Germany 2 cm/65 (0.79) C/30 and C/38 - NavWeaps

German WW2 Torpedo Boats

German Type IXA submarine - Wikipedia

German WW2 Torpedo Boats

Germany 28 cm/50 (11) SK L/50 - NavWeaps

Germany 2 cm/65 (0.79) C/30 and C/38 - NavWeaps

2cm MG C/30 anti-Aircraft gun Hocus, Pocus, Fidibus, Three Black Cats, aka my 1/400-scale tribute to U-48

What is the largest naval gun currently in use? - Quora

Scharnhorst-class Battleship - Implemented Suggestions - War Thunder - Official Forum

What's the largest Calibre weapon fitted on any warship which is still in service? - Quora