Class U

Boats in this Class Dolfijn (1) Haai

Dolfijn (1) departing Beirut (Lebanon)

Boat	Dolfijn (1)	Haai
Call sign	Dutch 1945: O 1, ex Dolfijn, ex P 47	-
Class name	British navy: U (2nd group) Dutch navy: U
Laid down	19 Nov 1941	29 Apr 1942
Launched	27 July 1942	22 Jan 1943
Commissioned	British Navy: never (8 Oct 1942) Transferred: 25 Sep 1942 Dutch navy: 8 Oct 1942 (7 Nov 1942)	British navy: never Dutch navy: never Norwegian Navy: 3 Apr 1944
Stricken	Dutch navy: Dec 1946	-
Decommissioned	British navy: Dutch navy: 1952	?
Fate	May 1952: Sold for break up	Dec 1965: Sold for break up
Other names	British navy: P 47	British navy: P 66, Varne Norwegian Navy: Ula, U 21, 301
Shipyard	Vickers Armstrong, Barrow, U.K.
Le x Be x Dr	60.05 m x 4.88 m x 3.87 m
Displ. surf/subm	632 t (545 t) / 735 t
Propulsion	Diesel-electric
Engines	Two 6-cylinder Davey Paxman-Ricardo diesel engines, 4-stroke, 2 x 400 apk
Fuel	56 t
Main motor	2 x 412 apk. According to some sources: one 825 hp motor and a special motor coupled to the starboard shaft for noiseless navigation using very little current.
Batteries	2 x 112 cells. 4000 Ah during 5 hours
Propellers	2
Speed surf/subm	12 kts / 9 kts
Range surf/subm	4000 nm at 10 kts / 30 nm at 9 kts
Diving depth	60 m
Complement	36
Torpedo tubes	4 x 21" bow
Torpedo Type	Mk VIII
Armament	8 torpedoes, incl. 4 reloads
Guns	1 x 7.6 cm, 3 x 20 mm machine guns
Notes	- The Dutch Navy originally requested three T class submarines, but all T class boats  were needed    by the British Navy themselves, so the British Navy offered the Dutch two U class boats that were    still under construction.

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