NAVYPEDIA

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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 equipment	GHG sonar
Complement	44
Diving depth operational, m	100

Standard scale images

Graphics

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.