45ft Watson-class lifeboat

	45ft Watson-class RNLB B.A.S.P. (ON 687) in the RNLI Heritage Collection at Chatham Historic Dockyard.
Class overview
Name	45ft Watson-class
Builders	S. E. Saunders Cowes; J. Samuel White Cowes; Thames Ironworks and Shipbuilding Company Blackwall, London; Summers & Payne, Southampton;
Operators	Royal National Lifeboat Institution
Preceded by	various
Succeeded by	45ft 6in Watson-class
Cost	£6,000–£8,500
Built	(1912), 1919–1925
In service	1912–1956
Completed	22
Lost	1
Retired	21
General characteristics
Class & type	45ft Watson-class motor lifeboat
Length	45 ft (14 m)
Beam	12 ft 6 in (3.81 m)
Propulsion	1 x 60-bhp Tylor D1 4-cyl petrol; 1 x 80-bhp Weyburn DE6 6-cyl petrol;
Speed	8 knots (15 km/h; 9.2 mph)
Range	125 nmi (232 km; 144 mi)
Crew	8–12

The 45 ft Watson-class was a non self-righting displacement hull lifeboat built between 1919 and 1925, and operated by the Royal National Lifeboat Institution between 1919 and 1956.