U-1406, a vessel of the same class as U-1405
|Ordered||4 January 1943|
|Builder||Blohm & Voss, Hamburg|
|Laid down||15 October 1943|
|Launched||1 December 1944|
|Commissioned||21 December 1944|
|Fate||Scuttled on 5 May 1945, later broken up|
|General characteristics |
|Class and type||Type XVIIB submarine|
|Draught||4.30 m (14 ft 1 in)|
|Test depth||150 m (490 ft)|
German submarine U-1405 was a Type XVIIB U-boat of Nazi Germany's Kriegsmarine during the Second World War. She was one of a small number of U-boats fitted with Hellmuth Walter's high test peroxide propulsion system, which offered a combination of air-independent propulsion and high submerged speeds.
The U-1405 was laid down on 15 October 1943 at the Blohm & Voss, Hamburg, as yard number 255. She was launched on 1 December 1944 and commissioned under the command of Leutnant zur See Wilhelm Rex on 21 December 1944.
When completed, U-1405 was 41.45 metres (136 ft) long overall, with a beam of 4.50 metres (14 ft 9 in) and a draught of 4.3 metres (14 ft 1 in). She was assessed at 337 long tons (342 t) submerged. The submarine was powered by one Deutz SAA 8M517 supercharged 8-cylinder diesel engine producing a total of 210–230 metric horsepower (150–170 kW; 210–230 shp) for use while surfaced and one Walter gas turbine producing a total of 2,500 metric horsepower (1,800 kW; 2,500 shp) for use while submerged. She had one shaft and one propeller. The submarine had a maximum surface speed of 8.5 knots (15.7 km/h; 9.8 mph) and a maximum submerged speed of 25 knots (46 km/h; 29 mph) using the HTP drive. When submerged, the U-boat could operate for 123 nautical miles (228 km; 142 mi) at 25 knots (46 km/h; 29 mph) on her HTP system and when surfaced, she could travel 3,000 nautical miles (5,600 km; 3,500 mi) at 8 knots (15 km/h; 9.2 mph).
The submarine was fitted with two 53.3 cm (21 in) torpedo tubes (All fitted at the bow) and four torpedoes. The boat had a complement of 19 men.
U-1405 did not undertake any war patrols and was instead assigned as a training boat at first to the 8th U-boat Flotilla, followed by the 5th U-boat Flotilla.
The U-1405 was scuttled on 5 May 1945 in Eckernförde Bay during Operation Regenbogen. The wreck was later raised and broken up.