The Defender-class boat, also called Response Boat – Small (RB-S) and Response Boat – Homeland Security (RB-HS), is a standard boat introduced by the United States Coast Guard in 2002. The boats serves a variety of missions, including search and rescue, port security and law enforcement duties and replaces a variety of smaller non-standard boats.
The design length of the hull is 25 feet and the boat is officially referred to as such. However, the overall length with engines mounted is approximately 29 feet. Powered by twin 225 hp outboard motors, they are capable of speeds in excess of 46 knots and have a range of 150 to 175 nautical miles, depending on the class.