B-2 (1923–1940) Captured by the Germans at
Fiskå on 11 April.
B-3 (1923–1940) Scuttled in
Alsvåg,
Vesterålen 10 June 1940 by its own crew to prevent capture by the Germans. Ordered to escape to the UK, but prevented by battery explosion.[1]
B-4 (1923–1940) Captured by the Germans at
Filtvet on 10 April.
B-5 (1929–1940) Captured by the Germans at Fiskå on 11 April.
B-6 (1929–1940) Surrendered to German troops on 18 May under threat of bombing of the port of
Florø.