B class

===Description===
The oldest class of British submarines still afloat, intended for coastal patrol work. They are enlarged and improved versions of the preceding A class.
===Ship data===
Performance
Endurance: 1853 km
Maximum speed: 12 kts
Armour Protection
Armour: 1
Armament
2 x 18in Mk VIII Torpedo. Ammo: 4 torpedoes
===Ships in class===
* B.1
* B.3
* B.4
* B.5
Category:Royal Navy
Category:Ship type
Category:Submarine
Category:Coastal Submarine