Ramsgate-class lifeboat

Class overview
Name	Ramsgate-class
Builders	S. E. Saunders, Cowes; J. Samuel White, Cowes;
Operators	Royal National Lifeboat Institution; ADES Uruguay; Bote Salvavidas de Valparaiso, Chile;
Preceded by	Norfolk and Suffolk-class
Succeeded by	46ft 9in Watson-class
Cost	£8,500
Built	1925–1928
In service	1925–1955
Completed	3
Retired	3
General characteristics
Displacement	21–23 tons
Length	ON 697: 48 ft (15 m); ON 704/5: 48 ft 6 in (14.78 m);
Beam	13 ft (4.0 m)
Propulsion	ON 697: 1 x 80 bhp Weyburn DE6 6-cyl. petrol; ON 704/5: 2 x 40 bhp Weyburn CE4 4-cyl. petrol;
Speed	8 knots (9.2 mph)
Crew	9

The Ramsgate-class motor lifeboat was a special design produced by the RNLI for three stations covering the Thames estuary and required to operate in shallow waters.