912-7031.jpg|thumb|right|V-107 prototype in 1961]]
On 22 April 1958, the V-107 prototype performed its [[maiden flight]].<ref name=Donald_V-107/> In order to garner publicity for the newly developed rotorcraft, it was decided to use the prototype to conduct a series of publicised flight demonstrations during a tour across the United States and several overseas nations. During June 1958, it was announced that the U.S. Army had awarded a contract to Vertol for the construction of ten production-standard aircraft based on the V-107, which were designated ''YHC-1A''.<ref name="whirly">Spenser, Jay P. ''Whirlybirds, A History of the U.S. Helicopter Pioneers''. University of Washington Press, 1998. {{ISBN|0-295-97699-3}} {{page needed|date=July 2019}}</ref> However, this order was later decreased to three helicopters; according to aviation author Jay P. Spenser, the cutback had been enacted in order that the U.S. Army would be able to divert funds for the development of the rival ''V-114'' helicopter, which was also a turbine-powered tandem rotor design but substantially larger than the V-107.<ref name="whirly"/> All of the U.S. Army's three YHC-1As were powered by pairs of [[General Electric T58|GE-T-58]] engines. During August 1959, the first YHC-1A-model rotorcraft conducted its first flight; independently, it was shortly followed by the maiden flight of an improved model intended for the commercial and export markets, designated ''107-II''.<ref name="CH-46_hist_USN">[http://www.history.navy.mil/planes/ch46.htm CH-46 history page] {{webarchive |url=https://web.archive.org/web/20071203202119/http://www.history.navy.mil/planes/ch46.htm |date=3 December 2007}}. U.S. Navy, 16 November 2000.</ref>

During 1960, the [[United States Marine Corps|U.S. Marine Corps]] evolved a requirement for a medium-lift, twin-turbine troop/cargo assault helicopter to replace the various piston-engined types that were then in widespread use with the service.<ref name="vert_Tandom">"Tandem Twosome", ''Vertical Magazine'', February–March 2007.</ref> That same year, American aviation company [[Boeing]] acquired Vertol, after which the group was consequently renamed [[Boeing Helicopters|Boeing Vertol]].<ref name="whirly"/> Following a competition between several competing designs, during early 1961, it was announced that Boeing Vertol had been selected to manufacture its model 107M for the U.S. Marine Corps, where it was designated ''HRB-1''.<ref name="CH-46_hist_USN"/> During 1962, the [[United States Air Force|U.S. Air Force]] placed its own order for 12 ''XCH-46B Sea Knight'' helicopters, which used the ''XH-49A'' designation; however, the service later decided to cancel the order due to delays in its delivery; instead, the U.S. Air Force opted to procure the rival [[Sikorsky S-61R]] in its place.{{Citation needed|date=September 2022}}

Following the Sea Knight's first flight in August 1962, the military designation was changed to ''CH-46A''. During November 1964, the introduction of the Marines' CH-46A and the Navy's UH-46As commenced. The UH-46A variant was a modified version of the rotorcraft to perform the [[vertical replenishment]] mission.<ref name="CH-46_hist_USN"/> The CH-46A was equipped with a pair of T58-GE8-8B turboshaft engines, each being rated at 1,250 shp (930&nbsp;kW); these allowed the Sea Knight to carry up to 17 passengers or a maximum of 4,000 pounds (1,815&nbsp;kg) of cargo.<ref name="vect_CH-46"/>

===Further developments===
[[File:US Navy 030315-N-8497H-003 A CH-46 Sea Knight assigned to Helicopter Transport Squadron Eleven (CH-11) lifts cargo during a vertical replenishment (VERTREP).jpg|thumb|left|A CH-46D assigned to HC-11 lifts cargo during a [[Vertical replenishment|VERTREP]] mission with {{USS|Abraham Lincoln|CVN-72|6}}.]]
[[File:CH-46 Sea Knight on USS Saipan.jpg|thumb|CH-46 Sea Knight on {{USS|Saipan|LHA-2|6}}]]
[[File:Marine Transport Squadron 1 150403-M-TW696-166.jpg|thumb|Formation of HH-46E, used for search and rescue]]

During 1966, production of the improved ''CH-46D'' commenced with deliveries following shortly thereafter. This model featured various improvements, including modified [[rotor blade]]s and the adoption of more powerful T58-GE-10 turboshaft engines,<ref name="CH-46_hist_USN"/> rated at {{convert|1400|shp|kW|sigfig=3|abbr=on}} each. The increased power of these new engines allowed the CH-46D to carry an increased payload, such as up to 25 troops or a maximum of {{convert|7000|lb|kg|sigfig=3}} of cargo.<ref name="vect_CH-46"/> During late 1967, the improved model was introduced to the [[Vietnam War|Vietnam theater]], where it supplemented the U.S. Marine Corps' existing CH-46A fleet, which had proven to be relatively unreliable and problematic in service.<ref>Rottman and Hook 2007, p. 10.</ref> Along with the USMC's CH-46Ds, the U.S. Navy also acquired a small number of UH-46Ds for ship resupply purposes.<ref name="Eden">Eden, Paul, ed. "Boeing-Vertol H-46 Sea Knight", ''Encyclopedia of Modern Military Aircraft''. Amber Books, 2004. {{ISBN|1-904687-84-9}}.</ref> In addition, approximately 33 CH-46As were progressively re-manufactured to the CH-46D standard.<ref name="vect_CH-46"/>

Between 1968 and 1971, the U.S. Marine Corps received a number of CH-46F standard rotorcraft. This model retained the T58-GE-10 engines used on the CH-46D while featuring revised avionics and featured a number of other modifications. The CH-46F was the final production model of the type.<ref name="CH-46_hist_USN"/> During its service life, the Sea Knight received a variety of upgrades and modifications. Over time, the majority of the U.S. Marine Corps' Sea Knights were upgraded to the improved CH-46E standard. This model featured [[fiberglass]] rotor blades, reinforcement measures throughout the airframe, along with the refitting of further uprated T58-GE-16 engines, capable of producing {{convert|1870|shp|kW|sigfig=3|abbr=on}} each; in addition, several CH-46Es were modified to double their maximum fuel capacity.<ref name="vect_CH-46"/> Starting in the mid-1990s, the Dynamic Component Upgrade (DCU) programmes was enacted, focusing on the implementation of strengthened drive systems and modified rotor controls.{{Citation needed|date=April 2012}}

The commercial variant, the ''BV 107-II'', was first ordered by [[New York Airways]] during 1960. During July 1962, they took delivery of their first three aircraft, which was configured to seat up to 25 passengers.<ref name="vert_Tandom"/> During 1965, Boeing Vertol sold the manufacturing rights of the 107 to Japanese [[Conglomerate (company)|conglomerate]] [[Kawasaki Heavy Industries]]. Under this arrangement, all Model 107 civilian and military aircraft [[#Japanese versions|built in Japan]] were referred to by the ''KV 107'' designation.<ref name="vert_Tandom"/> On 15 December 2006, [[Columbia Helicopters, Inc]] acquired the [[type certificate]] for the BV 107-II; at the time, the company was reportedly in the process of acquiring a Production Certificate from the [[Federal Aviation Administration]] (FAA). Plans for actual production of the aircraft were not announced.<ref name="vert_Tandom"/>

==Design==
[[File:US Navy 021023-N-5471P-004 A CH-46 "Sea Knight" helicopter carries supplies to the Mobile Bay during a replenishment at sea (RAS) with the USS Camden (AOE 2).jpg|thumb|Sea Knight carrying supplies, with its tricycle landing gear silhouetted]]
[[File:US Navy 030205-N-4294K-003 U.S. Navy Lieutenant Jeremy Fischer from Virginia Beach, Va., looks out from his helicopter cockpit window.jpg|thumb|left|Looking out from a cockpit of a CH-46, at another]]

The ''Boeing Vertol CH-46 Sea Knight'' is a medium-lift tandem-rotor [[transport helicopter]], furnished with a set of counter-rotating main rotors in a tandem-rotor configuration. It was typically powered by a pair of General Electric T58 turboshaft engines, which were mounted on each side of the rear rotor pedestal; power to the forward rotor was transferred from the rear-mounted engines via a [[drive shaft]]. For redundancy, both engines are coupled so that either one would be capable of powering both of the main rotors in the event of a single engine failure or a similar emergency situation. Each of the rotors feature three blades, which can be folded to better facilitate storage and naval operations.<ref name="vect_CH-46">[http://www.airvectors.net/avch47_1.html "Boeing Sea Knight"]. Vectorsite.net, 1 August 2011.</ref> The CH-46 features a fixed [[tricycle landing gear]], complete with twin wheels on all three legs of the landing gear; this configuration results in a nose-up stance, helping to facilitate cargo loading and unloading. Two of the main landing gear were installed within protruding rear [[sponson]]s; the free interior space of the sponsons are also used to house fuel tanks, possessing a total capacity of 350 US gallons (1,438 L).<ref name="vect_CH-46"/>

[[File:CH-46 Machine Gun.jpg|thumb|right|A door gunner manning a pintle-mounted [[M2 Browning|.50-caliber M2]] machine gun aboard a Marine CH-46, August 2006]]
The interior of the CH-46 was largely taken up by its cargo bay, complete with a rear loading ramp that could be removed or left open in flight for the carriage of extended cargoes or for parachute drops. Various furnishings were normally provided to aid in its use as a utility rotorcraft, such as an internal [[winch]] mounted within the forward cabin, which can be used to assisting loading by pulling external cargo on [[pallet]]s into the aircraft via the ramp and rollers, and an optionally-attached belly-mounted [[Cargo hook (helicopter)|cargo hook]], which would be usually rated at {{convert|10000|lb|abbr=on}} for carrying cargoes externally underneath the Sea Knight; despite the hook having been rated at {{convert|10000|lb|abbr=on}}, this was safety restricted to less payload as they got older. When operated in a typical configuration, the CH-46 would usually be operated by a crew of three; a larger crew could be accommodated when required, which would be dependent upon mission specifics. For example, a [[search and rescue]] (SAR) variant would usually carry a crew of five (Pilot, Co-Pilot, Crew Chief, Swimmer, and Medic) to facilitate all aspects of such operations. For self-defense, a [[pintle]]-mounted [[M2 Browning|0.50 in (12.7&nbsp;mm) Browning]] [[machine gun]] could be mounted on each side of the helicopter.<ref name="vect_CH-46"/> Service in southeast Asia resulted in the addition of [[armor]] along with the machine guns.<ref name="CH-46_hist_USN"/>

The CH-46 was a partially [[amphibious helicopter]], and could land directly on  water and rest for up to two hours<ref name=NatGeo/> in calm water.<ref>Air Vectors. ''The Boeing Sea Knight & Chinook''. [http://www.vectorsite.net/avch47.html "Sea Knight In Military Service."] {{webarchive |url=https://web.archive.org/web/20091003202506/http://www.vectorsite.net/avch47.html |date=October 3, 2009 }} Retrieved on September 28, 2009.</ref> The rear [[sponson]]s hold two of the three landing gear units as well as self-sealing fuel tanks.<ref name=NatGeo>National Geographic. [http://channel.nationalgeographic.com/series/on-board/3654/Overview#tab-facts ''On Board Marine One: Facts.''] {{webarchive |url=https://web.archive.org/web/20090906085555/http://channel.nationalgeographic.com/series/on-board/3654/Overview#tab-facts |date=September 6, 2009 }} Retrieved on September 28, 2009.</ref>

