The Grampus-class submarines were a group of minelaying submarines built for the Royal Navy in the late 1930s. These boats are sometimes referred to as the Porpoise class from the single prototype, HMS Porpoise built in 1932. Five boats to a modified design were built between 1936 and 1938. The ships were all named after marine mammals.
Unit Run[]
- HMS Porpoise (N14)
- HMS Grampus (N56)
- HMS Narwhal (N45)
- HMS Rorqual (N74)
- HMS Cachalot (N83)
- HMS Seal (N37)