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Sister ship Marmion
History
United Kingdom
Name	Offa
Ordered	February 1915
Builder	Fairfield, Govan
Laid down	6 July 1915
Launched	7 June 1916
Completed	31 July 1916
Out of service	30 October 1921
Fate	Sold to be broken up
General characteristics
Class and type	Admiralty M-class destroyer
Displacement	948 long tons (963 t) (normal)
Length	273 ft 4 in (83.3 m) (o/a) 265 feet (80.8 m) (p.p.)
Beam	26 ft 8 in (8.1 m)
Draught	8 ft 11 in (2.7 m)
Installed power	3 Yarrow boilers, 27,800 shp (20,700 kW)
Propulsion	Brown-Curtiss steam turbines, 3 shafts
Speed	34 knots (63 km/h; 39 mph)
Range	2,530 nmi (4,690 km; 2,910 mi) at 15 kn (28 km/h; 17 mph)
Complement	80
Armament	3 × single QF 4-inch (102 mm) guns 2 × single 1-pdr 37 mm (1.5 in) AA guns 2 × twin 21 in (533 mm) torpedo tubes

HMS Offa was a Repeat Admiralty M-class destroyer that served in the Royal Navy during the First World War. The M class was an improvement on those of the preceding L class, capable of higher speed. A member of the Fourteenth Destroyer Flotilla of the Grand Fleet from 1916, Offa had a largely uneventful war. Soon after joining the flotilla, the vessel participated in an exercise that involved most of the dreadnoughts of the First and Third Battle Squadrons but did not take part in any fleet actions with Germany. In 1917, the destroyer was a participant in anti-ship and anti-submarine patrols, but, once again, the ship did not engage any enemy warships. After the Armistice that ended the war, Offa was initially put in reserve and then sold in 1921 to be broken up.

Design and development

Offa was one of 16 Repeat Admiralty M-class destroyers ordered by the British Admiralty in February 1915 as part of the Fourth War Programme soon after the start of the First World War. The M class was an improved version of the earlier L class, required to reach a higher speed in order to counter rumoured new German fast destroyers. The remit was to have a maximum speed of 36 knots (67 km/h; 41 mph) and, although ultimately the destroyers fell short of that ambition in service, the extra performance that was achieved was valued by the navy. It transpired that the German warships did not exist. The Repeat M class differed from the prewar vessels in having a raked stem and minor design improvements based on wartime experience.

The destroyer had a length of 265 ft (80.8 m) between perpendiculars and 273 ft 4 in (83.3 m) overall, with a beam of 26 ft 8 in (8.1 m) and draught of 8 ft 11 in (2.7 m). Displacement was 948 long tons (963 t) normal. Power was provided by three Yarrow boilers feeding Brown-Curtiss steam turbines rated at 27,800 shaft horsepower (20,700 kW). The turbines drove three shafts and exhausted through three funnels. Design speed was 34 knots (63 km/h; 39 mph), which the vessel exceeded on trials. A total of 228 long tons (232 t) of oil was carried to give a design range of 2,530 nautical miles (4,690 km; 2,910 mi) at 15 knots (28 km/h; 17 mph). The ship had a complement of 80 officers and ratings.

Offa had a main armament consisting of three single QF 4-inch (102 mm) Mk IV guns on the centreline, with one on the forecastle, one aft on a raised platform and one between the middle and aft funnels. Torpedo armament consisted of two twin torpedo tubes for 21 in (533 mm) torpedoes located aft of the funnels. Two single 1-pounder 37 mm (1.5 in) "pom-pom" anti-aircraft guns were carried. The anti-aircraft guns were later replaced by 2-pdr 40 mm (1.6 in) "pom-pom" guns and the destroyer was also fitted with racks and storage for depth charges. Initially, only two depth charges were carried but the number increased in service and by 1918, the vessel was carrying between 30 and 50 depth charges.

Construction and career

Offa was laid down by Fairfield at their shipyard in Govan on 6 July 1915, launched on 7 June 1916 and completed on 31 July the same year, the second of the name in service with the Royal Navy. The vessel was deployed as part of the Grand Fleet, joining the Fourteenth Destroyer Flotilla. On 4 July, the new flotilla was sent from Scapa Flow to the Humber. On 22 November, the flotilla took part in exercises north of the Shetland Islands under the dreadnought Iron Duke that also involved the majority of the First and Third Battle Squadrons.

During 1917, the Fourteenth Destroyer Flotilla was involved in anti-submarine operations, and for nine days from 31 July the destroyer was stationed off the Shetland Islands. The operation did not lead to the destruction of any submarines and the Admiralty increasingly redeployed the destroyers of the Grand Fleet to escorting convoys. Nonetheless, on 15 October, Offa formed part of a large-scale operation, involving 30 cruisers and 54 destroyers deployed in eight groups across the North Sea in an attempt to stop a suspected sortie by German naval forces. Despite these measures, the German light cruisers Bremse and Brummer managed to attack the regular convoy between Norway and Britain two days later, sinking two destroyers, Mary Rose and Strongbow, and nine merchant ships before returning safely to Germany.

After the Armistice of 11 November 1918 that ended the war, the Royal Navy returned to a peacetime level of strength and both the number of ships and the amount of personnel in service needed to be reduced to save money. Offa initially joined the Local Defence Flotilla at Portsmouth but was placed in Care and Maintenance at Plymouth alongside 50 other destroyers. The destroyer was retired, and, on 30 October 1921, was sold to W A T Burden to be broken up at Milford Haven.