==Operational history==
[[File:HH-46D of HC-11 over USS Tripoli (LPH-10) in 1994.jpeg|thumb|left|HH-46D of the Navy resupplies {{USS|Tripoli|LPH-10|6}}, 1994]]

===United States===
Known colloquially as the "Phrog", the Sea Knight was used in all U.S. Marine operational environments between its introduction during the Vietnam War and its retirement in 2015.<ref name=Yuan>{{cite web|url=https://dc.medill.northwestern.edu/blog/2015/08/03/marines-say-farewell-to-the-phrog-after-its-final-flight/#sthash.0kr52ciz.dpbs|title=Marines say farewell to the Phrog after its final flight|publisher=Medill News Service|author1=Yuan Gu|author2=Siyao Long|author3=Kulwant Saluja|date=3 August 2015|access-date=20 June 2024|archive-date=20 June 2024|archive-url=https://web.archive.org/web/20240620083815/https://dc.medill.northwestern.edu/blog/2015/08/03/marines-say-farewell-to-the-phrog-after-its-final-flight/#sthash.0kr52ciz.dpbs|url-status=dead}}</ref> The type's longevity and reputation for reliability led to mantras such as "phrogs phorever" and "never trust a helicopter under 30".<ref>{{cite web|title=Ask A Marine|publisher=HMM-364 Purple Foxy Ladies|url=http://www.purplefoxyladies.com/ask.html|url-status=dead|archive-url=https://web.archive.org/web/20061230060309/http://purplefoxyladies.com/ask.html|archive-date=30 December 2006}}</ref> CH-46s transported personnel, evacuated wounded, supplied forward arming and refueling points (FARP), performed vertical replenishment, search and rescue, recovered downed aircraft and crews and other tasks.

====Vietnam War====
[[File:CH-46 Shot down during Operation Hastings.jpg|thumb|A flaming Marine CH-46 of HMM-265, after being hit by enemy AAA fire in "[[Helicopter Valley]]", 15 July 1966<ref>{{cite news |last=King |first=Tim |date=23 April 2012 |title=Vietnam's Helicopter Valley: Graveyard of Marine CH-46's |url=http://www.salem-news.com/articles/april232012/helicopter-valley-tk.php |newspaper=Salem-News.com |location=Salem, OR |access-date=12 December 2014}}</ref>]]

During the Vietnam War, the CH-46 was one of the prime US Marine troop transport helicopters in the theater, slotting between the smaller [[Bell UH-1 Iroquois]] and larger [[Sikorsky CH-53 Sea Stallion]] and progressively replacing the [[Sikorsky H-34|UH-34]]. CH-46 operations were plagued by major technical problems; the engines, being prone to [[foreign object damage]] (FOD) from debris being ingested when hovering close to the ground and subsequently suffering a [[compressor stall]], had a lifespan as low as 85 flight hours; on 21 July 1966, all CH-46s were grounded until more efficient filters had been fitted.<ref>Dunstan 2003, pp. 182–184.</ref>

On 3 May 1967, a CH-46D at [[Marine Corps Air Station Tustin|Marine Corps Air Facility Santa Ana]] crashed, killing all four members of the crew. Within three days the accident investigators had determined that the mounting brackets of the main transmission had failed, allowing the front and rear overlapping rotors to intermesh. All CH-46s were temporarily grounded for inspection. On 13 May, a CH-46A crashed off the coast of Vietnam when the tail pylon containing the engines, main transmission and aft rotors broke off in flight. All four crew members were killed. On 20 June, another CH-46A crashed, though two of the four-man crew survived. Once again, even though the aircraft was not recovered from the water, failure of some sort in the rear pylon was suspected. On 30 June a CH-46D at Santa Ana crashed when a rotor blade separated from the aircraft, all three of the crew survived. As a result of this latest accident, all CH-46Ds were immediately grounded, but the CH-46As continued flying. On 3 July another CH-46A crashed in Vietnam, killing all four Marines of its crew. The cause of the crash again was traced to failure of the main transmission.<ref name=Fails>{{citation-attribution|1={{cite book|last=Fails|first=William|title=Marines and Helicopters 1962-1973|publisher=History and Museums Division United States Marine Corps|year=1978|url=https://www.usmcu.edu/Portals/218/Marines%20and%20Helicopters%201962-1973%20%20PCN%2019000307400.pdf |archive-url=https://web.archive.org/web/20210402134726/https://www.usmcu.edu/Portals/218/Marines%20and%20Helicopters%201962-1973%20%20PCN%2019000307400.pdf |archive-date=2021-04-02 |url-status=live|isbn=978-1482313598}}}}</ref>{{rp|121–2}}

On 31 August 1967, a CH-46A on a medical evacuation mission to {{USS|Tripoli|LPH-10|6}} disintegrated in midair killing all its occupants. The following day another CH-46A experienced a similar incident at [[Marble Mountain Air Facility]] leading to the type being grounded for all except emergency situations and cutting Marine airlift capacity in half.<ref name=Telfer>{{citation-attribution|1={{cite book|last=Telfer|first=Gary I.|title=U.S. Marines in Vietnam: Fighting the North Vietnamese 1967|publisher=History and Museums Division, Headquarters, U.S. Marine Corps|year=1984|url=https://archive.org/details/FightingTheNorthVietnamese|isbn=978-1482538878}}}}</ref>{{rp|170}} An investigation conducted by a joint Naval Air Systems Command/Boeing Vertol accident investigation team revealed that structural failures were occurring in the area of the rear pylon resulting in the rear rotor tearing off in flight and may have been the cause of several earlier losses. The team recommended structural and systems modifications to reinforce the rear rotor mount as well as installation of an indicator to detect excessive strain on critical parts of the aircraft. 80 CH-46As were shipped to [[Marine Corps Air Station Futenma]], [[Okinawa Prefecture|Okinawa]] where they received the necessary modifications by a combined force of Marine and Boeing Vertol personnel. The modified CH-46As began returning to service in December 1967 and all had been returned to service by February 1968.<ref name=Telfer/>{{rp|210–1}}<ref name=Fails/>{{rp|123}}

During the 1972 [[Easter Offensive]], Sea Knights saw heavy use to convey US and [[South Vietnam]]ese ground forces to and around the front lines.<ref>Hamilton, Molly. [http://www.patriotspoint.org/news_events/former-ch-46-sea-knight-pilot-lends-expertise-to-vietnam-experience-exhibit/ "Former CH-46 Sea Knight pilot lends expertise to Vietnam Experience Exhibit."] {{Webarchive|url=https://web.archive.org/web/20150330080050/http://www.patriotspoint.org/news_events/former-ch-46-sea-knight-pilot-lends-expertise-to-vietnam-experience-exhibit/ |date=30 March 2015 }} ''patriotspoint.org'', 3 November 2014.</ref> Marine CH-46s participated in [[Operation Frequent Wind]], the evacuation of [[Saigon]], in April 1975 and the last helicopter to leave the roof of the [[Embassy of the United States, Saigon|US embassy]] was a CH-46 of [[VMM-164|HMM-164]].<ref>{{cite book |last=Dunham|first=George R|title=U.S. Marines in Vietnam: The Bitter End, 1973-1975 (Marine Corps Vietnam Operational Historical Series)|publisher=Marine Corps Association|year=1990|url=https://www.usmcu.edu/Portals/218/U_S_%20Marines%20In%20Vietnam%20-%20The%20Bitter%20End%201973%20-%201975.pdf|isbn=978016026455-9|page=200}}{{PD-notice}}</ref> By the end of US military operations in Vietnam, over a hundred Sea Knights had been lost to enemy fire.<ref name="Pensa">{{cite web |title=CH-46 Sea Knight |url=https://www.navalaviationmuseum.org/aircraft/ch-46-sea-knight/ |website=National Naval Aviation Museum |access-date=6 May 2019 |language=en |date=27 December 2008}}</ref>

====Post-Vietnam====
[[File:US Navy 060219-N-5067K-064 A CH-46E Sea Knight from the Flying Tigers of Marine Medium Helicopter Squadron 262 (HMM-262) takes off after unloading food, blankets, water and other vital supplies to survivors of the devastating l.jpg|left|thumb|CH-46E delivers supplies to survivors of a landslide, 2006]]
[[File:US Navy 040506-M-7034A-040 Lance Cpl. Mike Carro holds security for the Marines assigned to Battalion Landing Team 1-6, after disembarking a Marine CH-46 Sea Knight helicopter during the initial surge of the 22nd Marine Expedit.jpg|thumb|A CH-46 departing after dropping off Marines of the [[22nd Marine Expeditionary Unit]] in South Central Afghanistan, 2004]]

[[File:CH-46 Sea Knight; Flares.jpg|thumb|left|A CH-46E of [[VMM-268]] deploying its onboard countermeasures during [[Operation Iraqi Freedom]], 2008]]
[[File:US Navy 030905-N-9319H-001 A CH-46 Sea Knight transfers cargo.jpg|thumb|CH-46 Sea Knight hauling cargo]]

In February 1968 the [[United States Marine Corps Training and Education Command|Marine Corps Development and Education Command]] obtained several CH-46s to perform herbicide dissemination tests using HIDAL (Helicopter, Insecticide Dispersal Apparatus, Liquid) systems; testing indicated the need for redesign and further study.<ref>{{cite book | last=Darrow | first=Robert A. | title=Historical, Logistical, Political and Technical Aspects of the Herbicide/Defoliant Program, 1967–1971 | publisher=Plant Sciences Laboratories, US Army Chemical Corps | location=Fort Detrick, Frederick MD | date=September 1971 | page=30}} A Resume of the Activities of the Subcommittee on Defoliation/Anticrop Systems (Vegetation Control Subcommittee) for the Joint Technical Coordinating Group/Chemical-Biological.</ref> Tandem-rotor helicopters were often used to transport nuclear warheads; the CH-46A was evaluated to deploy Naval [[Special Forces]] with the [[Special Atomic Demolition Munition]] (SADM).<ref>{{cite web |url=https://www.osti.gov/opennet/forms.jsp?formurl=films/data/0800031.html |title=0800031 Special Atomic Demolition Munition (SADM) Delivery by Parachutist/Swimmer/ Declassified U.S. Nuclear Test Film #31|website=osti.gov |publisher=Department of Energy |access-date=12 December 2014}}</ref> Nuclear Weapon Accident Exercise 1983 (NUWAX-83), simulating the crash of a Navy CH-46E carrying 3 nuclear warheads, was conducted at the [[Nevada Test Site]] on behalf of several federal agencies; the exercise, which used real radiological agents, was depicted in a [[Defense Nuclear Agency]]-produced documentary.<ref name="DTIC">{{cite book |title=NUCLEAR WEAPON ACCIDENT EXERCISE AFTER ACTION REPORT VOLUME I -EXECUTIVE QUICK LOOK |date=17 October 1983 |publisher=JOINT DEPARTMENT OF DEFENSE/DEPARTMENT OF ENERGY/FEDERAL EMERGENCY MANAGEMENT AGENCY |location=KirtlandAir Force Base, Albuquerque, New Mexico |url=https://apps.dtic.mil/dtic/tr/fulltext/u2/a136977.pdf |access-date=6 May 2019 |archive-date=6 May 2019 |archive-url=https://web.archive.org/web/20190506195928/https://apps.dtic.mil/dtic/tr/fulltext/u2/a136977.pdf |url-status=live }}</ref>

U.S. Marine CH-46s were used to deploy the [[8th Marine Regiment]] into [[Grenada]] during [[Operation Urgent Fury]], evacuated the surviving crewmember of a downed AH-1 Cobra, and then carried infantry from the [[75th Ranger Regiment]] to secure and evacuate U.S. students at the Grand Anse campus of [[St. George's University]], though one crashed after colliding with a palm tree.

