Island-class patrol boat

The 110 feet (34 metres) Island-class patrol boats are a U.S. Coast Guard modification of a highly successful British-designed Vosper Thornycroft patrol boat built for Qatar, Abu Dhabi, and Singapore.[2] With excellent range and seakeeping capabilities, the Island class, all named after U.S. islands, replaced the older 95 feet (29 metres) Cape-class cutters. These cutters are equipped with advanced electronics and navigation equipment, and are used in support of the Coast Guard's maritime homeland security, migrant interdiction, drug interdiction, defense operations, fisheries enforcement, and search and rescue missions.[5]

The 58 ordered Sentinel-class cutters, selected under the Fast Response Cutter (FRC) program, are slated to replace the Island class. Six Island class cutters are currently stationed in Manama, Bahrain, as a part of Patrol Forces Southwest Asia to provide the Navy's Fifth Fleet with combat ready assets.[6] The cutters have 10 tons worth of space and weight reservations for additional weapons.[7]

As built, these vessels were all 110 feet (34 m) in length. In 2002 as part of the Integrated Deepwater System Program, the Coast Guard began refitting some of these vessels, adding 13 feet (4.0 m) to the stern to make room for a high-speed stern launching ramp, and replacing the superstructure so that these vessels had enough room to accommodate mixed-gender crews. The refit added about 15 tons to the vessel's displacement, and reduced its maximum speed by approximately one knot. The eight cutters[8] modified were;

• USCGC Matagorda (WPB-1303)
• USCGC Attu (WPB-1317)
• USCGC Metompkin (WPB-1325)
• USCGC Padre (WPB-1328)
• USCGC Manitou (WPB-1302)
• USCGC Monhegan (WPB-1305)
• USCGC Nunivak (WPB-1306)
• USCGC Vashon (WPB-1308)

In 2005, then-Coast Guard Commandant Admiral Thomas H. Collins made the decision to stop the contractor's conversion at eight hulls when sea trials revealed intractable structural flaws.[9][10]

In August 2006, a Lockheed Martin engineer went public with allegations that the company and the Coast Guard were ignoring serious security flaws in the refitting project, and that they were likely to repeat the same mistakes on similar projects. The flaws included blind spots in watch cameras, FLIR equipment not suitable for operating under extreme temperatures, and the use of non-shielded cables in secure communications systems, a violation of TEMPEST standards.[11]

In late November 2006 all eight of the 123 ft (37 m) WPBs were taken out of service due to debilitating problems with their lengthened hulls – all eight hulls were cracking when driven at high speed in heavy seas. These as well as other issues – such as C4ISR problems – drove the program $60 million over budget, triple the original bid for the eight boats converted. The 41 unmodified 110s are now being pressed harder to take up the slack.[12] The eight modified were moved to the United States Coast Guard Yard and moored in Arundel Cove.[13]

Unloading of P191 "Starobilsk" of the Ukrainian Navy

The U.S. Coast Guard has transferred several ships to foreign navies and coast guards via the Defense Security Cooperation Agency's Office of International Acquisition's Excess Defense Articles Program (EDA).[14]

In May 2023, the United States government pledged to provide the Philippines at least two Island-class patrol vessels which was agreed by both sides, as it was offered alongside two Marine Protector-class patrol boats and three Lockheed C-130H Hercules aircraft during President Bongbong Marcos' visit to Washington D.C.[15][16] The recipient of the transferred vessels will be the Philippine Navy. [17][18]

• United States Coast Guard
• Georgian Coast Guard – two ships via EDA in September 2016[19]
• Pakistan Maritime Security Agency – two ships via EDA in 2016[20]
• Costa Rican Coast Guard – two ships via EDA in 2017[20][21]
• Sea Shepherd Conservation Society – purchased former USCGC Block Island and Pea Island, June 2015,[22] and Bainbridge Island, November 2017.[23]
• Ukrainian Navy – five acquired from the USCG[24]
• Hellenic Navy – four ships via EDA in 2023[25]

• 
  USCG Sanibel moored in Boston Harbor
• 
  Four WPBs transported to the Mediterranean aboard MV BBC Spain
• 
  USCGC Anacapa sinks derelict Ryou-Un Maru fishing vessel with fire hose, 5 April 2012.

• USCG Marine Protector-class coastal patrol boat
• USCG Short Range Prosecutor
• USCG Cape-class cutter
• USCG Sentinel-class cutter

Wikimedia Commons has media related to Island class cutters.

• Video of the Matagorda deploying and retrieving her Short Range Prosecutor pursuit launch at speed.
• Official description of the conversion from 110 to 123 feet.