The Atlantic 75 is part of the B-class of lifeboats that serve the shores of the United Kingdom as a part of the RNLI inshore fleet. The Atlantic 75 is the second generation Rigid Inflatable Boat (RIB) in the B-class series, developed from the Atlantic 21. These boats gradually replaced the Atlantic 21 fleet, but have now been superseded by the new Atlantic 85-class lifeboat.