HMS Mounsey (1915)

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For other ships with the same name, see HMS Mounsey.

History
United Kingdom
NameHMS Mounsey
BuilderYarrow, Scotstoun
Laid down18 October 1914
Launched11 September 1915
CompletedNovember 1915
FateSold November 1921
General characteristics
Class and typeYarrow M-class destroyer
Displacement879–893 long tons (893–907 t)
Length271 ft 6 in (82.75 m) oa
Beam25 ft 7+1⁄2 in (7.81 m)
Draught10 ft 8 in (3.25 m)
Installed power23,000 shp (17,000 kW)
Propulsion
  • 3× Yarrow boilers
  • Brown-Curtis steam turbines
  • 2 shafts
Speed35 kn (40 mph; 65 km/h)
Complement76
Armament
  • 3 × 4-inch (102 mm) guns
  • 2 × 2-pounder (40 mm) guns
  • 4 × 21 inch (533 mm) torpedo tubes

HMS Mounsey was a Yarrow M-class destroyer of the British Royal Navy. Built by the Scottish shipbuilder Yarrow in 1914–1915, Mounsey served in the Grand Fleet during the First World War, and took part in the Battle of Jutland. The following year she saw combat against German submarines, and in 1918 she helped rescue crew and passengers aboard the damaged troopship Otranto. She was sold for scrap in 1921.

Design and construction[edit]

The M-class destroyers were designed to meet a requirement for faster destroyers than the previous Laforey-class , in order to match reported German ships. They hoped for a speed of 36 knots (41 mph; 67 km/h), but otherwise, the requirements were similar to those that gave rise to the Laforeys. As part of its 1913–1914 shipbuilding programme, the Admiralty ordered six ships to the standard Admiralty design, together with seven builder's specials from the experienced destroyer builders Yarrow, Thornycroft and Hawthorn Leslie, to the builder's own designs.[1][2][3] The outbreak of the First World War resulted in a series of large orders being placed for destroyers to replace expected losses, with the existing M-class being chosen for orders rather than new designs to speed production. Twenty M-class destroyers were ordered in September 1914 as part of the First Emergency War Programme, with the order consisting of 16 Admiralty M-class ships and four Yarrow specials.[a][5][6]

Mounsey was 271 feet 6 inches (82.75 m) long overall and 260 feet 3 inches (79.32 m) between perpendiculars, with a beam of 25 feet 7+1⁄2 inches (7.81 m) and a draught of 10 feet 8 inches (3.25 m).[7][8] Displacement of the Yarrow specials was 879–893 long tons (893–907 t).[9][b] Three Yarrow water-tube boilers fed steam to Brown-Curtis impulse steam turbines, driving two propeller shafts. Two funnels were fitted, a distinguishing feature of the Yarrow specials. The machinery was rated at 23,000 shaft horsepower (17,000 kW) giving a speed of 35 knots (40 mph; 65 km/h).[10][11]

The ships were armed with three 4-inch (102 mm) QF Mk 4 guns, together with two 2-pounder pom-pom anti-aircraft autocannons. Two twin 21-inch (533mm torpedo tubes were fitted.[7][11] The ships had a crew of 80.[11]

Mounsey, named for Captain William Mounsey,[12] was laid down at Yarrow's Scotstoun shipyard on 18 October 1914 and launched on 11 September 1915.[4] She reached a speed of 39.018 kn (44.901 mph; 72.261 km/h) over the measured mile and 38.605 kn (44.426 mph; 71.496 km/h) over four hours during sea trials[7] and was completed in November 1915.[4]

Service[edit]

By January 1916, Mounsey had joined the 11th Destroyer Flotilla, part of the Grand Fleet.[13] On 18 March 1916, the sighting of a submarine off the entrance to Lough Swilly in the north of Ireland led to a suspension of all sea traffic through the North Channel. Mounsey and sister ship Mons, which had just finished refitting on the Clyde, were briefly stopped from returning to their base at Scapa Flow until orders were clarified.[14]

Mounsey took part in the Battle of Jutland, departing from Cromarty on 30 May with most of the rest of the 11th Flotilla in support of the 2nd Battle Squadron.[15][16] The 11th Flotilla clashed several times with German forces during the night of 31 May/1 June,[17] with Mounsey undamaged.[18] Mounsey, together with the destroyer Moon, was detached from the Fleet on the afternoon of 1 June to escort the battleship Valiant to Rosyth.[19]

On 13 April 1917, the Admiralty intercepted radio signals from the German submarine U-50, indicating that the submarine UC-30 has suffered failure of one of her engines, and was making her way back to Germany from St Kilda at a speed of 3 kn (3.5 mph; 5.6 km/h). Mounsey was ordered to lead five more destroyers to patrol off the north of Scotland to intercept UC-30 early on 14 April, and later that day sighted a submarine that dived away to safety (which was probably the British submarine G9, also searching for UC-30). While UC-30 evaded the searching British forces, the submarine never returned home, possibly sunk by a mine.[20][21] On 24 June 1917, Mounsey and the destroyer Opal were escorting an east-bound convoy on the Scandinavian (Lerwick–Norway) route, when the convoy came under attack by the German submarine U-67, which fired two torpedoes from distance at the convoy, one of which hit and sank the Swedish merchant ship Viking. In response, Opal followed back the track of the torpedo and dropped a depth charge on the estimated location of the submarine, but U-67 escaped unharmed.[22] On 30 July, Mounsey was again escorting an east-bound convoy from Lerwick when she sighted a submarine at a distance of about 12 nmi (14 mi; 22 km). Mounsey made for the submarine, which dived away, but later that day the submarine U-60 torpedoed and sank the Norwegian Canis from the convoy.[23]

