SM UC-77 explained

SM UC-77 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 12 January 1916 and was launched on 2 December 1916. She was commissioned into the German Imperial Navy on 29 December 1916 as SM UC-77.[1] In 13 patrols UC-77 was credited with sinking 35 ships, either by torpedo or by mines laid. UC-77 was mined and sunk off Flanders on 11 July 1918.

Design

A Type UC II submarine, UC-77 had a displacement of 410t when at the surface and 493t while submerged. She had a length overall of 50.45m (165.52feet), a beam of 5.22m (17.13feet), and a draught of 3.650NaN0. The submarine was powered by two six-cylinder four-stroke diesel engines each producing 290PS300PS (a total of 580PS600PS), two electric motors producing 620PS, and two propeller shafts. She had a dive time of 30 seconds and was capable of operating at a depth of .

The submarine had a maximum surface speed of and a submerged speed of . When submerged, she could operate for at ; when surfaced, she could travel at . UC-77 was fitted with six mine tubes, eighteen UC 200 mines, three torpedo tubes (one on the stern and two on the bow), seven torpedoes, and one 8.8sp=usNaNsp=us Uk L/30 deck gun. Her complement was twenty-six crew members.

Summary of raiding history

DateNameNationalityTonnage[2] Fate[3]
24 March 1917Grenmar Norway1,438Sunk
25 March 1917Prince of Wales United Kingdom158Sunk
27 March 1917Galatia United Kingdom150Sunk
27 March 1917Nova Norway1,034Sunk
27 March 1917Sandvik Norway591Sunk
28 March 1917Moulmein United Kingdom151Sunk
28 March 1917Tizona Norway1,021Sunk
30 March 1917Petrel United Kingdom151Sunk
26 April 1917HMT Repro230Sunk
3 May 1917Glen Tanar United Kingdom817Sunk
4 May 1917Herrington United Kingdom1,258Sunk
4 May 1917Vale Norway720Sunk
4 May 1917Wolseley United Kingdom159Damaged
5 May 1917Odense Denmark1,756Sunk
6 May 1917Kaparika Norway1,232Sunk
3 June 1917Virgilia United Kingdom209Sunk
6 June 1917Anton Sweden1,568Sunk
6 June 1917Harald Klitgaard Denmark1,799Sunk
11 July 1917Vordingborg Denmark2,155Sunk
13 July 1917Ascain France1,686Sunk
8 August 1917Berlengas Portugal3,548Sunk
11 August 1917Sonnie United Kingdom2,642Sunk
7 September 1917Scottish Prince United Kingdom2,897Damaged
10 September 1917Ioanna United Kingdom3,459Damaged
15 October 1917Leander United Kingdom2,793Damaged
19 October 1917Eldra United Kingdom227Sunk
17 November 1917Adolph Andersen Denmark981Sunk
18 November 1917Antwerpen United Kingdom1,637Sunk
18 November 1917Gisella United Kingdom2,502Sunk
19 November 1917Amiral Zede France5,980Sunk
19 November 1917Clangula United Kingdom1,754Sunk
19 November 1917Robert Brown United Kingdom119Sunk
30 November 1917Remoqueur N° 8 France250Sunk
7 March 1918Cliffside United Kingdom4,969Damaged
10 March 1918Skrymer Norway1,476Sunk
18 March 1918Baygitano United Kingdom3,073Sunk
15 April 1918City of Winchester United Kingdom7,981Damaged
15 April 1918Pomeranian United Kingdom4,241Sunk
6 June 1918Huntsland United Kingdom2,871Sunk
9 June 1918Moidart United Kingdom1,303Sunk
10 June 1918Saint Barthelemy France1,476Damaged
14 June 1918HMT Princess Olga245Sunk

References

Bibliography

Notes and References

  1. "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
  2. Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
  3. uc77. UC 77. 1boat. 4 March 2015.

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