twin 40 mm Naval Gun

Used by

1943	Casablanca class aircraft carrier CV	8
1945	Shenandoah class support ship AO	4
1953	Prestonian class frigate FF	1
1954	Modified Centaur class aircraft carrier CV	2
1956	Ikazuchi class frigate FF	2
1956	Akebono class frigate FF	2
1956	Harukaze class destroyer DD	4
1957	Centauro class frigate FF	2
1958	Impetuoso class destroyer DD	4
1959	Improved Centaur class aircraft carrier CV	5
1961	F 120 Köln class frigate FF	2
1964	Type 101 Hamburg class destroyer DD	4
1969	Vittorio Veneto class helicopter carrier H	3
1970	Chikugo class frigate FF	1
1970	Joao Coutinho class corvette FS	2
1972	Atsumi class landing ship/platform dock L	2
1975	Miura class landing ship/platform dock L	1
1978	Descubierta class corvette FS	1
1978	Drummond class corvette FS	1
1981	Ulsan class frigate FF	3
1982	Esmeralda class corvette FS	1
1982	Maestrale class frigate FF	2
1983	Almirante Padilla class corvette FS	1
1983	MEKO 360H2 class destroyer DD	4
1985	MEKO 140A16 class corvette FS	2
1994	Jason class landing ship/platform dock L	2