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Class overview
Name	C-class
Builders	Zodiac Marine & Pool, France
Operators	Royal National Lifeboat Institution
Preceded by	D-class (RFD PB16)
Succeeded by	B-class (Atlantic 21); D-class (EA16);
General characteristics
Length	17 ft 6 in (5.33 m)
Beam	8 ft (2.4 m)
Propulsion	2 x 40 hp Mariner outboard engines
Speed	>26 knots (30 mph)
Complement	4

A C-class lifeboat usually refers to the Zodiac Grand Raid Mark IVs lifeboats, powered by twin 40 hp outboard motors, manufactured by Zodiac Marine & Pool of France, and which were operated by the Royal National Lifeboat Institution.

They were initially designated as D-class lifeboats, starting a series of boats numbered from D-500, but this was subsequently changed to C-class, to signify the difference between the twin engine C-class and the single engine D-class.^[1]

In 1970, the first lifeboats to be classed as C-class were twin engine RIBs, which were developed to be the Atlantic series lifeboats, and were re-designated B-Class. C-1 was renumbered as B-3, C-2 became B-4 etc.^[1]

The C-class Zodiac Grand Raid IV was replaced by both the D-class (EA16) and the B-class (Atlantic 21) inshore lifeboats.^[2]

Fleet

Op. No.^[a]	Name	In Service^[1]	Station
B-3 (Ex C-1)	Unnamed	1970 1971	Littlestone-on-Sea Atlantic College
B-4 (Ex C-2)	Unnamed	1971–1974 1974–1976 1978	Helensburgh Littlestone-on-Sea Helensburgh
B-5 (Ex C-3)	Unnamed	1972–1974 1976–1978	Littlestone-on-Sea Helensburgh
B-6 (Ex C-4)	Unnamed	1973 1974–1976	Lymington Helensburgh
B-7 (Ex C-5)	Unnamed	1974 1981–1984	Helensburgh Tynemouth Boarding Boat
B-8	Unnamed	1975 1977	Poole Poole
(D-500)	Unnamed	1972–1974 1974–1979 1979–1981	Trials Minehead Relief fleet
(D-501)	Unnamed		Trials only
C-502 (Ex D-502)	John Gilpin	1973–1975 1975–1977 1977–1983 1983–1985 1985–1988	Trials Silloth Relief fleet Boarding Boat Inshore Lifeboat Centre
C-503 (Ex D-503)	Unnamed	1973–1977 1977–1979 1979–1983 1983–1987	Trials Silloth Training fleet Boarding Boat
C-504 (Ex D-504)	Unnamed	1973–1978 1978–1987	Trials Inshore Lifeboat Centre
C-505 (Ex D-505)	Unnamed	1979–1986 1986–1987 1987 1987–1989 1990	St Abbs Red Bay Relief fleet Clifden Arran (Lamlash)
C-506 (Ex D-506)	Unnamed	1980–1986 1987–1988 1988–1993 1993–1997	Portaferry Arran (Lamlash) Relief fleet Boarding Boat
C-507 (Ex D-507)	Unnamed	1981–1988 1988–1990	Mudeford Relief fleet
C-508 (Ex D-508)	The Chris Pirson	1981–1992 1992–1996	Relief fleet Boarding Boat
C-509 (Ex D-509)	Oats	1983–1993 1993–1994 1994–1995 1995–1996 1996–1998	Aberystwyth Relief fleet Newquay Tighnabruaich Relief fleet
C-510 (Ex D-510)	Unnamed	1983–1991 1991–1995	Criccieth Relief fleet
C-511 (Ex D-511)	Unnamed	1984–1994 1994–1996 1996–2008	Newquay Relief fleet Boarding Boat
C-512 (Ex D-512)	Unnamed	1984–1991 1991–1996	Cullercoats Relief fleet
C-513	Sebag of Jersey	1984–1990 1990–1993 1993 1993–1996 1997–	St Catherine Relief fleet Criccieth Relief fleet Boarding Boat
C-514	Unnamed	1985–1995 1995–1997 1997–1998 1998	Kinghorn Relief fleet Clifden Inshore Lifeboat Centre
C-515	Unnamed	1985–1995 1995	St Bees Inshore Lifeboat Centre
C-516	Belsize Charitable Trust No.1	1986–1995 1995–1996	St Ives Relief fleet
C-517	Unnamed	1986–1996 1996–1997 1997–2008	Rye Harbour Relief fleet Boarding Boat
C-518	Unnamed	1987–1997	Cardigan
C-519	Thomas Corbett	1987–1995 1995–1996 1996–1997	Red Bay Relief fleet Tighnabruaich
C-520	Unnamed	1988–1996 1996–1999	Relief fleet Boarding Boat
C-521	Prince of Arran	1988–1998	Arran (Lamlash)
C-522	Unnamed	1989–1997 1997 1998–	Clifden Boarding Boat Publicity
C-523	British Diver IV	1990–1991 1991–1993 1993–1994 1994–1995 1995–1996 1996–1998	Relief fleet Criccieth Relief fleet Tighnabruaich Red Bay Relief fleet

^ Op. No. is the RNLI's Operational Number of the boat carried on the hull.

References

^ ^a ^b ^c Leonard, Richie; Denton, Tony (2024). Lifeboat Enthusiasts Handbook 2024. Lifeboats Enthusiasts Society. pp. 4–132.
^ Jenkins, David. "Inshore rescue - three miles from the sea!". Archived from the original on 22 October 2014. Retrieved 6 March 2013.