Contents

SMUB-77

UB-148 at sea, a U-boat similar to UB-77.
History
German Empire
Name	UB-77
Ordered	23 September 1916[2]
Builder	Blohm & Voss, Hamburg
Cost	3,338,000 German Papiermark
Yard number	306
Launched	5 May 1917[1]
Commissioned	2 October 1917[1]
Fate	Surrendered 16 January 1919.[1]
General characteristics [1]
Class and type	Type UB III submarine
Displacement	516 t (508 long tons) surfaced 648 t (638 long tons) submerged
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	2 × propeller shaft 2 × MAN four-stroke 6-cylinder diesel engines, 1,085 bhp (809 kW) 2 × Siemens-Schuckert electric motors, 780 shp (580 kW)
Speed	13.6 knots (25.2 km/h; 15.7 mph) surfaced 7.8 knots (14.4 km/h; 9.0 mph) submerged
Range	8,680 nmi (16,080 km; 9,990 mi) at 8 knots (15 km/h; 9.2 mph) surfaced 55 nmi (102 km; 63 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth	50 m (160 ft)
Complement	3 officers, 31 men[1]
Armament	5 × 50 cm (19.7 in) torpedo tubes (4 bow, 1 stern) 10torpedoes 1 × 8.8 cm (3.46 in) deck gun
Service record
Part of:	V Flotilla 30 November 1917 – 17 April 1918 I Flotilla 17 April – 11 November 1918
Commanders:	Kptlt. Wilhelm Meyer[3] 2 October 1917 – 14 June 1918 Oblt.z.S. Franz Maurer[4] 15 June – 11 November 1918
Operations:	7 patrols
Victories:	1 merchant ship sunk (14,348 GRT) 2 merchant ships damaged (28,174 GRT)

SMUB-77 was a German Type UB III submarineorU-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]}

UB-77 was surrendered on 16 January 1919 in accordance with the requirements of the Armistice with Germany and broken upinSwansea in 1921.^[1]

Construction[edit]

UB-77 was ordered by the GIN on 23 September 1916.

She was built by Blohm & VossofHamburg 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[edit]

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

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