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FIGHTING SHIPS OF THE WORLD
UNITED KINGDOM
SUBMARINES
"VIIC series" ex-German submarine  (GRAPH) (1, 1941 / 1941)


Photo



Graph

Ships


Name No Yard No Builder Laid down Launched Comp Fate
Graph, 1942 - P715 (ex-U570) P715   Blohm & Voss, Hamburg, Germany 5.1940 20.3.1941 5/1941 // 9.1941 wrecked 20.3.1944


Technical data


Max speed, kts, kn

17 / 7,6

Displacement standard, t---
Displacement normal, t

749 / 851

Length, m

67.1

Breadth, m

6.20

Draught, m

4.80

No of shafts

2

Machinery

2 diesels / 2 electric motors

Power, h. p.

2800 / 750

Fuel, t

diesel oil 114

Endurance, nm(kts)8500(10) / 80(4)
Armament

1 x 1 - 88/42 SK C/35, 1 x 1 - 20/65 SK C/30, 5 - 533 TT (4 bow, 1 stern, 11)

Electronic equipmentGHG sonar
Complement44
Diving depth operational, m100


Standard scale images


<i>Graph</i> 1941
Graph 1941


Graphics


<i>Graph</i>
Graph


Project history

Submarines of VII series became the most well-known submarines of World War II and the biggest class of submarines in history. They were presented by Kriegsmarine chiefs as practically ideal submarinee, combining powerful armament for their sizes, excellent manoeuvring qualities, very short diving time (25-20sec), significant endurance and relative cheapness of building.

They were designed on the basis of UB-III class coastal submarines of WWI period, but with hull lines of II series, which dimensions have been increased. Single-hulled, with adding of blisters for improvement of surface buoyancy and internal fuel tanks. The thickness of a pressure hull reached 18.5mm, that ensured operational diving depth to 100m and maximal to 200m.

Modernizations

None.

Naval service

German submarine U570 27.8.1941 was damaged by Hudson aircraft of 269th RAF sqn and Catalina of RAF 209th sqn S of Iceland, has hung out the flag of truce; she was captured by RN trawler Northern Chief and escort destroyer Burwell, repaired and commissioned by RN in September. Used for training. She ran aground on the West coast of the Island of Islay, Scotland 20.3.1944.