History
United Kingdom
Builder	Lobnitz, Renfrew
Launched	3 March 1919
Fate	Wrecked 11 November 1931
Notes	Pennant T.8 / T.21
General characteristics
Class and type	Hunt-class minesweeper, Aberdare sub-class
Displacement	800 long tons (813 t)
Length	213 ft (65 m) o/a
Beam	28 ft 6 in (8.69 m)
Draught	7 ft 6 in (2.29 m)
Installed power	2 × Yarrow boilers 2,200 ihp (1,600 kW)
Propulsion	2 shafts 2 vertical triple-expansion steam engines
Speed	16 knots (30 km/h; 18 mph)
Range	1,500 nmi (2,800 km; 1,700 mi) at 15 knots (28 km/h; 17 mph)
Complement	74
Armament	1 × QF 4-inch (102 mm) gun 1 × 76 mm (3.0 in) anti-aircraft gun

HMS Petersfield (ex-Portmadoc) was a Hunt-class minesweeper of the Aberdare sub-class built for the Royal Navy during World War I. She was not finished in time to participate in the First World War. Re-commissioned at Hong Kong on 23 February 1925 for service on the China Station as an admiral's yacht. She was wrecked on 11 November 1931 off Tung Yung Island, with the C-in-C China Station Admiral Sir Howard Kelly embarked. Two courts martial following her loss resulted in severe reprimands for her Captain, Commander Douglas C. Lang and Navigating Lieutenant, Geoffrey A. H. Pratt, though an imperious meddling throughout the unfolding disaster brought ignominy upon Admiral Kelly, as well.

The Aberdare sub-class were enlarged versions of the original Hunt-class ships with a more powerful armament. The ships displaced 800 long tons (810 t) at normal load. They had a length between perpendiculars of 220 feet (67.1 m)^[1] and measured 231 feet (70.4 m) long overall. The Aberdares had a beam of 26 feet 6 inches (8.1 m) and a draught of 7 feet 6 inches (2.3 m). The ships' complement consisted of 74 officers and ratings.^[2]

The ships had two vertical triple-expansion steam engines, each driving one shaft, using steam provided by two Yarrow boilers. The engines produced a total of 2,200 indicated horsepower (1,600 kW) and gave a maximum speed of 16 knots (30 km/h; 18 mph). They carried a maximum of 185 long tons (188 t) of coal^[2] which gave them a range of 1,500 nautical miles (2,800 km; 1,700 mi) at 15 knots (28 km/h; 17 mph).^[1]

The Aberdare sub-class was armed with a quick-firing (QF) four-inch (102 mm) gun forward of the bridge and a QF twelve-pounder (76.2 mm) anti-aircraft gun aft.^[2] Some ships were fitted with six- or three-pounder guns in lieu of the twelve-pounder.^[1]

Her first commander was Stuart Bonham Carter, who went on to become an admiral.^[3]

The minesweeper with the Commander-in-Chief of the China Station, Vice-Admiral Sir William Kelly aboard, ran ashore on the night of Wednesday 11 November 1931 on the north side of Tungyung Island while on a passage from Shanghai to Fuzhou; it was a total loss. The SS Derflinger and the Canadian Pacific liner RMS Empress of Asia went to the Petersfield's assistance, and the county-class cruisers Suffolk and Cornwall proceeded rapidly to the scene. The north-east monsoon was understood to have been raging at the time. The Petersfield was a tender to the cruiser Kent, of the Fifth Cruiser Squadron. Admiral Kelly and 73 officers and men on board were rescued by the Derflinger.

• Petersfield
• Stuart Bonham Carter

• Cocker, M. P. (1993). Mine Warfare Vessels of the Royal Navy: 1908 to Date. Shrewsbury, England: Airlife Publishing. ISBN 1-85310-328-4.
• Colledge, J. J.; Warlow, Ben (2006) [1969]. Ships of the Royal Navy: The Complete Record of all Fighting Ships of the Royal Navy (Rev. ed.). London: Chatham Publishing. ISBN 978-1-86176-281-8.
• Gardiner, Robert & Gray, Randal, eds. (1985). Conway's All the World's Fighting Ships 1906–1921. Annapolis, Maryland: Naval Institute Press. ISBN 0-85177-245-5.
• dreadnought project
• naval-history.net
• wrecksite
• LOSS ON CHINA STATION EVENING POST, VOLUME CXII, ISSUE 118, 14 NOVEMBER 1931

v t e Shipwrecks and maritime incidents in 1931
Shipwrecks	13 Jan: Hanseat 18 Feb: HMAS Pioneer 6 Mar Prince Rupert 15 Mar: Viking 28 Mar: Istar 10 Apr: HMAS Huon 30 May: Harvard 9 Jun: HMS Poseidon 14 Jun: Saint-Philibert 19 Jul: Chitose 23 Jul: HMAS Warrego 30 Jul: Cowlitz 1 Sep: HMS Emperor of India 10 Sep: Koraaga 11 Nov HMS Petersfield 28 Nov Duke of Lancaster 3 Dec Pasages Unknown date: Alacrity, Ernest Renan
Other incidents	6 Jan: Fleurus 1 Feb: Takao Maru 6 Feb: Golden Rod 18 Feb: Leander 21 Mar: Montclare 2 Apr: HMS Glorious 13 Apr: Wisła 8 May: Ruth Kellogg 14 May: HNLMS Sumatra 5 Jun: Empress of Canada (stabbings) 29 Sep: Baychimo 13 Oct: USS Essex 1 Nov: Kaisar-I-Hind 29 Nov River Ribble December (unknown date): Roosevelt Unknown date: Hougomont
1930 1932