HMS M4 [SEP] manufacturer
HMS M4
HMS "M4" was an M-class submarine of the Royal Navy built by Armstrong Whitworth, Newcastle Upon Tyne, and laid down in 1917. "M4" was cancelled and sold as an incomplete hulk on 30 November 1921.
- HMS "K13"
- HMS "K14"
- HMS "K15"
- HMS "K16"
- HMS "K17"
- HMS "K26"
- L class
- M class
- HMS "M1"
- HMS "M2"
- HMS "M3"
- HMS "M4"
- "Nautilus" class
- R class
- HMS "X1"
- "Odin" class
- "Parthian" class
- "Rainbow