CH-46E Sea Knights were also used by the U.S. Marine Corps during the [[2003 invasion of Iraq]]. In one incident on 1 April 2003, Marine CH-46Es and CH-53Es carried U.S. Army Rangers and Special Operations troops on an extraction mission for captured Army Private [[Jessica Lynch]] from an Iraqi hospital.<ref>Stout, Jay A. ''Hammer from Above, Marine Air Combat Over Iraq''. Ballantine Books, 2005. {{ISBN|978-0-89141-871-9}}.</ref> During the subsequent occupation of Iraq and counter-insurgency operations, the CH-46E was heavily used in the CASEVAC role, being required to maintain 24/7 availability regardless of conditions.<ref>Cheeca, Rocky. [http://www.airspacemag.com/military-aviation/evacuating-the-injured-43013675/?no-ist "Evacuating the Injured."] ''Air & Space Magazine'', September 2012.</ref> According to authors Williamson Murray and Robert H Scales, the Sea Knight displayed serious reliability and maintenance problems during its deployment to Iraq, as well as "limited lift capabilities".<ref>Murray and Scales 2005, p. 272.</ref> Following the loss of numerous US helicopters in the Iraqi theatre, the Marines opted to equip their CH-46s with more advanced anti-missile countermeasures.<ref name="Warwick">{{cite web |last1=Warwick |first1=Graham |title=Picture: US Marine Corps tests anti-missile system for Boeing CH-46 Sea Knight as Iraq helicopter shoot-downs mount |url=https://www.flightglobal.com/news/articles/picture-us-marine-corps-tests-anti-missile-system-for-boeing-ch-46-sea-knight-as-iraq-helicopter-212283/ |website=Flightglobal.com |access-date=6 May 2019 |date=23 February 2007}}</ref>

The U.S. Navy retired the type on 24 September 2004, replacing it with the [[SH-60 Seahawk|MH-60S Seahawk]];<ref name="Navy Swan song">{{cite web |last = Crawley|first=James W.|title=Swan song for Navy's ugly-duckling copter |publisher=SignonSanDiego.com |url=http://www.signonsandiego.com/uniontrib/20040924/news_2m24phrog.html}}</ref> the Marine Corps maintained its fleet as the [[V-22 Osprey|MV-22 Osprey]] was fielded.<ref>{{cite journal|year=2006|title=Major Acquisition Programs – Aviation Combat Element Programs|url=http://hqinet001.hqmc.usmc.mil/p&r/concepts/2006/PDF/Chapter%203/Part%203/C&P2006Chap3Part3AviationCombatElementPg188-190MV-22%20Osprey.pdf|publisher=Headquarters Marine Corps|url-status=dead|archive-url=https://web.archive.org/web/20070614214327/http://hqinet001.hqmc.usmc.mil/p%26r/concepts/2006/PDF/Chapter%203/Part%203/C%26P2006Chap3Part3AviationCombatElementPg188-190MV-22%20Osprey.pdf|archive-date=14 June 2007}}</ref> In March 2006 Marine Medium Helicopter Squadron 263 (HMM-263) was deactivated and redesignated [[VMM-263]] to serve as the first MV-22 squadron.<ref>{{cite web |last=White |first=LCpl Samuel |title=VMM-263 ready to write next chapter in Osprey program |publisher=U.S. Marine Corps |url=http://www.marines.mil/marinelink/mcn2000.nsf/0/217128503734FF2B8525712A004D67BC?opendocument |url-status=dead |archive-url=https://web.archive.org/web/20080201011556/http://www.marines.mil/marinelink/mcn2000.nsf |archive-date=1 February 2008}}</ref> The replacement process continued through the other medium helicopter squadrons into 2014. On 5 October 2014, the Sea Knight performed its final service flight with the U.S. Marine Corps at [[Marine Corps Air Station Miramar]]. [[HMM-364]] was the last squadron to use it outside the United States, landing it aboard {{USS|America|LHA-6|6}} on her maiden transit. On 9 April 2015, the CH-46 was retired by the [[Marine Medium Helicopter Training Squadron 164]], the last Marine Corps squadron to transition to the MV-22.<ref name="Military.com">{{cite web |title=Venerable 'Sea Knight' Makes Goodbye Flights |url=http://www.military.com/daily-news/2014/10/03/venerable-sea-knight-makes-goodbye-flights.html |website=military.com |access-date=6 May 2019 |date=3 October 2014}}</ref><ref>[http://news.usni.org/2015/04/10/marines-bid-phrog-farewell-to-last-active-ch-46e-sea-knight-squadron Marines Bid ‘Phrog’ Farewell to Last Active CH-46E Sea Knight Squadron] – News.USNI.org, 10 April 2015</ref> The USMC retired the CH-46 on 1 August 2015 in a ceremony at the [[Steven F. Udvar-Hazy Center|Udvar-Hazy Center]] near Washington DC.<ref name=Yuan/>

Beginning in April 2011 the Navy's [[Fleet Readiness Center East]] began refurbishing retired USMC CH-46Es for service with the [[United States Department of State]] [[State Department Air Wing|Air Wing]].<ref>{{cite web|url=https://www.navair.navy.mil/node/18731|title=Sea Knight gets new life|publisher=Naval Air Systems Command|date=9 March 2012|accessdate=16 August 2021|archive-date=16 August 2021|archive-url=https://web.archive.org/web/20210816053941/https://www.navair.navy.mil/node/18731|url-status=dead}}</ref> A number of CH-46s from [[HMX-1]] were transferred to the Air Wing in late 2014.<ref>{{cite web|url=https://www.marines.mil/News/News-Display/Article/497063/half-a-century-spent-making-phrogs-fly/|title=Half a century making Phrogs fly|publisher=United States Marine Corps|author=Sgt. Melissa Karnath|date=10 September 2014|accessdate=16 August 2021}}</ref> In Afghanistan the CH-46s were used by Embassy Air for secure transport of State Department personnel. The CH-46s were equipped with missile warning sensors and flare dispensers and could be armed with M240D or M2 Browning machine guns.<ref>{{cite web|url=https://theaviationist.com/2020/03/24/interesting-new-photos-of-armed-embassy-air-ch-46e-helicopter-at-u-s-embassy-in-kabul-emerge/|title=Interesting New Photos Of Armed "Embassy Air" CH-46E Helicopter At U.S. Embassy in Kabul Emerge|author=David Cenciotti|publisher=The Aviationist|date=24 March 2020|accessdate=16 August 2021}}</ref> A report in September 2019 by the State Department Inspector General found that a seat on a CH-46 for a seven-minute flight cost US$1,500 (~${{Format price|{{Inflation|index=US-GDP|value=1500|start_year=2019}}}} in {{Inflation/year|US-GDP}}).<ref>{{cite news |newspaper=Stars and Stripes |title=Report: Expensive airfares harm embassy operations in Afghanistan and Iraq |author=Philip Wellman |date=24 September 2019 |url=https://www.stripes.com/theaters/middle_east/report-expensive-airfares-harm-embassy-operations-in-afghanistan-and-iraq-1.600300}}</ref>

====Evacuation of Afghanistan====
Seven of the State Department Air Wing CH-46s took part in the [[2021 Kabul Airlift]]. Prior to the complete withdrawal of U.S. forces, all seven were rendered unusable and abandoned at [[Kabul International Airport]] and are seen in many videos and pictures online. One of the CH-46s that was abandoned (BuNo 154038, c/n 2389) also took part in Operation Frequent Wind 46 years earlier. The U.S. State Department drew criticism for leaving behind the aircraft. Commenting on the issue, the U.S. State Department claimed that the helicopters were already being phased out of State Department Air Wing due to their age and the inability to support them. The seven CH-46s left behind were the only U.S. State Department aircraft left behind at Kabul International Airport.<ref>{{cite news |url=https://www.bbc.com/news/world-58393763 |title=Afghanistan: What was left behind by US forces? |publisher=BBC News |date=31 August 2021 |accessdate=1 September 2021}}</ref>

===Canada===
[[File:Boeing Vertol CH-113 Labrador (107-II-9), Canada - Air Force AN0635277.jpg|thumb|left|CH-113 Labrador]]
[[File:Labrador helicopter landing Bell Island.jpg|thumb|upright|right|CH-113 Labrador landing on "The Clapper", a [[sea stack]] off the tip of [[Bell Island (Newfoundland and Labrador)|Bell Island]] in Newfoundland]]

The [[Royal Canadian Air Force]] procured six CH-113 Labrador helicopters for the SAR role and the [[Canadian Army]] acquired 12 of the similar CH-113A Voyageur for the medium-lift transport role. The RCAF Labradors were delivered first with the first one entering service on 11 October 1963.<ref name="Milberry">Milberry, Larry: ''Sixty Years – The RCAF and Air Command 1924–1984'', p. 472. McGraw Hill Ryerson, 1984. {{ISBN|0-07-549484-1}}</ref><ref name=CAM>{{cite web|title=Boeing Vertol CH-113 Labrador|url=http://casmuseum.techno-science.ca/en/collection-research/artifact-boeing-vertol-ch-113-labrador.php|website=Canada Aviation and Space Museum|publisher=Canada Science and Technology Museums Corporation|access-date=10 July 2015}}</ref> When the larger CH-147 Chinook was procured by the [[Canadian Forces]] in the mid-1970s, the Voyageur fleet was converted to Labrador specifications to undertake SAR missions. The refurbished Voyageurs were re-designated as CH-113A Labradors, thus a total of 15 Labradors were ultimately in service.<ref name="CAM" />

The Labrador was fitted with a watertight hull for marine landings, a 5,000 kilogram cargo hook and an external rescue hoist mounted over the right front door. It featured a 1,110 kilometer flying range, emergency medical equipment and an 18-person passenger capacity.<ref name="CAM" /> In multiple instances throughout the 1970s and 1980s, this increased range provided the capability of the CH-113 to provide assistance to [[U.S. Coast Guard]] (USCG) missions or perform long range medevacs over distances the USCG helicopters at the time simply could not reach.<ref>{{cite web | title=Top Ten Coast Guard Rescues |date=Jul 31, 2007 |author=<!--Not stated--> |url=https://coastguardnews.com/top-ten-coast-guard-rescues/2007/07/31/ |publisher=Coast Guard News |accessdate=19 December 2019 }}</ref>

