The Sentinel-class cutter, also known as the Fast Response Cutter due to its program name, is part of the United States Coast Guard Deepwater program. At 154 feet (46.8 m), it is similar to, but larger than, the 123-foot (37 m) lengthened 1980s-era Island-class patrol boats that it replaces. Up to 66 vessels are to be built by the Louisiana-based firm Bollinger Shipyards, using a design from the Netherlands-based Damen Group, with the Sentinel design based on the company Damen Stan 4708 patrol vessel. The Department of Homeland Security budget proposal to Congress, for the Coast Guard, for 2021, stated that, in addition to 58 vessels to serve the Continental US, they requested an additional six vessels for its portion of Patrol Forces Southwest Asia.