twin 40 mm

Used by

Year	Type	Class	Qty
1943	Aircraft Carrier	Casablanca class	8
1945	Support Ship	Shenandoah class	4
1953	Frigate	Prestonian class
1954	Aircraft Carrier	Modified Centaur class	2
1956	Frigate	Ikazuchi class	2
1956	Destroyer	Harukaze class	4
1956	Frigate	Akebono class	2
1957	Frigate	Centauro class	2
1958	Destroyer	Impetuoso class	4
1959	Aircraft Carrier	Improved Centaur class	5
1961	Frigate	F 120 Köln class	2
1964	Destroyer	Type 101 Hamburg class	4
1969	Helicopter Carrier	Vittorio Veneto class	3
1970	Corvette	Joao Coutinho class	2
1970	Frigate	Chikugo class
1972	Landing Ship/Platform Dock	Atsumi class	2
1975	Landing Ship/Platform Dock	Miura class
1978	Corvette	Descubierta class
1978	Corvette	Drummond class
1981	Frigate	Ulsan class	3
1982	Frigate	Maestrale class	2
1982	Corvette	Esmeralda class
1983	Destroyer	MEKO 360H2 class	4
1983	Corvette	Almirante Padilla class
1985	Corvette	MEKO 140A16 class	2
1994	Landing Ship/Platform Dock	Jason class	2