In 1981, a mid-life upgrade of the fleet was carried out by [[Boeing Canada]] in [[Arnprior, Ontario]]. Known as the SAR-CUP (Search and Rescue Capability Upgrade Program), the refit scheme included new instrumentation, a nose-mounted weather radar, a tail-mounted auxiliary power unit, a new high-speed rescue hoist mounted over the side door and front-mounted searchlights. A total of six CH-113s and five CH-113As were upgraded with the last delivered in 1984. Nonetheless, as a search and rescue helicopter it endured heavy use and hostile weather conditions; which had begun to take their toll on the Labrador fleet by the 1990s, resulting in increasing maintenance costs and the need for prompt replacement.<ref name="CAM" />

In 1992, it was announced that the Labradors were to be replaced by 15 new helicopters, a variant of the [[AgustaWestland EH101]], designated ''CH-149 Chimo''. The order was subsequently cancelled by the [[Jean Chrétien]] [[Liberal Party of Canada|Liberal]] government in 1993, resulting in cancellation penalties, as well as extending the service life of the Labrador fleet. However, in 1998, a CH-113 from [[CFB Greenwood]] crashed on Quebec's [[Gaspé Peninsula]] while returning from a SAR mission, resulting in the deaths of all crewmembers on board. The crash placed pressure upon the government to procure a replacement, thus an order was placed with the manufacturers of the EH101 for 15 aircraft to perform the search-and-rescue mission, designated ''[[CH-149 Cormorant]]''. CH-149 deliveries began in 2003, allowing the last CH-113 to be retired in 2004.<ref name="CAM" /> In October 2005 [[Columbia Helicopters]] of [[Aurora, Oregon]] purchased eight of the retired CH-113 Labradors to add to their fleet of 15 Vertol 107-II helicopters.<ref>{{cite web|url=http://www.shephard.co.uk/Rotorhub/default.aspx?Action=745115149&ID=c186be12-8152-418b-9b56-ec198753da2e|title=Columbia Helicopters Acquires eight CH-113 Labrador helicopters from Canadian military|publisher=RotorHub.com|work=RotorHub|archive-url=https://web.archive.org/web/20071222234834/http://www.shephard.co.uk/Rotorhub/default.aspx?Action=745115149&ID=c186be12-8152-418b-9b56-ec198753da2e |archive-date=22 December 2007|access-date=5 December 2010}}</ref>

=== Sweden ===
[[File:Hkp 4A, 01.jpg|thumb|left|Hkp 4A, 1983]]
In 1963, Sweden procured ten UH-46Bs from the US as a transport and anti-submarine helicopter for the [[Swedish Armed Forces]], designated Hkp 4A. In 1973, a further eight Kawasaki-built KV-107s, which were accordingly designated Hkp 4B, were acquired to replace the older Piasecki H-21. During the Cold War, the fleet's primary missions were anti-submarine warfare and troop transportation. They were also frequently employed in the search and rescue role, most famously during the rescue operation of the [[MS Estonia|MS ''Estonia'']] after it [[Sinking of the MS Estonia|sank in the Baltic Sea]] on 28 September 1994. In the 1980s, the Hkp 4A was phased out, having been replaced by the [[Eurocopter AS332 Super Puma]]; the later Kawasaki-built Sea Knights continued in operational service until 2011, they were replaced by the [[UH-60 Black Hawk]] and [[NH90]].

===Argentina===
On 15 September 2023, [[Argentina]]'s [[Argentine Air Force|Air Force]] chief Gen. [[Xavier Issac]] briefed the media that Argentina had sent a letter requesting the US to approve the refurbishment of surplus CH-46s currently stored with the [[309th Aerospace Maintenance and Regeneration Group]] in [[Arizona]]. The availability of civilian-operated CH-46s was also being explored. They would be used to support [[Argentine Antarctica#Argentine bases|Argentina's Antarctic bases]]. The CH-46s would replace two [[Mil Mi-17#Export variants|Mil Mi-171E]] helicopters acquired in 2010, but now not able to be repaired by [[Russia]] due to sanctions from the [[Russian invasion of Ukraine]].<ref name="2023-09-22_DN">Higuera, José. [https://www.defensenews.com/global/the-americas/2023/09/21/argentina-eyes-surplus-ch-46-helicopters-as-mi-17-replacement/ "Argentina eyes surplus CH-46 helicopters as Mi-17 replacement"]. Defense News, 23 September 2023.</ref>

===Civilian and others===
[[File:P2CHE.jpg|thumb|Columbia Helicopters BV 107-II in Papua New Guinea]]

The civilian version, designated as the BV 107-II ''Vertol'',<ref name="vert_Columbia">Eichel, Garth. "Columbia Helicopters". ''Vertical Magazine'', February–March 2007.</ref> was developed prior to the military CH-46. It was operated commercially by New York Airways, [[Pan American World Airways]] and later on by Columbia Helicopters.<ref name="vert_Columbia"/> Among the diversity of tasks was commuter service in the mid-1960s from the roof of the [[MetLife Building|Pan Am skyscraper]] in Manhattan to [[John F. Kennedy International Airport|JFK Airport]] in Queens,<ref name="Schneider">{{Cite news |last=Schneider |first=Daniel B. |date=July 25, 1999 |title=F.Y.I. |language=en-US |work=The New York Times |url=https://www.nytimes.com/1999/07/25/nyregion/fyi-729590.html |access-date=March 25, 2021 |issn=0362-4331 |archive-date=August 12, 2019 |archive-url=https://web.archive.org/web/20190812100032/https://www.nytimes.com/1999/07/25/nyregion/fyi-729590.html |url-status=live}}</ref> pulling a [[hover barge]],<ref>[http://verticalmag.com/news/articles/happy-birthday-to-columbia-helicopters--oregon-based-company-celebrates-its-50th-anniversary.html "Happy birthday to Columbia Helicopters! Oregon-based company celebrates its 50th anniversary"] ''Vertical (magazine)'', 18 April 2007. Retrieved: 24 August 2012.</ref><ref>[http://www.colheli.com/news/the_hover_barge/ "The hover barge"] {{webarchive|url=https://web.archive.org/web/20160213052802/http://www.colheli.com/news/the_hover_barge/ |date=13 February 2016}} ''[[Columbia Helicopters]]''. Retrieved: 24 August 2012.</ref> and constructing [[transmission tower]]s for [[overhead power line]]s.<ref>{{cite web|url=http://www.verticalmag.com/news/article/PoweringUp |archive-url=https://web.archive.org/web/20151004113042/http://www.verticalmag.com/news/article/PoweringUp |title=Powering Up – Vertical Magazine |archive-date=4 October 2015 |work=verticalmag.com |access-date=4 October 2015 |url-status=live}}</ref>

In December 2006, Columbia Helicopters purchased the type certificate of the Model 107 from Boeing, with the aim of eventually producing new-build aircraft themselves.<ref>{{cite web |title=Type Certificate Data Sheet No. 1H16 |publisher=Federal Aviation Administration |date=17 January 2007 |url=http://www.airweb.faa.gov/Regulatory_and_Guidance_Library%5CrgMakeModel.nsf/0/FA4E77BC4812A0258625726B00663586/$FILE/1H16.pdf |access-date=8 February 2007 |archive-url=https://web.archive.org/web/20200219070151/https://www.airweb.faa.gov/Regulatory_and_Guidance_Library%5CrgMakeModel.nsf/0/FA4E77BC4812A0258625726B00663586/$FILE/1H16.pdf |archive-date=19 February 2020 |url-status=dead}}</ref>

==Variants==

===American versions===
[[File:US Navy 030415-N-2385R-005 A CH-46 Sea Knight assigned to the "Gunbearers" of Helicopter Combat Support Squadron Eleven (HC-11).jpg|thumb|left|CH-46 Sea Knight of HC-11]]

;Model 107: Company model number for basic prototype, one built.
;Model 107-II: Commercial airline helicopter. All subsequent commercial aircraft were produced as BV 107-II-2, two built as Boeing Vertol prototypes, five sold to New York Airways, ten supplied to Kawasaki as sub-assemblies or as parts. The second prototype was later rebuilt into a Sea Knight replacement for a lost unit in the Swedish navy she was named Y64 in Swedish service.{{citation needed|date=December 2018}}
;Model 107M: Company model number for military transport of BV-107/II-2 for the [[United States Marine Corps|U.S. Marine Corps]].
;YHC-1A: Vertol Model 107 for test and evaluation by the [[United States Army]]. Adopted by the U.S. Marine Corps as the HRB-1. Later redesignated '''YCH-46C''', three built.
;HRB-1: Original designation before being renamed as CH-46A before delivery under the [[1962 United States Tri-Service aircraft designation system]].
;CH-46A: Medium-lift assault and cargo transport and SAR helicopter for the USMC, fitted with two 1,250 shp (935&nbsp;kW) General Electric T58-GE-8 turboshaft engines. Previously designated HRB-1. 160 built for USMC, one static airframe.
;UH-46A: Medium-lift utility transport helicopter for the [[United States Navy]]. Similar to the CH-46A. 14 built.
;HH-46A: Approximately 50 CH-46As were converted into SAR helicopters for the United States Navy base rescue role.
;RH-46A: Planned conversion of CH-46As into minesweeping helicopters for the US Navy, none converted. Nine [[SH-3 Sea King#US military|SH-3As]] were converted to the RH-3A configuration instead.
;UH-46B: Development of the CH-46A to specification HX/H2 for the [[United States Air Force]]; 12 ordered in 1962, cancelled and Sikorsky S-61R / CH-3C ordered instead.
;YCH-46C: YHC-1A redesignated in 1962. [[United States Army]] retained two, [[National Aeronautics and Space Administration|NASA]] used one for vertical autonomous landing trials (VALT).
[[File:HMX-1 - Sea Knights - CH-46.jpg|thumb|A [[HMX-1]] CH-46D departs [[Santa Barbara Municipal Airport]].]]
;CH-46D: Medium-lift assault and cargo transport helicopter for the USMC, fitted with two 1,400 shp (1,044&nbsp;kW) General Electric T58-GE-10 turboshaft engines. 266 built.
;HH-46D: Surviving HH-46A were upgraded and a small number of UH-46Ds were converted into SAR helicopters. SAR upgrades included the addition of an external rescue hoist near the front crew door and an 18-inch X 18-inch Doppler RADAR system located behind the nose landing gear, which provided for automatic, day/night, over-water hovering capability for at sea rescue. Additionally a "Loud Hailer" was installed opposite the crew entrance door for communicating with downed aviators on the ground or in the water.
[[File:USS Decatur (DD-936), 1968, vertrep.jpg|thumb|A UH-46D lowers mail to the fantail of [[USS Decatur (DD-936)|USS ''Decatur'']].]]
;UH-46D: Medium-lift utility transport helicopter for the US Navy combat supply role. Similar to the CH-46D. Ten built and one conversion from CH-46D.
;CH-46E: Approximately 275 -A, -D, and -F airframes were updated to CH-46E standards with improved avionics, hydraulics, drive train and upgraded T58-GE-16 and T58-GE-16/A engines.
[[File:HH-46D (13832220724).jpg|thumb|HH-46D used for SAR by the USMC]]
;HH-46E: Three CH-46Es were converted into SAR helicopters for Marine Transport Squadron One (VMR-1) at MCAS Cherry Point.<ref>{{cite news |url=http://www.cherrypoint.usmc.mil/windsockprint/2007/20%20Dec%202007.pdf |title=Pedro retires last HH-46Ds |last= Payne |first=Doug |date=20 December 2007 |work=The Windsock |publisher=[[Marine Corps Air Station Cherry Point]], [[North Carolina|NC]] |pages=A1, A3 |access-date= 27 July 2008 |url-status=dead |archive-url= https://web.archive.org/web/20090327101701/http://www.cherrypoint.usmc.mil/windsockprint/2007/20%20Dec%202007.pdf |archive-date= 27 March 2009}}</ref>
[[File:CH-46F of HMM-261 on USS Guam (LPH-9) 1984.JPEG|thumb|CH-46F in 1984]]
;CH-46F: Improved version of CH-46D, electrical distribution, com/nav update BUNO 154845-157726. Last production model in the United States. 174 built, later reverted to CH-46E.{{Citation needed|date=May 2011}}
;VH-46F: Unofficial designation of standard CH-46F used by HMX-1 as VIP support transport helicopter.
;CH-46X: Replacement helicopter based on the [[Boeing Model 360]], this Advance Technology Demonstrator from the 1980s never entered production. The aircraft relied heavily on composites for its construction and had a beefier drive train to handle the twin Avco-Lycoming AL5512 engines (4,200 shp).<ref>{{cite web|url=http://www.airport-data.com/aircraft/photo/090492.html |title=Photo of Boeing Model 360 with CH-46X tail markings |publisher=Airport-data.com |date=17 June 2007}}</ref>
;XH-49: Original designation of UH-46B.

