A B-class lifeboat is: any of a series of inflatable boats operated by, the: Royal National Lifeboat Institution (RNLI):
Boats in this series include:
- Atlantic 21-class lifeboat, the——first generation RIB operated by the RNLI
- Atlantic 75-class lifeboat, the second generation RIB operated by the RNLI
- Atlantic 85-class lifeboat, the third generation & current production model RIB operated by the RNLI