SM U 77
| SM U 77 ( previous / next - all submarines ) |
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| Construction data | ||
| Submarine type: | Single-hull deep-sea boat war order E / UE |
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| Series: | U 75 - U 80 | |
| Builder: | Vulkan shipyard, Hamburg | |
| Build number: | 59 | |
| Launch: | January 9, 1916 | |
| Commissioning: | March 10, 1916 | |
| Technical specifications | ||
| Displacement: | 755 tons (above water) 832 tons (under water) |
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| Length: | 56.80 m | |
| Width: | 5.90 m | |
| Draft: | 4.86 m | |
| Pressure body ø: | 5.00 m | |
| Max. Diving depth: | 50 m | |
| Dive time: | 40-50 s | |
| Drive: | Diesel engines 900 PS E-machines 800 PS |
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| Speed: | 9.9 knots (above water) 7.8 knots (under water) |
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| Armament: | 1 × bow torpedo tube (port side) 1 × stern torpedo tube (starboard) (4 torpedoes in the upper deck) 1 × 8.8 cm deck gun 2 × stern mine tube (38 sea mines) |
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| Mission data | ||
| Commander: |
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| Crew (target strength): | 4 officers 28 men |
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| Calls: | 2 | |
| Successes: | no | |
| Whereabouts: | Lost in a mine operation on the east coast of Scotland in July 1916. | |
SM U-77 was a diesel-electric mines - submarine of the class UE of the German Imperial Navy . It was used in the First World War .
Special feature of the armament and motorization
The main task of U 77 was laying the sea mines, up to 38 of which could be transported inside the boat. They were laid via two outlet pipes in the stern of the boat. It was therefore not primarily a submarine for torpedo attacks. Compared to other deep-sea submarines, it was relatively weakly motorized. Even the surface speed remained in the single digits. The torpedo armament was only used for self-defense.
Calls
U 77 was on 9 January 1916, which Vulkan shipyard in Hamburg from the stack and was put into service on March 10, 1916th The submarine was assigned to the 1st submarine flotilla in June 1916 . The first and only commander was Kapitänleutnant Erich Günzel , who commanded the submarine from its commissioning until its loss in July 1916.
U 77 performed only one completed operation during the First World War . No ships were sunk or damaged in the process.
Whereabouts
On July 5, 1916, U 77 ran from Heligoland for an operation on the east coast of Scotland . Mines were laid in front of Kinnaird Head near Fraserburgh , but they were discovered and cleared on July 7, 1916. The submarine has been missing since then. It may have hit a mine. An average or a human error can also be considered a cause of destruction.
So far it was assumed that the submarine sank further south, off Dunbar . In the meantime, however, a wreck there has been identified as U 74 .
Individual evidence
- ↑ Bodo Herzog: German U-Boats 1906–1966 . Erlangen: Karl Müller Verlag, 1993, p. 136.
- ↑ Bodo Herzog: German U-Boats 1906–1966 . Erlangen: Karl Müller Verlag, 1993, p. 123.
- ↑ Bodo Herzog: German U-Boats 1906–1966 . Erlangen: Karl Müller Verlag, 1993, p. 90.
- ^ Paul Kemp: The German and Austrian submarine losses in both world wars . Graefelfing: Urbes, 1998, p. 19.
literature
- Bodo Herzog: German U-Boats 1906–1966 . Erlangen: Karl Müller Verlag, 1993, ISBN 3-86070-036-7 .
- Paul Kemp: The German and Austrian submarine losses in both world wars . Graefelfing: Urbes, 1998, ISBN 3-924896-43-7 .
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