Launch of O 25 in May 1940
History
Netherlands
Name	HNLMS O 25
Ordered	28 June 1938
Builder	Wilton-Fijenoord, Rotterdam
Laid down	10 April 1939
Launched	1 May 1940
Fate	Incomplete, scuttled, later raised by German
Nazi Germany
Name	UD-3
Commissioned	8 June 1941
Decommissioned	13 October 1944
Fate	Scuttled on 3 May 1945
General characteristics [1]
Class and type	O 21-class submarine
Displacement	990 tons surfaced 1205 tons submerged
Length	77.70 m (254 ft 11 in)
Beam	6.80 m (22 ft 4 in)
Draught	3.95 m (13 ft 0 in)
Propulsion	2 × 2,500 PS (2,466 bhp; 1,839 kW) diesel engines 2 × 500 PS (493 bhp; 368 kW) electric motors
Speed	19.5 knots (36.1 km/h; 22.4 mph) surfaced 9 knots (17 km/h; 10 mph) submerged
Range	10,000 nmi (19,000 km; 12,000 mi) at 12 knots (22 km/h; 14 mph) surfaced 28 nmi (52 km; 32 mi) at 8.5 knots (15.7 km/h; 9.8 mph) submerged
Complement	39
Armament	4 × 21 in (533 mm) bow torpedo tubes 2 × 21 in stern torpedo tubes 2 × 21 in (1×2) external-traversing TT amidships
Service record as UD-3[2]
Part of:	3rd U-boat Flotilla June – July 1941 5th U-boat Flotilla July – August 1941 2nd U-boat Flotilla August 1941 – September 1942 10th U-boat Flotilla October 1942 – February 1943 U-boat Defense School March 1943 – October 1944
Identification codes:	M 38 047
Commanders:	K.Kapt. / F.Kapt. Hermann Rigele[3] 8 June 1941 – 23 October 1943 Oblt.z.S. Joachim Seeger[4] 24 October 1943 – 13 October 1944
Operations:	3 patrols
Victories:	1 merchant ship sunk (5,041 GRT)

UD-3 was an O 21-class submarine. The boat was laid down as the Dutch submarine HNLMS K XXV and renamed HNLMS O 25 but was captured during the German invasion of the Netherlands in World War II and commissioned in the Kriegsmarine.

Ship history

The submarine was ordered on 28 June 1938 and laid down on 10 April 1939 as K XXV at the Wilton-Fijenoord, Rotterdam. During construction she was renamed O 25, and was finally launched on 1 May 1940. Following the German invasion of 10 May 1940, O 25 was scuttled in the Nieuwe Waterweg near Rotterdam because there was no tugboat available to tow her to the United Kingdom.^[5]

The boat was raised by the Germans and it was decided to repair and complete her. She served in the Kriegsmarine as UD-3 and was commissioned on 8 June 1941.^[5]

From June to July 1941 UD-3 served as a trial boat in Kiel while attached to the 3rd Flotilla. In June she was transferred to the 5th Flotilla also in Kiel where she was used as a school boat. She remained there until August that year. From August 1941 until September 1942 the boat was stationed at Lorient in occupied France and attached to the 2nd Flotilla. In October 1942 she was transferred to 10th Flotilla also in Lorient where she served until February 1943.^[5]

When patrolling off the west coast of Africa UD-3 spotted and sank the 5,041 GRT Norwegian freighter Indra on 26 November 1942.^[5]

In March 1943 the boat was transferred to Bergen in occupied Norway and attached to the U-boot Abwehr Schule to be used as school boat until October 1944.^[5] On 13 October 1944, UD-3 was decommissioned after being damaged in an air raid on Kiel. On 3 May 1945 the boat was scuttled.^[5]

Summary of raiding history

Date	Ship Name	Nationality	Tonnage (GRT)	Fate[3]
26 November 1942	Indra	Norway	5,041	Sunk