| Class overview | |
|---|---|
| Builders: | AG Weser, Bremen Germaniawerft, Kiel Kaiserliche Werft, Danzig Bremer Vulkan, Vegesack |
| Operators: | Kaiserliche Marine |
| Preceded by: | Type U 66 |
| Completed: | 46 |
| General characteristics | |
| Displacement: | 808 tons (surfaced) 946 tons (submerged) 1160 tons (total) |
| Length: | 70.60 m (overall) 55.55 m (pressure hull) |
| Beam: | 6.30 m (overall) 4.15 m (pressure hull) |
| Draught: | 4.02 m |
| Propulsion: | 2400 hp (surfaced) 1200 hp (submerged) |
| Speed: | 16.8 knots (surfaced) 9.1 knots (submerged) |
| Range: | 11,220 miles (surfaced) 56 miles (submerged) |
| Complement: | 39 men |
| Armament: | 16 torpedoes (4/2 in bow/stern tubes) 105mm deck gun with 220 rounds 88mm deck gun |
Mittel U was a class of U-boats built during World War I by the Kaiserliche Marine.
Mittel U U-boats carried 16 torpedoes and had various arrangements of deck guns. Some had only one 88mm gun while others had a single 105mm gun - but most had both originally. In 1917 some of the boats were refitted with a single 105mm gun.
They carried a crew of 39 and had excellent seagoing abilities with a cruising range of around 11,220 miles. Many arrangements from the Mittel U were also seen on the World War II Type IX U-boats when their design work took place 20 years later.
Between 1915 and 1919 46 were built, amongst them U-88 with Walther Schwieger as commander and U-103 with Claus Rücker.
There were 46 Type Mittel U submarines commissioned into the Kaiserliche Marine.
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