B
- Baire (Cuba): 500-ton gunboat
- Barranquilla (Colombia): 142-ton gunboat
- Bathurst Class (Argentina): 500-ton minesweeper
- Bellona (Denmark): 369-ton C class submarine
- Belomorec (Bulgaria): 77-ton patrol boat
- Beskytteren (Denmark): 415-ton fisheries patrol vessel
- Birago (Germany): 50-ton patrol boat, ex-Siofok (Austria)
- Bogota (Colombia): 360-ton gunboat
- Bouchard class (Argentina): 450-ton minesweeper
- Brage (Norway): 260-ton minelayer
Read more about this topic: List Of World War II Ships Of Less Than 1000 Tons