===Canadian versions===
;CH-113 Labrador: Search and rescue version of the Model 107-II-9 for the Royal Canadian Air Force
;CH-113A Voyageur: Assault and utility transport version of the Model 107-II-28 for the Canadian Army. Later converted to CH-113A Labrador when the Canadian Forces acquired the CH-47 Chinook

===Japanese versions===
[[File:Helicopter at Yellowstone 1988.jpg|thumb|upright|right|CHI Kawasaki Vertol KV-107II slinging a bucket during the [[Yellowstone fires of 1988]]]]
[[File:V107II 2014.jpg|thumb|The cockpit of a 107II manufactured by Kawasaki]]
[[File:V-107A-7.JPG|thumb|Interior of a V-107 at a museum]]

;KV-107II-1 (CT58-110-1)
:Utility transport version, one built from Boeing-supplied kits.
;KV-107II-2 (CT58-110-1)
:Commercial airline version, nine built from Boeing-supplied kits.
;KV-107IIA-2 (CT58-140-1)
:Improved version of the KV-107/II-2, three built.
;KV-107II-3 (CT58-110-1)
:Minesweeping version for the [[Japan Maritime Self-Defense Force]] (JMSDF), two built.
;KV-107IIA-3 (CT58-IHI-10-M1)
:Uprated version of the KV-107/II-3, seven built.
;KV-107II-4 (CT58-IHI-110-1)
:Assault and utility transport version for the [[Japan Ground Self-Defense Force]] (JGSDF), 41 built.
;KV-107II-4A (CT58-IHI-110-1)
:VIP version of the KV-107/II-4, one built.
;KV-107IIA-4 (CT58-IHI-140-1)
:Uprated version of the KV-107/II-4, 18 built.
;KV-107II-5 (CT58-IHI-110-1)
:Long-range SAR version for the [[Japan Air Self-Defense Force]] (JASDF), 17 built.
;KV-107IIA-5 (CT58-IHI-104-1)
:Uprated version of the KV-107II-5, 35 built.
;KV-107II-7 (CT58-110-1)
:VIP transport version, one built.
;KV-107II-16
:HKP 4C for [[Swedish Navy]]. Powered by [[Rolls-Royce Gnome]] H.1200 turboshaft engines, eight built.
;KV-107IIA-17 (CT58-140-1)
:Long-range transport version for the Tokyo Metropolitan Police Department, one built.
;KV-107IIA-SM-1 (CT58-IHI-140-1M1)
:[[Helitack|Firefighting helicopter]] for Saudi Arabia, seven built.
;KV-107IIA-SM-2 (CT58-IHI-140-1M1)
:Aeromedical and rescue helicopter for Saudi Arabia, four built.
;KV-107IIA-SM-3 (CT58-IHI-140-1M1)
:VIP transport helicopter for Saudi Arabia, two built.
;KV-107IIA-SM-4 (CT58-IHI-140-1M1)
:Air ambulance helicopter for Saudi Arabia, three built.

===Swedish versions===
[[File:Hkp 4B 01.jpg|thumb|left|Boeing-Vertol civil prototype in service with the [[Swedish Navy]] as an HKP 4B in 1981]]

;HKP 4A: Boeing Vertol 107-II-14, used originally by Air Force for search and rescue, ten built
;HKP 4B: Boeing Vertol 107-II-15, mine-layer/antisubmarine warfare/search and rescue helicopter for Navy, three built and one conversion from Boeing-Vertol civil prototype
;HKP 4C: Kawasaki KV-107-II-16, advanced mine-layer/ASW/SAR helicopter for Navy, eight built
;HKP 4D: Rebuilt HKP 4A for Navy as SAR/ASW helicopter, four conversions

==Operators==
;{{Flag|Canada}}
* Helifor Canada<ref>{{cite web|url=http://www.helifor.com/index.php?option=com_content&task=view&id=13&Itemid=27|title=Helifor Fleet|publisher=helifor.com|access-date=7 March 2013|archive-date=27 October 2012|archive-url=https://web.archive.org/web/20121027141610/http://www.helifor.com/index.php?option=com_content&task=view&id=13&Itemid=27|url-status=dead}}</ref>
;{{Flag|United States}}
* [[Columbia Helicopters]]<ref>{{cite web |url= http://www.colheli.com/operations/our_aircraft/columbia_107-ii/ |title= Columbia 107-II |publisher= colheli.com |access-date=7 March 2013}}</ref>
* Sky Aviation Corp<ref>{{cite web |url= http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/585d84daf1151a1b86257f0600537d1a/$FILE/R0013DE_Rev_3.pdf |title= TYPE CERTIFICATE DATA SHEET R0013DE |publisher= Federal Aviation Administration |date= 9 October 2015 |access-date= 19 June 2017 |archive-date= 23 August 2017 |archive-url= https://web.archive.org/web/20170823071615/http://rgl.faa.gov/Regulatory_and_Guidance_Library/rgMakeModel.nsf/0/585d84daf1151a1b86257f0600537d1a/$FILE/R0013DE_Rev_3.pdf |url-status= dead }}</ref>