Mounsey remained part of the 11th Flotilla in March 1918,[24] but in April that year transferred to the 3rd Destroyer Flotilla, still attached to the Grand Fleet.[25] In May 1918, Monsey moved again, this time to the 2nd Destroyer Flotilla, assigned to the Coast of Ireland Station and based at Buncrana in the north of Ireland.[26]

On 6 October 1918, the troopship Otranto, part of a convoy carrying American troops to Europe, collided with the liner Kashmir in heavy seas in the North Channel. Otranto was badly damaged and was soon forced to stop by flooding, and had drifted close to the coast of Islay by the time that Mounsey arrived in response to Otranto's distress signal. Mounsey was unable to come alongside Otranto to take off Otranto's crew and passengers owing to the very heavy seas, and instead, her commanding officer, Lieutenant Francis Craven, took the destroyer as close as possible on Otranto's lee side so that men could jump over to Mounsey. Craven took Mounsey alongside Otranto four times in total, rescuing 596 of Otranto's passengers and crew before, with no more room for any more survivors and damaged by impacts with the side of the troopship, was forced to break off the rescue attempts and make for port. Otranto ran aground on Islay about 30 minutes after Mounsey left, killing 431.[27][28] Craven was awarded the Distinguished Service Order for Mounsey's rescue efforts.[29][30]

Disposal[edit]

Mounsey was paid off by December 1918,[31] and had moved to Devonport by February 1919.[32] Mounsey was sold for scrap to Slough Trading Company on 8 November 1921 and broken up in Germany.[33][c]

Pennant numbers[edit]

Pennant number[33] Dates
H0C 1915–January 1917
G14 January 1917–April 1918
HC0 April 1918–June 1918
G1A June 1918–

Notes[edit]

  1. ^ Moon, Morning Star, Mounsey and Musketeer.[4]
  2. ^ Mounsey displaced 835 long tons (848 t) during sea trials.[7]
  3. ^ Slough Trading Company acted as an agency for German shipbreakers.[34]

Citations[edit]

  1. ^ Gardiner & Gray 1985, p. 77
  2. ^ Friedman 2009, pp. 132, 134–135
  3. ^ McBride 1991, p. 37
  4. ^ a b c Friedman 2009, p. 308
  5. ^ Gardiner & Gray 1985, p. 80
  6. ^ McBride 1991, pp. 37–38
  7. ^ a b c d H.M.T.B Destroyer Mounsey 1919, p. 240
  8. ^ Friedman 2009, p. 296
  9. ^ Manning 1961, p. 70
  10. ^ Friedman 2009, pp. 156, 296
  11. ^ a b c Gardiner & Gray 1985, p. 79
  12. ^ Manning & Walker 1959, p. 306
  13. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: I — The Grand Fleet: Destroyer Flotillas of the Grand Fleet". The Navy List. January 1916. p. 12. Retrieved 15 February 2021 – via National Library of Scotland.
  14. ^ Naval Staff Monograph No. 31 1926, pp. 100, 235–236
  15. ^ Campbell 1998, pp. 13–14, 23–24
  16. ^ Corbett 1920, p. 428
  17. ^ Campbell 1998, pp. 279–280, 288, 291–292
  18. ^ Campbell 1998, pp. 338, 340
  19. ^ Campbell 1998, p. 321
  20. ^ Naval Staff Monograph No. 34 1933, pp. 436–437, 456–458
  21. ^ Kemp 1997, p. 26
  22. ^ Naval Staff Monograph No. 35 1939, p. 265
  23. ^ Naval Staff Monograph No. 35 1939, p. 268
  24. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: I — The Grand Fleet: Destroyer Flotillas of the Grand Fleet". The Navy List. March 1918. p. 12. Retrieved 16 February 2021 – via National Library of Scotland.
  25. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: I — The Grand Fleet: Destroyer Flotillas of the Grand Fleet". The Navy List. April 1918. p. 12. Retrieved 16 February 2021 – via National Library of Scotland.
  26. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: X — Coast of Ireland Station: Northern Division (Headquarters–Buncrana)". The Navy List. May 1918. p. 18. Retrieved 16 February 2021 – via National Library of Scotland.
  27. ^ Dorling 1932, pp. 237–239
  28. ^ Graham, Stuart (25 October 2017). "The fateful day hundreds died as ship foundered off Islay". The Oban Times. Retrieved 16 February 2021.
  29. ^ Dorling 1932, p. 239
  30. ^ "To be Companions of the Distinguished Service Order: Lieut. Francis Worthington Craven, R.N." The London Gazette (Supplement). No. 31236. 14 March 1919. p. 3592.
  31. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: X — Coast of Ireland Station: Northern Division (Headquarters–Buncrana)". The Navy List. December 1918. p. 18. Retrieved 16 February 2021 – via National Library of Scotland.
  32. ^ "Supplement to the Navy List Showing Organisation of the Fleet, Flag Officers' Commands &c.: X — Vessels at Home Ports and other Bases Temporarily: Devonport". The Navy List. February 1919. p. 20. Retrieved 16 February 2021 – via National Library of Scotland.
  33. ^ a b Dittmar & Colledge 1972, p. 67
  34. ^ Dittmar & Colledge 1972, p. 330

Bibliography[edit]

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