HMS Arno was a unique destroyer of the Royal Navy that saw service and was lost during First World War. She was under construction in Genoa, Italy for the friendly Portuguese Navy as Liz in 1914 when she was bought by the Royal Navy for service in the Mediterranean.

HMS Arno in 1915
History
United Kingdom
Name	HMS Arno
Builder	Ansaldo, Genoa
Laid down	1914
Launched	22 December 1914
Completed	1915
Identification	Pennant number : 6A
Fate	Sunk in collision, 23 March 1918
General characteristics
Type	Destroyer
Displacement	520 long tons (530 t)
Length	321 ft (98 m)
Beam	23 ft 6 in (7.16 m)
Draft	7 ft (2.1 m)
Installed power	8,000 shp (6,000 kW)
Propulsion	2 × steam turbines 2 × shafts
Speed	28.5 kn (52.8 km/h; 32.8 mph)
Capacity	130 long tons (130 t) fuel oil
Armament	4 × single 12-pounder guns, 3 × single 18-inch (450 mm) torpedo tubes

She had two funnels and masts and four QF 12-pounder guns, shipped sided on the forecastle, behind the second funnel and on the quarterdeck. Although much smaller and slower than her British contemporaries, she was soundly built and had a high freeboard and tall bridge, making her a useful vessel. She was lost off the Dardanelles after a collision with the Acorn-/H-class destroyer Hope on 23 March 1918.

Bibliography

• Destroyers of the Royal Navy, 1893-1981, Maurice Cocker, 1983, Ian Allan, ISBN 0-7110-1075-7
• Jantzen, Ulrigh; Matis, Richardo Graca (1998). "Origins of Portuguese Destroyer Liz". Warship International. XXXV (1): 105–106.