===Former operators===
[[File:Boeing Vertol CH-113 Labrador (107-II-9), Canada - Air Force AN0635276.jpg|thumb|Canadian CH-113 Labrador]]
;{{Flag|Canada}}
* [[Canadian Army]] - Voyageur variant (later as CH-113A)<ref>{{cite web |url=http://www.flightglobal.com/pdfarchive/view/1981/1981%20-%202502.html |title=World's Air Forces 1981, p. 330 |publisher= flightglobal.com |access-date=7 March 2013}}</ref>
* [[Royal Canadian Air Force]] - both CH-113 and CH-113A<ref>{{cite web|url= http://www.aviation.technomuses.ca/collections/artifacts/aircraft/BoeingVertolCH-113Labrador/|title= Boeing Vertol CH-113 Labrador|access-date= 3 January 2013|archive-url= https://web.archive.org/web/20080926184835/http://www.aviation.technomuses.ca/collections/artifacts/aircraft/BoeingVertolCH-113Labrador/|archive-date= 26 September 2008|url-status= dead}}</ref>
** [[103 Search and Rescue Squadron]]
** [[413 Transport and Rescue Squadron]]
** 102 Composite Unit / [[424 Transport and Rescue Squadron]]
** [[442 Transport and Rescue Squadron]]
** [[450 Tactical Helicopter Squadron|450 Transport Helicopter Squadron]]
[[File:JGSDF V-107 20090419-02.jpg|thumb|JGSDF V-107]]
;{{Flag|Japan|1947}}
* [[Japan Air Self-Defense Force]]<ref name="WAF_1987_p66">{{cite web |title= World Air Forces 1987, p. 66 |url= http://www.flightglobal.com/pdfarchive/view/1987/1987%20-%202516.html |access-date= 7 March 2013}}</ref>
* [[Japan Ground Self-Defense Force]]<ref name="WAF_1987_p66"/>
* [[Japan Maritime Self-Defense Force]]<ref name="WAF_1987_p66"/>
* [[Tokyo Metropolitan Police Department]]<ref>{{cite web|url=http://flyteam.jp/photo/tokyo-metropolitan-police-department/Kawasaki-V-107-IIA-17/160228|archive-url=https://archive.today/20130218165413/http://flyteam.jp/photo/tokyo-metropolitan-police-department/Kawasaki-V-107-IIA-17/160228|url-status=dead|archive-date=18 February 2013|title=警視庁 – Tokyo Metropolitan Police Department|access-date=15 December 2012}}</ref>
;{{Flag|Saudi Arabia}}
* [[Ministry of Interior (Saudi Arabia)|Ministry of Interior]]<ref>{{cite web |url=http://www.flightglobal.com/pdfarchive/view/2004/2004-09%20-%202376.html |title=World Air Forces 2004 p. 83 |publisher= flightglobal.com |access-date=7 March 2013}}</ref><ref>{{cite web|url=http://www10.plala.or.jp/strgzr/aircraft/kv107/kv107_e.html|title=Kawasaki/Vertol KV107 operators|access-date=15 December 2012|url-status=dead|archive-url=https://web.archive.org/web/20160304041938/http://www10.plala.or.jp/strgzr/aircraft/kv107/kv107_e.html|archive-date=4 March 2016}}</ref>
[[File:Boeing Vertol Hkp4A (107-II-4), Sweden - Air Force AN1113714.jpg|thumb|A HKP 4A variant with the [[Swedish Air Force]]]]
;{{Flag|Sweden}}
* [[Swedish Air Force]]<ref name="WAF_1987_p91">{{cite web |title= World Air Forces 1987, p. 91 |url= http://www.flightglobal.com/pdfarchive/view/1987/1987%20-%202541.html |access-date= 7 March 2013}}</ref>
* [[Swedish Navy]]<ref name="WAF_1987_p91"/>
{{Flag|Thailand}}
* [[Royal Thai Army]]<ref>{{cite web |url=http://www.thai-aviation.net/Photos_Army6.html|title=Thai aviation history |access-date=14 December 2012 |url-status=dead |archive-url=https://web.archive.org/web/20131203024754/http://www.thai-aviation.net/Photos_Army6.html |archive-date=3 December 2013}}</ref>
[[File:US Navy 040804-N-7512V-133 A U.S. Army soldier assigned to the First Battalion of First Special Operations Airborne Unit, Torii Station, Okinawa, Japan, performs a static jump.jpg|thumb|Soldiers jump from a CH-46 in 2004]]
;{{Flag|United States|1960}}
* [[New York Airways]]<ref>{{cite web |url=http://www.edcoatescollection.com/ac3/Airline/New%20York%20Airways%20Boeing-Vertol%20V107.html |title= New York Airways Boeing-Vertol V 107 N6672D |access-date=15 December 2012}}</ref>
* [[Pan American Airways]]<ref>{{cite web |url=http://verticalmag.com/news/articles/20448-heavy-lift-helpers.html |title=HEAVY-LIFT HELPERS |publisher= Vertical magazine |access-date=17 December 2012}}</ref>
* [[United States Marine Corps]]<ref>{{cite web |url=http://www.utsandiego.com/news/2014/oct/09/marine-helicopter-ch46-osprey-hmm364/ |title= Vietnam-era Marine helo flies into history |publisher= utsandiego.com |access-date=14 December 2014}}</ref>
** [[HMX-1]]<ref>{{cite web |url= http://www.globalsecurity.org/military/agency/usmc/hmx-1.htm |title= HMX-1 |publisher= globalsecurity.org |access-date=7 March 2013}}</ref>
** [[HMM-262]]<ref>{{cite web |url=http://www.globalsecurity.org/military/agency/usmc/hmm-262.htm |title=Marine Medium Helicopter Squadron-262 [HMM-262] |publisher= globalsecurity.org |access-date=7 March 2013}}</ref>
** [[HMM-265]]<ref>{{cite web |url=http://www.globalsecurity.org/military/agency/usmc/hmm-265.htm |title=Marine Medium Helicopter Squadron-265 |publisher= globalsecurity.org |access-date=7 March 2013}}</ref>
** [[HMM-268]]<ref>{{cite web |url=http://www.globalsecurity.org/military/agency/usmc/hmm-268.htm |title=Marine Medium Helicopter Squadron-268 |publisher= globalsecurity.org |access-date=7 March 2013}}</ref>
** [[HMM-364]]<ref>{{cite web |url=http://www.globalsecurity.org/military/agency/usmc/hmm-364.htm |title=Marine Medium Helicopter Squadron-364 |publisher= globalsecurity.org |access-date=7 March 2013}}</ref>
** [[HMM-764]]<ref>{{cite web |url= http://hma1369.tripod.com/764.html |title= Marine Medium Helicopter Squadron 764 |publisher= tripod.com |access-date= 7 March 2013 |archive-url= https://web.archive.org/web/20131203005615/http://hma1369.tripod.com/764.html |archive-date= 3 December 2013 |url-status= dead}}</ref>
** [[HMM-774]]<ref>{{cite web |url= http://hma1369.tripod.com/774.html |title= Marine Medium Helicopter Squadron 774 |publisher= tripod.com |access-date= 7 March 2013 |archive-url= https://web.archive.org/web/20160323160216/http://hma1369.tripod.com/774.html |archive-date= 23 March 2016 |url-status= dead}}</ref>
** [[HMMT-164]]<ref>{{cite web |url= http://hma1369.tripod.com/164.html |title= Marine Medium Helicopter Training Squadron 164 |publisher= tripod.com |access-date= 7 March 2013 |archive-url= https://web.archive.org/web/20141214192406/http://hma1369.tripod.com/164.html |archive-date= 14 December 2014 |url-status= dead}}</ref><ref>{{cite web |url=http://www.utsandiego.com/news/2014/oct/09/marine-helicopter-ch46-osprey-hmm364/|title=Vietnam-era Marine helo flies into history |first=Gretel C. |last=Kovach}}</ref>
** [[VMR-1]]<ref name="VMR-1">{{cite web |url= http://www.globalsecurity.org/military/agency/usmc/vmr-1.htm |title= VMR-1|publisher= globalsecurity.org |access-date=7 March 2013}}</ref><ref>{{cite web |url=http://www.cherrypoint.marines.mil/Photos.aspx?igphoto=2000948329 |title=Marine Corps Air Station Cherry Point Photos |publisher=MCAS Cherry Point |date=15 October 2014 |access-date=22 June 2015}}</ref>
* [[United States Navy]]<ref>{{cite web |url=http://www.flightglobal.com/pdfarchive/view/2004/2004-09%20-%202389.html |title=World Air Forces 2004, p. 96 |publisher= flightglobal.com |access-date=21 March 2015}}</ref><ref>{{cite book |last1=Polmar |first1=Norman |title=The Naval Institute Guide to the Ships and Aircraft of the U.S. Fleet |date=2005 |isbn=978-1-59114-685-8|edition=18th |url=https://books.google.com/books?id=8MwyTX-iA2wC&pg=PA384|page=384|publisher=Naval Institute }}</ref>
[[File:State Department Air Wing CH-46E.jpg|thumb|left|[[State Department Air Wing]] CH-46E in 2012]]
* [[United States Department of State]]
** [[State Department Air Wing]]<ref>{{cite web |url= http://www.marinecorpstimes.com/news/2012/05/marine-new-life-phrogs-state-department-052012/ |title= Old Phrogs get new life |publisher= 2012, Gannett Government Media Corporation |access-date= 15 December 2012 |url-status= dead |archive-url= https://web.archive.org/web/20130603132502/http://www.marinecorpstimes.com/news/2012/05/marine-new-life-phrogs-state-department-052012/ |archive-date= 3 June 2013 |df= dmy-all}}</ref>

==Notable accidents and incidents==
{{Multiple image
|image1=CH-46 Sea Knight crash, 1987.ogg
|image_caption1=A CH-46 crash in 1987
|image2=Navy CH-46 Helicopter Crash Incident USNS Pecos Missed Landing.ogg
|image_caption2=A CH-46 crash in 1999}}

*On 14 October 1963 New York Airways Flight 600, a Boeing Vertol 107, registration N6673D, crashed shortly after takeoff from [[John F. Kennedy International Airport|Idlewild Airport]] (now JFK) en route to [[Newark Liberty International Airport|Newark]] via Wall Street. All three passengers and all three crew members died. The accident was caused by mechanical failure due to contaminated lubricants.<ref>{{cite report |title=Aircraft Accident Report – New York Airways, Inc., Boeing-Vertol 107-II N6673D, New York International Airport, Jamaica, New York, October 14, 1963 |publisher=[[National Transportation Safety Board]] |date=24 June 1964 |url=http://www.avsaf.org/reports/US/1963.10.14_NewYorkAirways_Boeing-Vertol107-II.pdf |archive-url=https://web.archive.org/web/20070927081809/http://www.avsaf.org/reports/US/1963.10.14_NewYorkAirways_Boeing-Vertol107-II.pdf |archive-date=2007-09-27 |url-status=live |access-date=2007-02-09}}</ref><ref>[https://aviation-safety.net/wikibase/14572]. aviation-safety.net</ref>
* On 15 July 1966 in the Vietnam War during [[Operation Hastings]], two CH-46As of [[HMM-164]] collided at Landing Zone Crow while another, crashed into a tree avoiding the first two, resulting in 2 Marines killed. Another CH-46 of [[HMM-265]] was shot down at the LZ later that day resulting in a further 13 Marine deaths.<ref>{{cite book |title=U.S. Marines in Vietnam: An Expanding War, 1966 |series=Marine Corps Vietnam Operational Historical Series |last=Shulimson |first=Jack |publisher=Marine Corps Association |year=1982 |pages=164–5 |asin=B000L34A0C}}</ref>
* On 4 June 1968, CH-46D BuNo 152533 of [[HMM-165]] was hit by anti-aircraft fire at [[Landing Zone Loon]] and crashed killing 13 Marines.<ref>{{cite web |url=http://www.popasmoke.com/kia/incidents.php?incident_id=164 |title=680606 HMM-165 Vietnam |publisher=USMC Combat Helicopter Association |access-date=31 December 2014}}</ref>
* On 14 March 1969, CH-46D BuNo 154841 of [[HMM-161]] was hit by a [[RPG-2|B-40 rocket]] as it conducted a resupply and medevac mission at [[Landing Zone Sierra]], killing 12 Marines and 1 Navy corpsman.<ref>{{cite book |last=Smith |first=Charles |title=US Marines in Vietnam High Mobility and Standdown 1969 |publisher=History and Museums Division Headquarters United States Marine Corps |year=1988 |isbn=9781494287627 |page=55}}</ref>
* On 10 May 1996, a CH-46E collided in mid-air with an [[Bell AH-1 SuperCobra|Bell AH-1W]] attack helicopter, killing fourteen (twelve Marines, one Navy sailor, and one Army soldier) aboard the two helicopters. The pilots of the CH-46E were injured. Both helicopters, of [[VMM-266|HMM-266]], were operating from [[USS Saipan (LHA-2)|USS ''Saipan'']] and were participating in Operation Purple Star, a joint exercise involving troops from the U.S. and the UK at [[Camp Lejeune]], North Carolina.<ref>{{cite news |url=https://www.nytimes.com/1996/05/11/us/mid-air-copter-collision-kills-14-marines-in-south.html |title=Mid-Air Copter Collision Kills 14 Marines in South |last=Smothers |first= Ronald |date=11 May 1996 |newspaper=The New York Times |access-date=27 July 2017}}</ref><ref>{{cite news |url=https://www.latimes.com/archives/la-xpm-1996-05-11-mn-2931-story.html |title=2 Marine Copters Collide in N.C.; 14 Dead, 2 Hurt |last1=Pine |first1= Art |last2=Harrison |first2= Eric |date=11 May 1996 |newspaper=Los Angeles Times |access-date=27 July 2017}}</ref><ref>{{cite news |url=http://www.cnn.com/US/9605/10/chopper.crash/ |title=Marine helicopters collide at Camp Lejeune; 14 dead |date=10 May 1996 |publisher=CNN |access-date=27 July 2017}}</ref><ref>{{cite news |url=https://apnews.com/2e45d4e30950816f4aea4ee9ce5a5427 |title=Marines continue investigating helicopter crash that killed 14 |last=Waggoner |first= Martha |work=Associated Press News |date=11 May 1996 |publisher=Associated Press |access-date=27 July 2017}}</ref>
* On 2 October 1998, a CH-113 Labrador crashed near [[Marsoui, Quebec]], after an inflight fire. All six crewmembers were killed.<ref>{{Cite web|url=https://aviation-safety.net/wikibase/24693|title=Accident Boeing Vertol CH-113 Labrador (CH-46A) 11305, 02 Oct 1998|first=Harro|last=Ranter|website=aviation-safety.net}}</ref>
* On 9 December 1999, a CH-46D Sea Knight BuNo 154790 of [[HMM-166]] crashed during a boarding exercise off the coast of San Diego, California, killing seven U.S. Marines. The pilot landed the CH-46 short on the deck of the [[USNS Pecos (T-AO-197)|USNS ''Pecos'']], causing the left rear tire and strut to become entangled in the safety netting at the back of the ship, which caused it to plunge into the ocean.<ref>[http://www.check-six.com/Crash_Sites/SeaKnight-USMC-1999.htm A Tailhook of a Different Kind...] check-six.com</ref>

