CB90-class fast assault craft

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For CB 90 E, see Storebro SB90E.
Stridsbåt 90.jpg
Combat Boat 90
Class overview
Builders: Dockstavarvet, Gotlandsvarvet
Operators: Swedish Navy, Royal Norwegian Navy, Royal Malaysian Navy, Mexican Navy, Brazilian Army, United States Navy
Preceded by: Tpbs 200
In commission: 1991
Completed: 250–300
General characteristics
Displacement: 13,000 kg (28,660 lbs) Empty, 15,300 kg (33,730 lbs) Standard, 20,500 kg (45,190 lbs) Full load
Length: 15.9 m (52 ft) Overall
14.9 (48') Waterline
Beam: 3.8 m (12 ft 6 in)
Draught: 0.8 m (2 ft 7 in)
Propulsion: 2 × 625 bhp Scania DSI14 V8 Diesel; 2 × Kamewa FF water jets
Speed: 40 knots (74 km/h)
Range: 240 nmi (440 km) at 20 knots (37 km/h)
Complement: 3 (two officers and one engineer)
Up to 21 amphibious troops with full equipment
Armament: 3 × Browning M2HB machine guns
1 × Mk 19 grenade launcher
4 naval mines or 6 depth charges

Stridsbåt 90 H(alv) (Strb 90 H, literally: Combat Boat 90 Half; the 90 refers to the year of acceptance and Half refers to the fact that it can carry and deploy a half platoon of amphibious infantry (18 men)[1] fully equipped) is a class of fast military assault craft originally developed for the Swedish Navy by Dockstavarvet. In addition to the many variants in service with the Swedish Navy under the "Stridsbåt 90H" designation, the CB 90 has been adopted by the navies of several countries, including Norway (as the S90N), Greece, Mexico (as the CB 90 HMN), and Malaysia. Also the German Navy plans to equip the Berlin-class replenishment ships with the CB90.[citation needed]

The CB90 is an exceptionally fast and agile boat that can execute extremely sharp turns at high speed, decelerate from top speed to a full stop in 2.5 boat lengths, and adjust both its pitch and roll angle while under way. Its light weight, shallow draught, and twin water jets allow it to operate at speeds of up to 40 knots (74 km/h) in shallow coastal waters. The water jets are partially ducted, which, along with underwater control surfaces similar to a submarine's diving planes gives the CB90 its manoeuvrability.

History[edit]

In 1988, Dockstavarvet won a competition to design and manufacture a replacement for the aging Tpbs 200 class. Two prototypes, with pennant number 801 and 802, were delivered in 1989. After completion of field trials, the Swedish Navy signed a purchase order for 120 boats in June 1990.

In 2002, the Swedish Navy ordered an additional 27 boats of a slightly different type, designated Stridsbåt 90 HS - where S refers to Skydd (protected)[1] as the Strb 90 HS is armoured and features CBRN protection (the whole boat can be over-pressurized) - intended for use in international peace-keeping operations. Apart from the addition of armour, it sports air-condition for deployment in tropical conditions, fuel cooling system, 220V generator and more powerful engines. The manufacturer sometimes refers to the model as the CB 90 HI, where the I probably stands for International.

Several of the tasks carried out by the Strb 90 H-variants, were originally intended for the Strb 90 E, which is now almost completely phased out.

The Royal Norwegian Navy evaluated the Strb 90 H in early 1996, and subsequently purchased a total of 20 boats, designated 90 N (for Norsk utgave, literally Norwegian version).

The Mexican Navy acquired 40 units (designated CB 90 HMN) between 1999 and 2001, and obtained a production license in 2002, allowing further units to be manufactured in Mexico. Since then eight additional units have been built.

The German Water Police rented a Combat Boat 90H from the manufacturer Dockstavarvet for the 33rd G8 summit in Heiligendamm, Germany. This boat was involved in a high speed chase with three Greenpeace RIBs which were trying to enter the restricted area near the hotel where the meeting was being held. A video clip of the incident was later widely spread around the internet.[2][3]

In July 2007 The United States Navy Expeditionary Combat Command (NECC) specified the CB90 for testing as its Riverine Command Boat. Safeboat International of Port Orchard, Washington, was given a US$2.8 million contract to produce one prototype.

In June 2009 an unknown buyer from Abu Dhabi bought two civilian luxury versions.[4]

In 2010, Dockstavarvet Shipyard modified two CB90's to be carried in the davits of Dutch and UK Navy Landing Platform Dock's. During these six months trials, the two boats and a full Swedish boat squadron will be embarked on a Royal Netherlands Navy LPD as a fully integrated element of the amphibious forces aboard and be deployed.

In 2013 JSC Pella Shipyard near St Petersburg launched the first Russian built Project 03160 "Raptor",[5] but while the ships are strikingly similar there is no indication Dockstavarvet has been involved or licensed the design to Pella.

