Cutter Boat – Over the Horizon

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An over the horizon boat from the USCGC Reliance

The Cutterboat - Over the Horizon (CB-OTH), is a cutter deployed rigid-hulled inflatable boat in service with the United States Coast Guard. It is designed to pursue and interdict fast, non-compliant vessels. As of 1 March 2018, 78 boats have been delivered, and deployed on a variety of cutters, including the Maritime Security Cutters, Hamilton class High Endurance Cutters, and Famous and Reliance class Medium Endurance Cutters, and the Sentinel class cutters.[1] Eventually, at least 101 boats will be deployed.[2]


Maritime Safety and Security Team members aboard an OTH boat. Note the black sponson and M240B machine gun.

The Over the Horizon boat is 24.75 feet in length. Its 4th generation is manufactured by SAFE Boats International of Port Orchard, Washington. It is part of a 101 boat order worth up to $58.9 million. The hull is fabricated 5086 marine grade aluminum and it has a 22-inch-diameter (560 mm) foam collar. It is an inboard/outboard design powered by a 500 hp Cummins Diesel inboard with Hamilton jet drive.[3][4]

The boats are equipped with radar, electronic compass, GPS, and other electronic navigation systems, loud-hailer, and both HF and VHF-FM radios.[3] The boats come equipped with five special shock-absorbing seats, necessary because proceeding at high-speed, over waves, could injure crew-member's spines.

A version of the boat with an all-black sponson and forward machine gun mount is used by Maritime Safety and Security Teams and the Maritime Security Response Team.


This cutterboat was photographed through the open door of the Bernard Webber's stern launching ramp.

The Coast Guard's newer cutters, the National Security Cutter, Sentinel cutter, and the smaller Marine Protector cutter are designed with a stern launching ramp. Stern launching ramps permit the cutters to deploy and retrieve water-jet propelled boats, without first coming to a stop. The Marine Protector cutters require just a single crew member to remain on deck to control the deployment and retrieval of its jet boat.

See also[edit]


  1. ^ "U.S. Coast Guard Orders Six Over-The-Horizon Cutter Boats". DefPost. 2018-03-01. Retrieved 2018-03-01. Seventy-eight OTH-IVs have been delivered, including boats for the first seven Legend-class cutters (National Security Cutter, NSC) and the first 28 Sentinel-class cutters (Fast Response Cutter, FRC).
  2. ^ "Acquisition Update: Coast Guard Orders Six Over-The-Horizon Cutter Boats" (PDF). US Coast Guard. 2013-02-06. Retrieved 2018-03-01. Under the current contract, up to 101 OTH-IV cutter boats may be ordered over a seven year period.
  3. ^ a b "Cutterboat -- Over the Horizon (CB_OTH) Mk III Operator's Handbook" (PDF). US Coast Guard. January 2008. Archived from the original (PDF) on 2018-03-02. Retrieved 2018-03-01.
  4. ^ US Coast Guard Retrieved 2018-03-01. Missing or empty |title= (help)[dead link]