Ships of the Nationalist and Republican Navies during the Spanish Civil War: B-class Submarines

Built at Cartagena between 1916 and 1923, the design was an improved Holland-type. They all served in the Republican Navy.

Ships' characteristics:

• Displacement: 491 tons surfaced; 715 tons submerged
• Dimensions:
• Length: 210’ 4” (64.1m)
• Beam: 17’ 4” (5.6m)
• Draught (on surface): 11’ 3” (3.4m)
• Maximum Speed: 16 knots (surfaced); 10 knots (submerged)
• Armament: 1 x 3” (76mm) (1 x 1); 4 x 18” (457mm) Torpedo Tubes (2 bow, 2 stern)
• Complement: 28

B1 was scuttled at Cartagena at the end of the Civil War.
B2 was scuttled at Cartagena at the end of the Civil War.
B3 was scuttled at Porman at the end of the Civil War.
B4 was scuttled at Porman at the end of the Civil War.
B5 was sunk by Nationalist aircraft off Malaga on 12th October 1936.
B6 was sunk by the Velasco off Cape Penas on 19th September 1936.