Versions[edit]

Two .50 cal heavy machine guns seen here in front of the helmsman's position
Royal Norwegian Navy S90N

Several Strb 90 H have been converted by the Swedish Navy to fill various roles:

  • The Strb 90 L is outfitted for battalion-level command and control, with computer and communications equipment and an auxiliary generator to provide electrical power when the engines are not running. The L stands for ledning (command or leadership).
  • The Strb 90 KompL is a plain Strb 90 H in which portable computer and communications equipment has been installed, allowing it to temporarily provide company-level command and control. Electrical power is provided by a rather loud portable generator installed on deck.
  • The Strb 90 HS is designed for overseas peace-keeping and rescue operations. It is modified to keep its crew comfortable in Mediterranean conditions, with air conditioning, an auxiliary generator, a head, and more comfortable crew stations. More importantly, it is armored, and its engines have been upgraded to compensate for the added weight.
  • At least one Strb 90 H, pennant number 802, is equipped with a decompression chamber.
  • The Swedish Police operate one unarmed Strb 90 H equipped with bunks, a pantry and a crew lounge.
  • The Swedish Sea Rescue Society operates two unarmed Strb 90 Hs converted for search and rescue.
  • Hellenic Coast Guard operate also since 1998 three CB90 under the CB90HCG which is a slightly different version of the Norwegian Navy Version

The Royal Norwegian Navy operates 20 CB90s under the designation SB90N; the N simply stands for Norsk utgave (Norwegian version). The S90N differs from the Strb 90 H in a few areas:

  • It is armed with only one 12.7 mm machine gun, instead of three.
  • The anchor winch is motorized, and the anchor is mounted at the stern, allowing a grounded S90N to tow itself afloat rather than risk damage to its impellers.
  • It carries an auxiliary generator which provides electrical power to navigation and communications systems even when the engines are not running.
  • The "Troops transportation room" has a higher deck height, making it possible for most people to stand without crouching.
  • It has two water tight compartments in the bow, having an extra room for toilet and stores.
  • It has a much more sophisticated navigation equipment based on GPS-technology delivered by Kongsberg Seatex AS.[6]

At least one S90N has been reconfigured into a floating ambulance.

In 2004, the Royal Norwegian Navy conducted tests (including a live fire exercise) to evaluate the effectiveness of the SB90N as an aiming and launching platform for the Hellfire missile. One SB90N was equipped with stabilized Hellfire-launcher based on the Protector (RWS), and its machine gun was replaced with a gimbal-mounted sensor package containing visible-light and infrared cameras and a laser designator. Although the tests were successful, there is currently no indication that the Royal Norwegian Navy will actually deploy SB90Ns armed with Hellfire missiles in regular service. The Hellfire can still be carried on the boats without launching platforms and be fired from shore with the Portable Ground Launch System.

Accidents involving CB90s[edit]

On the night of October 23, 2006, a CB90 sank off of Hamnudden, east of Utö in the Stockholm archipelago. The boat was traveling at 11 knots (20 km/h) due to the bad weather when it suddenly began to take on water from the bow. It then sank in less than ten minutes. All of the crew of 16 were quickly picked up by other ships that were nearby. No one was physically injured, but the crew suffered from shock and hypothermia when picked up.

On June 13, 2004, several Strb 90 H from the Swedish Navy's first amphibious regiment (AMF1) were sailing at high speed in convoy formation when one of them abruptly reduced speed (allegedly so its wake would not upset a smaller sailboat). The boat immediately behind it failed to react and rammed it. Two soldiers who were above deck at the time of the accident were thrown in the water; one was killed instantly, and the other sustained severe injuries from which he died later the same day.

In mid-1999, one CB90 (No. 820) belonging to the 2nd Coastal Artillery Regiment (KA2) of the Swedish Navy crashed into a concrete pier at approximately 30 knots (56 km/h). There were eight soldiers on board; seven of these men sustained more or less severe injuries, including fractures, while one soldier who remained physically unhurt was standing in the machine gun ring-mount on mid-deck.

On October 5th, 2014, a Royal Malaysian Navy's CB90 bearing registration number CB204 was reported lost at sea due to storm and high tides. There were seven crewmen onboard. The boat was last detected at 1.05pm some 57 nautical miles off Labuan Island. The boat was found on October 6th near Station Lima, after its distress call was heard by KD Paus, a Jerung-class gunboat, with no injuries to all 7 crew. It was reportedly caused by engine and steering problems.

Operators[edit]

US Navy Riverine Squadron small unit riverine craft (left) and a Riverine Command Boat (right), 2011
 Greece
Hellenic Coast Guard: 3
 Malaysia
Malaysian Navy: 5 unit CB90, 12 unit CB90HEX, mostly station in East Malaysia (Sabah & Sarawak)
 Mexico
Mexican Navy: 48
 Norway
Royal Norwegian Navy: 20
 Sweden
Royal Swedish Navy: 200
 United States
US Navy: 6, known as 'Riverine Command Boat'[7][8]

Related development[edit]

References[edit]

  1. ^ a b "Stridsbåt 90 H - Försvarsmakten". Forsvarsmakten.se. 2013-09-18. Retrieved 2013-11-16. 
  2. ^ SvD article
  3. ^ Greenpeace-Boote dringen in G-8-Sperrzone ein
  4. ^ Di article[dead link]
  5. ^ Finishing trials of fast special-purpose boat (Rus)
  6. ^ "The Royal Norwegian Navy is acquiring Navigation Equipment Package for Combat Boat 90". November 23, 2013. 
  7. ^ Andrew Scutro (August 2, 2007). "New riverine boats are fast, lethal, flexible". Navy Times. Retrieved 2010-11-15. 
  8. ^ "Image 090925-N-9095H-025.jpg". US Navy News. September 25, 2009. Retrieved 2010-11-15. [dead link]

External links[edit]