NAVYPEDIA

Ships

Name	No	Yard No	Builder	Laid down	Launched	Comp	Fate
U87		31	KW Danzig	1915	22.5.1916	2.1917	sunk 25.12.1917
U88		32	KW Danzig	1915	22.6.1916	4.1917	sunk 5.9.1917
U89		33	KW Danzig	1915	6.10.1916	6.1917	sunk 13.2.1918
U90		34	KW Danzig	1915	12.1.1917	8.1917	to United Kingdom 11.1918
U91		35	KW Danzig	1915	14.4.1917	9.1917	to France 11.1918
U92		36	KW Danzig	1915	12.5.1917	10.1917	sunk 9.9.1918

Technical data

Displacement standard, t
Displacement normal, t	757 / 998
Length, m	65.8
Breadth, m	6.20
Draught, m	3.88
No of shafts	2
Machinery	2 MAN diesels / 2 SSW electric motors
Power, h. p.	2400 / 1200
Max speed, kts	15.6 / 8.6
Fuel, t	diesel oil 133
Endurance, nm(kts)	11380(8) / 56(5)
Armament	U87 - 89: 1 x 1 - 105/43 TK L/45 C/16, 1 x 1 - 88/27 TK L/27 C/08, 4 - 500 TT (2 bow, 2 stern, 10 - 12) U90: 1 x 1 - 105/43 TK L/45 C/16, 4 - 500 TT (2 bow, 2 stern, 10 - 12) U91, 92: 1 x 1 - 105/42 Utof L/45 C/16, 4 - 500 TT (2 bow, 2 stern, 10 - 12)
Complement	36
Diving depth operational, m	50

Standard scale images

Project history

War order F. Double-hulled. The 'Project 25' boats, based on the U50. They had a diving time of 56 seconds, and in most respects resembled previous classes.

Modernizations

None.

Naval service

U87 was sunk by ramming and deep charges of British patrol boat P56 in the Irish Sea 25.12.1917. U88 was mined 5.9.1917 in the Deutsche Bight. U89 was rammed by British cruiser Roxburgh 13.2.1918 in the Atlantic. U92 was mined in the North Sea 9.9.1918.