SM UB-77
German Type UB III submarine used by the Imperial German Navy (1917-1919)
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SM UB-77 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 2 October 1917 as SM UB-77.[Note 1]
SM UB-77 in Wilhelmshaven | |
| History | |
|---|---|
 German Empire | |
| Name | UB-77 |
| Ordered | 23 September 1916[1] |
| Builder | Blohm & Voss, Hamburg |
| Cost | 3,338,000 German Papiermark |
| Yard number | 306 |
| Launched | 5 May 1917[2] |
| Commissioned | 2 October 1917[2] |
| Fate | Surrendered 16 January 1919.[2] |
| General characteristics [2] | |
| Class & type | Type UB III submarine |
| Displacement | |
| Length | 55.30 m (181 ft 5 in) (o/a) |
| Beam | 5.80 m (19 ft) |
| Draught | 3.68 m (12 ft 1 in) |
| Propulsion |
|
| Speed |
|
| Range |
|
| Test depth | 50 m (160 ft) |
| Complement | 3 officers, 31 men[2] |
| Armament |
|
| Service record | |
| Part of |
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| Commanders | |
| Operations | 7 patrols |
| Victories | |
UB-77 was surrendered on 16 January 1919 in accordance with the requirements of the Armistice with Germany and broken up in Swansea in 1921.[2]
Construction
UB-77 was ordered by the GIN on 23 September 1916.
She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 5 May 1917. UB-77 was commissioned later that same year under the command of Kptlt. Wilhelm Meyer. Like all Type UB III submarines, UB-77 carried 10 torpedoes and was armed with a 8.8 cm (3.46 in) deck gun. UB-77 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,680 nautical miles (16,080 km; 9,990 mi). UB-77 had a displacement of 516 t (508 long tons) while surfaced and 648 t (638 long tons) when submerged. Her engines enabled her to travel at 13.6 knots (25.2 km/h; 15.7 mph) when surfaced and 7.8 knots (14.4 km/h; 9.0 mph) when submerged.
Summary of raiding history
| Date | Name | Nationality | Tonnage[Note 2] | Fate[5] |
|---|---|---|---|---|
| 5 February 1918 | Tuscania |  United Kingdom |
14,348 | Sunk |
| 31 March 1918 | Celtic |  United Kingdom |
20,904 | Damaged |
| 28 August 1918 | Lompoc | United Kingdom |
7,270 | Damaged |