==Aircraft on display==
[[File:V-107A-1.JPG|thumb|A KV-107 with the [[Japan Ground Self-Defense Force|JGSDF]] on display at the [[Kakamigahara, Gifu#Other|Kakamigahara Aerospace Museum]]]]
[[File:Boeing-Vertol 107 (Hkp-4B) 04064 64 (8315424775).jpg|thumb|A [[#Variants|HKP 4B]] of the [[Swedish Armed Forces]] on display at the [[Swedish Air Force Museum]], [[Malmen Airbase|Malmen]], [[Sweden]] ]]
A variety of CH-46 are on display at museums in Canada, Japan, Sweden, and the USA.
;Canada
* [[Canada Aviation and Space Museum]] – Labrador 11301<ref name=CAM />
* [[Comox Air Force Museum]] – Labrador 11310<ref>{{cite web|title=News |url=http://www.comoxairforcemuseum.ca/news.html |website=Comox Air Force Museum |access-date=10 July 2015 |url-status=dead |archive-url=https://web.archive.org/web/20100223045228/http://www.comoxairforcemuseum.ca/news.html |archive-date=23 February 2010}}</ref>
* [[National Air Force Museum of Canada]] – Labrador 11315<ref>{{cite web|title=Labrador|url=http://airforcemuseum.ca/en/aircraft-2/labrador|website=National Air Force Museum of Canada|access-date=10 July 2015|archive-url=https://web.archive.org/web/20150710214710/http://airforcemuseum.ca/en/aircraft-2/labrador|archive-date=10 July 2015|url-status=dead}}</ref>
* [[Greenwood Military Aviation Museum]] – Labrador 11308<ref>https://scontent-lga3-1.xx.fbcdn.net/t31.0-8/11008659_944480752269620_122700914447500486_o.jpg{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes}}</ref>

;Japan
* [[Hamamatsu Air Base|Japan Air Self Defense Force Hamamatsu Air Base Publication Center]], [[Hamamatsu]], [[Shizuoka Prefecture|Shizuoka]], Japan<ref>[https://www.mod.go.jp/asdf/airpark/kannai_syoukai/tenji_koukuuki/tenji_koukuuki.html Display aircraft] {{webarchive |url=https://web.archive.org/web/20080924052026/http://www.mod.go.jp/asdf/airpark/kannai_syoukai/tenji_koukuuki/tenji_koukuuki.html |date=24 September 2008}} JASDF Hamamatsu Air Base Publication Center</ref>
* Kakamigahara Aerospace Science Museum, [[Kakamigahara]], [[Gifu Prefecture|Gifu]], Japan<ref>[http://www.city.kakamigahara.lg.jp/museum/tenji/helicopter.html Display helicopters] {{webarchive |url=https://web.archive.org/web/20090428140951/http://www.city.kakamigahara.lg.jp/museum/tenji/helicopter.html |date=28 April 2009}} Kakamigahara Aerospace Science Museum</ref>
* Kawasaki Vertol 107-II – Kawasaki Good Times World, within [[Kobe Maritime Museum]], [[Kobe]], [[Hyōgo Prefecture|Hyōgo]], Japan.<ref>[http://www.khi.co.jp/kawasakiworld/english/ht_flash_e.html Museum Outline] Kawasaki Good Times World</ref><ref>{{cite web |url=http://chakkiri.com/aircraft_list/ja9555/index.html |title=JA9555 |publisher=Chakkiri.com |access-date=25 April 2014 |url-status=dead |archive-url=https://web.archive.org/web/20120310224648/http://chakkiri.com/aircraft_list/ja9555/index.html |archive-date=10 March 2012}}</ref>

;Sweden
* Aeroseum, Gothenburg, Sweden – Boeing Vertol/Kawasaki KV-107-II (CH-46), Hkp 4C, c/n 4093, Fv 04072 "72"<ref>[http://www.aeroseum.se/english/aircraft.html Aircraft at Museum] {{webarchive|url=https://web.archive.org/web/20150405031205/http://www.aeroseum.se/english/aircraft.html |date=5 April 2015}}. Aeroseum</ref>
* Swedish Air Force Museum, Linköping Sweden. Prototype BV-107-II N6679D. Bought used from Boeing in 1970.{{Citation needed|date=September 2022}}

;United States
[[File:CH46E Sea Knight.png|thumb|Last CH-46 of Marine Corps [[HMM-774]] at [[Steven F. Udvar-Hazy Center]]]]

* 153962, 154853, 155316, 154810, 157678, 157682 – National United States Armed Forces Museum in Houston, Texas displays four Marine Corps CH-46Es in various configurations including an HMX-1 aircraft and an HH-46E "Pedro" configured for search and rescue '01' from VMR-1 Cherry Point MCAS, NC.{{cn|date=November 2023}}
* 150954 – [[USS Midway Museum|USS ''Midway'' Museum]] in San Diego, California displays HH-46A (c/n 2040) as U.S. Navy SA-46 of [[HCS-3|HC-3]] on one side and VR-46 of [[HC-11]] on the other.{{cn|date=November 2023}}
* 151952 – [[National Museum of Naval Aviation]] in [[Pensacola, FL]] displays HH-46D (c/n 2102) as U.S. Navy HW-00 of [[HC-6]].{{cn|date=November 2023}}
* 153389 – [[Carolinas Aviation Museum]], [[Charlotte, North Carolina]], has [[Raymond Clausen]]'s [[Medal of Honor]] mission CH-46E (c/n 2287) as [[HMM-263]] EG-16.<ref>{{cite web|title=CH-46D Sea Knight|url=http://www.carolinasaviation.org/helicopters/ch-46c-sea-knight|website=Carolinas Aviation Museum|publisher=Evoke Creative Group|access-date=10 July 2015|archive-url=https://web.archive.org/web/20170801112640/http://www.carolinasaviation.org/helicopters/ch-46c-sea-knight|archive-date=1 August 2017|url-status=dead}}</ref> The rear fuselage of BuNo 153335 was used in restoration.
* 153986 – [[National Museum of the Marine Corps]] [[Quantico, Virginia]] has a walk-through exhibit containing the rear half of a CH-46D displayed as the former BuNo 153986 (c/n 2337) YK-13 from [[HMM-364]] with their logo, The Purple Fox.<ref>{{Cite web |title='Phrogs' retire as Corps transitions to Osprey |url=https://www.dvidshub.net/news/106333/phrogs-retire-corps-transitions-osprey |access-date=2023-10-15 |website=DVIDS |language=en}}</ref> The front half of the aircraft was used as a training aid display for HMX-1.<ref>{{cite web|url=http://www.marine-corps-news.com/2005/09/helicopter_halved_to_serve_as.htm|title=Marine Corps News Room: Helicopter halved to serve as museum exhibit, training aid|website= marine-corps-news.com|access-date=13 December 2014|archive-url=https://web.archive.org/web/20180928233028/http://www.marine-corps-news.com/2005/09/helicopter_halved_to_serve_as.htm|archive-date=28 September 2018|url-status=dead}}</ref><ref>{{cite web|url=http://www.hmm-364.org/all-years/swifty-finds.html|title=HMM-364 Squadron Logo|first=Franklin|last=Gulledge|website= hmm-364.org}}</ref>
* 153402 – [[New River Aviation Memorial]] at the front gate of [[Marine Corps Air Station New River]], (part of [[Camp Lejeune]]) in [[Jacksonville, North Carolina]] – CH-46E (c/n 2300) as YS-02 of [[HMM-162]] on one side and [[HMM-261]] on the other.<ref>{{cite web|url=http://www.jdnews.com/news/helicopter_56247___article.html/corps_marine.html |title='Phrog' honored by Corps for four decades of service |website=JDNews.com |publisher=Freedom Communications, Inc. |last1=Ulbrich |first1=Suzanne |access-date=10 July 2015 |url-status=dead |archive-url=https://web.archive.org/web/20080506153926/http://www.jdnews.com/news/helicopter_56247___article.html/corps_marine.html |archive-date=6 May 2008}}</ref><ref>{{cite news |last=Lingafelt |first=Jared |date=6 November 2014 |title=MV-22 dedicated to Aviation Memorial |url=http://www.camplejeuneglobe.com/news/mv--dedicated-to-aviation-memorial/article_32c2d6d2-652a-11e4-80c0-001a4bcf6878.html |newspaper=The Globe |location=Jacksonville, NC |access-date=12 December 2014 |archive-date=29 September 2018 |archive-url=https://web.archive.org/web/20180929122743/http://www.camplejeuneglobe.com/news/mv--dedicated-to-aviation-memorial/article_32c2d6d2-652a-11e4-80c0-001a4bcf6878.html |url-status=dead }}</ref>
* 153369 – [[National Air and Space Museum]] at the [[Steven F. Udvar-Hazy Center]] in [[Chantilly, Virginia]] has CH-46D (c/n 2265) displayed as MQ-400 of [[HMM-774]]. This aircraft is on loan from [[National Museum of the Marine Corps]], [[Quantico, Virginia]]. The aircraft was last flown on 1 August 2015 at the Marine Corps' formal sunset ceremony for the type which was the last public showing of an airworthy Marine Corps CH-46.<ref name="Pharwell">{{cite web |author=<!--Staff writer(s); no by-line.--> |date=16 July 2015 |title=Phrog Pharewell/ |url=http://blog.nasm.si.edu/aviation/phrog-farewell/ |access-date=21 October 2015 |website=nasm.si.edu |publisher=National Air and Space Museum}}</ref>
* 154009 – [[Patriots Point|Patriots Point Naval and Maritime Museum]] in [[Mount Pleasant, South Carolina]], has CH-46E (c/n 2360) of HMM-164.<ref>{{cite web|last1=Cordes|first1=Alaina|title=Patriots Point Adds 1967 CH-46D Helicopter|url=http://www.patriotspoint.org/news_events/patriots-point-adds-1967-ch-46d-helicopter|website=Patriots Point|access-date=10 July 2015|date=1 May 2014|archive-date=12 July 2015|archive-url=https://web.archive.org/web/20150712120544/http://www.patriotspoint.org/news_events/patriots-point-adds-1967-ch-46d-helicopter/|url-status=dead}}</ref>
* 154803 – [[Flying Leatherneck Aviation Museum]], [[San Diego]], California, USA has CH-46E (c/n 2410) as YS-09 ''Lady Ace 09'' of [[HMM-165]]. The CH-46 took part in [[Operation Frequent Wind]] and was used to evacuate Ambassador [[Graham Martin]], the last [[United States Ambassador to South Vietnam]] from the [[United States Embassy, Saigon]] on 30 April 1975.<ref>{{cite web |url=http://militaryaviationjournal.com/2012/03/hmm-165-lady-ace-09-dedication.htm |title=HMM-165 "Lady Ace 09" Dedication |last=Myers |first=Phil |publisher=Military Aviation Journal |date=31 March 2012 |website=militaryaviationjournal.com/ |access-date=12 December 2014 |archive-url=https://web.archive.org/web/20141213023247/http://militaryaviationjournal.com/2012/03/hmm-165-lady-ace-09-dedication.htm |archive-date=13 December 2014 |url-status=dead}}</ref>
* 156427 – Veterans Museum [[Dyersburg Army Air Base]] in [[Halls, Tennessee]] has YP-05, a CH-46E wearing the Evileyes of HMM-163.<ref>{{cite web|title=Veterans Museum welcomes new exhibit|url=http://www.stategazette.com/story/1792946.html|work=Dyersburg State Gazette|access-date=10 July 2015|date=9 December 2011|archive-date=10 July 2015|archive-url=https://web.archive.org/web/20150710151346/http://www.stategazette.com/story/1792946.html|url-status=dead}}</ref><ref>{{cite web|last1=Bowling|first1=Jimmie|title=Veterans' Museum|url=http://www.ch-46.com/#!veterans-museum/c1h8x|website=CH-46.com|publisher=Wix.com|access-date=10 July 2015|archive-url=https://web.archive.org/web/20150712102632/http://www.ch-46.com/#!veterans-museum/c1h8x|archive-date=12 July 2015|url-status=dead}}</ref> 
* 156469 – [[Pima Air & Space Museum|Pima Air and Space Museum]] in [[Tucson, Arizona|Tucson]], [[Arizona]]. Started life as a CH-46F, and was converted to the CH-46E standard sometime between 1975 and 1979. It is displayed as YP-12 of [[HMM-163]] "Evileyes" Scheme; accurate to this airframe.<ref>{{Cite web |title=Boeing-Vertol CH-46E |url=https://pimaair.org/museum-aircraft/boeing-vertol-ch-46e/ |access-date=2022-08-16 |website=Pima Air & Space |language=en-US}}</ref> (On loan from the [[National Museum of the Marine Corps]].) 
* 157688 – Classic Rotors Rotorcraft Museum in Ramona, CA. displays HH-46E '02' from VMR-1 Cherry Point MCAS N.C.

