WWI U-boat Types

Type Large Ms.

Ocean-going diesel-powered torpedo attack boats class

Construction history of type Large Ms.

U-boats# ShipyardWerk #Built during
U 135 - U 1384Kaiserliche Werft, Danzig1916 - 1918

U 135 of type Large Ms

These vessels were intended for deep sea usage and were very seaworthy and relatively comfortable. Average manoeuvrability.

Gröner, E. (1991). German Warships 1815-1945, vol 2. U-boats and mine warfare vessels.

All U-boats of type Large Ms.

Below are the 4 commissioned U-boats of this type.

U 135, U 136, U 137 and U 138

Technical information for type Large Ms.

1175 (sf)
1534 (sm)
1880 (total)
Length: (m)83,50 oa
65,57 ph
Beam: (m)7,54 oa
4,85 ph
Draught: (draft)4,26 m
Height:9,46 m
Power: (hp)3500 (sf)
1690 (sm)
17,0 (sf)
8,1 (sm)
(miles / knots)
10,000/8 (sf)
50/4,5 (sm)
4/2 (bow / stern tubes)
Mines:No mines carried
Deck gun:10,5cm
540 rounds
Crew:46 men
Max depth:ca. 75 m
(246 feet)
sm = submerged, sf = surfaced, ph = pressure hull,
oa = overall, hp = horsepower.