Pennant numbers

References

Citations

1. ^ McBride 1991, p. 45.
2. Friedman 2009, p. 132.
3. ^ Parkes & Prendergast 1969, p. 109.
4. ^ Friedman 2009, p. 296.
5. ^ Preston 1985, p. 76.
6. Preston 1985, pp. 76, 80.
7. March 1966, p. 174.
8. Friedman 2009, pp. 150, 296.
9. Friedman 2009, p. 152.
10. Manning & Walker 1959, p. 65.
11. "Destroyer Flotillas of the Grand Fleet", Supplement to The Monthly Navy List, p. 12, July 1916, retrieved 7 December 2024 – via National Library of Scotland
12. Naval Staff Monograph No. 33 1927, p. 20.
13. Naval Staff Monograph No. 33 1927, p. 215.
14. Newbolt 1931, p. 55.
15. "Destroyer Flotillas of the Grand Fleet", Supplement to The Monthly Navy List, p. 12, July 1917, retrieved 7 December 2024 – via National Library of Scotland
16. Newbolt 1928, p. 383.
17. Newbolt 1931, p. 151.
18. Newbolt 1931, pp. 153–157.
19. Moretz 2002, p. 79.
20. "III Local Defence and Training Establishments", The Navy List, p. 704, October 1919, retrieved 7 December 2024 – via National Library of Scotland
21. "Vessels under the V.A.O. Reserve", The Navy List, p. 708, January 1920, retrieved 7 December 2024 – via National Library of Scotland
22. Colledge & Warlow 2006, p. 249.
23. Bush & Warlow 2021, p. 64.
24. ^ Bush & Warlow 2021, p. 65.
25. Bush & Warlow 2021, p. 40.
26. Bush & Warlow 2021, p. 51.

Bibliography

• Bush, Steve; Warlow, Ben (2021). Pendant Numbers of the Royal Navy: A Complete History of the Allocation of Pendant Numbers to Royal Navy Warships & Auxiliaries. Barnsley: Seaforth Publishing. ISBN 978-1-526793-78-2.
• Colledge, James Joseph; Warlow, Ben (2006). Ships of the Royal Navy: The Complete Record of All Fighting Ships of the Royal Navy. London: Chatham Press. ISBN 978-1-93514-907-1.
• Friedman, Norman (2009). British Destroyers: From Earliest Days to the First World War. Barnsley: Seaforth Publishing. ISBN 978-1-84832-049-9.
• Manning, Thomas Davys; Walker, Charles Frederick (1959). British Warship Names. London: Putnam. OCLC 780274698.
• March, Edgar J. (1966). British Destroyers: A History of Development, 1892–1953; Drawn by Admiralty Permission From Official Records & Returns, Ships' Covers & Building Plans. London: Seeley Service. OCLC 164893555.
• McBride, Keith (1991). "British 'M' Class Destroyers of 1913–14". In Gardiner, Robert (ed.). Warship 1991. London: Conway Maritime Press. pp. 34–49. ISBN 978-0-85177-582-1.
• Monograph No. 33: Home Waters: Part VII: From June 1916 to November 1916 (PDF). Naval Staff Monographs (Historical). Vol. XVII. Naval Staff, Training and Staff Duties Division. 1927.
• Moretz, Joseph (2002). The Royal Navy and the Capital Ship in the Interwar Period. London: Routledge. ISBN 978-0-71465-196-5.
• Newbolt, Henry (1928). Naval Operations: Volume IV. History of the Great War. London: Longmans, Green and Co. OCLC 1049894132.
• Newbolt, Henry (1931). Naval Operations: Volume V. History of the Great War. London: Longmans, Green and Co. OCLC 220475309.
• Parkes, Oscar; Prendergast, Maurice (1969). Jane's Fighting Ships 1919. Newton Abbott: David & Charles. OCLC 907574860.
• Preston, Antony (1985). "Great Britain and Empire Forces". In Gardiner, Robert; Gray, Randal (eds.). Conway's All the World's Fighting Ships 1906–1921. London: Conway Maritime Press. pp. 1–104. ISBN 978-0-85177-245-5.

v t e M-class destroyers
Royal Navy	Admiralty M class Murray Myngs Matchless Milne Morris Moorsom Negro Mandate Mons Michael Marmion Marne Mystic Martial Milbrook Prince Pylades Maenad Mameluke Mindful Nessus Magic Minion Opal Manners Marvel Mary Rose Ossory Mischief Menace Moresby Opportune Munster Noble Napier Onslaught Nonsuch Nestor Oracle Narwhal Nepean Nicator Nomad Onslow Nereus Narborough Pigeon Plover Partridge Medina Pelican Norman Orestes Petard Paladin Nizam Penn Pasley Medway Orford Plucky Observer Peyton Pellew Nonpareil Peregrine Offa Orpheus Octavia Parthian Northesk Oriole Portia Norseman Osiris Oberon Orcadia Oriana Ophelia Pheasant Obedient North Star Phoebe Obdurate Nugent Hawthorn M class Mentor Mansfield Thornycroft M class Meteor Mastiff Patriot Patrician Rapid Ready Yarrow M class Miranda Minos Manly Moon Morning Star Mounsey Musketeer Nerissa Relentless Rival Yarrow Later M class Sabrina Strongbow Surprise Sybille Truculent Tyrant Ulleswater
Royal Canadian Navy	Thornycroft M class Patriot Patrician
Preceded by: Laforey class Followed by: R class
List of destroyer classes of the Royal Navy

• 1916 ships
• Admiralty M-class destroyers
• Ships built on the River Clyde
• World War I destroyers of the United Kingdom