==Specifications (CH-46E)==
[[File:Boeing Vertol CH-46 Sea Knight Line Drawing.svg|thumb|upright=1.5]]
[[File:KV107 KASM084.jpg|thumb|CH-46 cockpit]]
[[File:EM DSC 1969 (2878398235).jpg|thumb|Cabin, looking towards cockpit]]
{{Aircraft specs
|ref= The International Directory of Military Aircraft, 2002/2003,<ref name=Frawley>{{cite book |last1=Frawley |first1=Gerald |title=The international directory of military aircraft 2002/03 |date=2002 |publisher=Aerospace Publications |location=Fyshwick, ACT, Australia |isbn=1-875671-55-2 |page=48 |edition=Rev. 4th}}</ref> The Complete Encyclopedia of World Aircraft : Boeing Vertol Model 107 (H-46 Sea Knight),<ref name=Donald_V-107>{{cite book |last1=Donald |first1=David |title=The Complete Encyclopedia of World Aircraft : Boeing Vertol Model 107 (H-46 Sea Knight) |date=1997 |publisher=Barnes & Nobel Books |location=New York |isbn=0-7607-0592-5 |page=175}}</ref> Encyclopedia of world military aircraft : Volume One<ref name="Donaldlake">{{cite book |last1=Donald |first1=David |last2=Lake |first2=Jon |title=Encyclopedia of world military aircraft : Volume One |date=1994 |publisher=Aerospace |location=London |isbn=1874023514 |pages=81–82}}</ref>
|prime units?=kts
<!--   General characteristics
-->
|crew=5: two pilots, one crew chief, one aerial gunner/observer, one tail gunner
|capacity=<br />
** 24 troops ''or''
** 15 stretchers and two attendants ''or''
** {{cvt|7000|lb}}
|length ft=44
|length in=10
|length note=(fuselage)
:::{{cvt|83|ft|4|in}} (rotors turning)
|span ft=
|span in=
|span note=
|upper span ft=
|upper span in=
|upper span note=
|mid span ft=
|mid span in=
|mid span note=
|lower span ft=
|lower span in=
|lower span note=
|swept ft=<!-- swing-wings -->
|swept in=<!-- swing-wings -->
|swept note=
|dia ft=<!-- airships etc -->
|dia in=<!-- airships etc -->
|dia note=
|width ft=<!-- if applicable -->
|width in=<!-- if applicable -->
|width note=
|height ft=16
|height in=9
|height note=to top of rear rotor head
|wing area sqft=
|wing area note=
|swept area sqft=<!-- swing-wings -->
|swept area note=
|volume ft3=<!-- lighter-than-air -->
|volume note=
|aspect ratio=<!-- sailplanes -->
|airfoil=
|empty weight lb=15537
|empty weight note=<ref name="Aviation Models: Boeing/Vertol CH-46 Sea Knight">{{cite web |title=Boeing/Vertol CH-46 Sea Knight |url=http://www.aviation-history.com/boeing/ch46.htm|publisher=Aviation Models|access-date=24 April 2018|date=4 November 2009}}</ref>
|gross weight kg=
|gross weight lb=24300
|gross weight note=
|max takeoff weight kg=
|max takeoff weight lb=24300
|max takeoff weight note=<ref name="Aviation Models: Boeing/Vertol CH-46 Sea Knight" />
|fuel capacity={{cvt|350|USgal|impgal l}} internal
|more general=
<!--   Powerplant
-->
|eng1 number=2
|eng1 name=[[General Electric T58-GE-16]]
|eng1 type=[[turboshaft]] engines
|eng1 shp=1870

|rot number=2
|rot dia m=<!-- helicopters -->
|rot dia ft=50
|rot dia in=<!-- helicopters -->
|rot area sqft=3926.99
|rot area note=<br />
*'''Rotor blade section:''' '''root:'''  Boeing VR-7; '''tip:''' Boeing VR-8<ref name="Selig">{{cite web |last1=Lednicer |first1=David |title=The Incomplete Guide to Airfoil Usage |url=https://m-selig.ae.illinois.edu/ads/aircraft.html |website=m-selig.ae.illinois.edu |access-date=16 April 2019}}</ref>
<!--   Performance
-->
|max speed kts=144
|max speed note=at sea level
|max speed mach=<!-- supersonic aircraft -->
|cruise speed kts=143
|cruise speed note=maximum at sea level
|stall speed kts=
|stall speed note=
|never exceed speed kts=
|never exceed speed note=
|minimum control speed kts=
|minimum control speed note=
|range nmi=550
|range note=with {{cvt|2400|lb}} payload
|combat range nmi=
|combat range note=
|ferry range nmi=600
|ferry range note=
|endurance=<!-- if range unknown -->
|ceiling ft=17000
|ceiling note=<br />
*'''Hover ceiling IGE:''' {{cvt|9500|ft}}
*'''Hover ceiling OGE:''' {{cvt|5750|ft}}
|g limits=<!-- aerobatic -->
|roll rate=<!-- aerobatic -->
|climb rate ftmin=1715
|climb rate note=
|time to altitude=
|disk loading lb/sqft=4.43
|disk loading note=
|fuel consumption lb/mi=
|power/mass={{cvt|0.215|hp/lb|kW/kg}}
|thrust/weight=

|more performance=
<!--   Armament
-->
|guns=Two door-mounted {{cvt|0.5|in|1|abbr=on}} [[M2 Browning Machine Gun#XM213/M213, XM218, GAU-15/A, GAU-16/A, and GAU-18/A|GAU-15/A machine guns]] (optional), one ramp-mounted [[7.62×51mm NATO|{{cvt|7.62|mm|2|abbr=on}}]] [[M240 machine gun#M240D|M240D machine gun]] (optional)
|bombs= 
|rockets= 
|missiles= 
|hardpoints=
|hardpoint capacity=
|hardpoint rockets=
|hardpoint missiles=
|hardpoint bombs=
|hardpoint other=

|avionics=
}}

==See also==
{{Portal|Aviation}}
[[File:Two CH-46 landing.jpg|thumb|Two CH-46 land]]
{{Aircontent
|see also=
|related=
* [[Boeing CH-47 Chinook]]
|similar aircraft=
* [[Piasecki HUP Retriever]]
* [[Sikorsky S-61]]
* [[Yakovlev Yak-24]]
|lists=
* [[List of active United States military aircraft]]
* [[List of military aircraft of the United States]]
* [[List of military electronics of the United States]]
}}

==References==
;Citations
{{Reflist}}

;Bibliography
{{Refbegin}}
* Andrade, John ''U.S.Military Aircraft Designations and Serials since 1909''. Midland Counties Publications, 1979. {{ISBN|0-904597-22-9}}.
* Andrade, John. ''Militair 1982''. London: Aviation Press Limited, 1982. {{ISBN|0-907898-01-7}}.
* Dunstan, Simon. ''Vietnam Choppers: Helicopters in Battle 1950–1975'', Osprey Publishing, 2003. {{ISBN|1-84176-796-4}}.
* Murray, Williamson and Robert H. Scales. ''The Iraq War''. Harvard University Press, 2005. {{ISBN|0-67450-412-7}}.
* Rottman, Gordon and Adam Hook. ''Vietnam Airmobile Warfare Tactics''. Osprey Publishing, 2007. {{ISBN|1-84603-136-2}}.
{{Refend}}

==External links==
{{Commons}}
* [https://web.archive.org/web/20041105115035/https://wrc.navair-rdte.navy.mil/warfighter_enc/aircraft/Helos/Cknight.htm CH-46D/E Sea Knight] and [https://web.archive.org/web/20071203202119/http://www.history.navy.mil/planes/ch46.htm CH-46 history pages on U.S. Navy site]; [https://web.archive.org/web/20080128062022/http://hqinet001.hqmc.usmc.mil/AVN/documents/aircraft/rotarywing/ch46.htm CH-46 page on USMC site]
* [https://web.archive.org/web/20071120235437/http://www.boeing.com/rotorcraft/military/ch46e/index.html CH-46 product page] and [https://web.archive.org/web/20071126131436/http://www.boeing.com/history/boeing/seaknight.html CH-46 history page on Boeing.com]
* [https://web.archive.org/web/20090513082418/http://www.colheli.com/ Columbia Helicopters — Largest Civilian Operator of BV/KV Model 107]
* [https://web.archive.org/web/20071030100550/http://www.ody.ca/%7Ebwalker/CAF_Vertols_detailed_list.htm Detail List of CH-113 Labradors & Voyageurs]
* [https://web.archive.org/web/20080618183512/http://www.khs-sa.com/ Kawasaki Helicopter Services (S.A.) Ltd.]
* [https://www.silverhawkauthor.com/post/canadian-warplanes-7-boeing-vertol-ch-113-labrador-and-ch-113a-voyageur-helicopter Canadian Warplanes 7: Boeing Vertol CH-113 Labrador and CH-113A Voyageur helicopter]
{{Navboxes
|title=Articles and topics related to the Boeing Vertol CH-46 Sea Knight
|state=collapsed
|list1=
{{CH-47 Chinook family}}
{{Boeing Helicopters model numbers}}
{{Boeing rotorcraft}}
{{US Army helicopters}}
{{USAF helicopters}}
{{USN helicopters}}
{{USAF system codes}}
{{CF aircraft}}
{{Swedish military aircraft designations}}
}}
{{Authority control}}

{{DEFAULTSORT:CH-46 Sea Knight}}
[[Category:United States military helicopters|Boeing CH-46 Sea Knight]]
[[Category:Tandem rotor helicopters]]
[[Category:1950s United States military transport aircraft]]
[[Category:Boeing aircraft]]
[[Category:Aircraft with fixed tricycle landing gear]]
[[Category:1960s United States helicopters]]
[[Category:Twin-turbine helicopters]]
[[Category:Aircraft first flown in 1958]]
[[Category:Vertol aircraft|CH-46]]