single 20 mm

Used by

Year	Type	Class	Qty
1943	Aircraft Carrier	Casablanca class	20
1944	Aircraft Carrier	Colossus class	32
1944	Icebreakers	Wind class	6
1960	Frigate	Type 12 Rothesay class	2
1961	Frigate	Type 81 Tribal class	2
1962	Guided-Missile Destroyer	County class	2
1965	Landing Ship/Platform Dock	Fearless class	2
1965	Support Ship	OL class	2
1967	Support Ship	Endurance (1967)	2
1967	Guided-Missile Destroyer	Suffren class	4
1973	Guided-Missile Destroyer	Type 82 Bristol class	2
1974	Frigate	Type 21 Amazon class	2
1974	Destroyer	F67 Tourville class	2
1976	Corvette	d'Estienne d'Orves class	2
1978	Support Ship	Fort I class (1978)	2
1978	Corvette	Drummond class	2
1979	Support Ship	Aris class	4
1980	Coast Guards	Anaga class
1980	Aircraft Carrier V STOL	Invincible class	2
1981	Coast Guards	Nordkapp class	4
1983	Frigate	Type 22 (Batch 2) Boxer class	2
1983	Support Ship	Reliant class (1983)	4
1984	Corvette	Eithne class	2
1987	Helicopter Carrier	Argus class	2
1987	Support Ship	Drakensberg class	4
1988	Guided-Missile Destroyer	F70 AA class	2
1991	Frigate	Karel Doorman class
1991	Frigate	Thetis class
1992	Support Ship	Fort II class (1992)	2
1992	Frigate	Floreal class	2
1993	Support Ship	404 Elbe class	2
1994	Frigate	F 123 Brandenburg class	2
1996	Frigate	La Fayette class	2
1998	Landing Ship/Platform Dock	Rotterdam class	4
1998	Assault Carrier	Ocean class	4
2003	Landing Ship/Platform Dock	Albion class	2
2003	Support Ship	Echo class	2
2008	Guided-Missile Destroyer	Horizon class	2
2010	Assault Carrier	Buque de Proyeccion Estrategica class	4
2012	Corvette	Gowind class

Refits

Date	Ship	Class	Event
May 31, 1982	RFA Reliant A131	Reliant class (1983)	taken up from trade as mv Astronomer and entered rapid refit to provide helicopter support facilities, until 7 Jun 1982.
Jun 1982	HMS Hecate A137	Hecla class	Repaint o/a Pussers Grey and fitted with 2x 20mm guns, in preparation for South Atlantic deployment