HMS Hermes was a Highflyer-classprotected cruiser built for the Royal Navy in the 1890s. She spent much of her early career as flagship for various foreign stations before returning home in 1913 to be assigned to the reserve Third Fleet. The ship was modified later that year as the first experimental seaplane carrier in the Royal Navy. In that year's annual fleet manoeuvers, she was used to evaluate how aircraft could cooperate with the fleet and if aircraft could be operated successfully at sea for an extended time. The trials were a success and Hermes was paid off in December at their conclusion. She was recommissioned at the beginning of World War I in August 1914 for service as an aircraft ferry and depot ship for the Royal Naval Air Service. She was torpedoed and sunk by a German submarine in the Straits of Dover that October, with the loss of 21 lives.
Hermes was designed to displace5,650 long tons (5,740t). The ship had an overall length of 372 feet (113.4m), a beam of 54 feet (16.5m) and a draught of 29feet 6inches (9.0m). She was powered by two 4-cylinder triple-expansion steam engines, each driving one shaft, which produced a total of 10,000 indicated horsepower (7,500kW) designed to give a maximum speed of 20 knots (37km/h; 23mph). Hermes reached a speed of 20.5 knots (38.0km/h; 23.6mph) from 10,224ihp (7,624kW), during her sea trials. The engines were powered by 18 Belleville boilers.[1] She carried a maximum of 1,125 long tons (1,143t) of coal and her complement consisted of 470 officers and ratings.[2]
The ship's protective deck armour ranged in thickness from 1.5 to 3 inches (38 to 76mm). The engine hatches were protected by 5-inch (127mm) of armour. The main guns were fitted with 3-inch gun shields and the conning tower had armour 6 inches thick.[1]
Construction and service
A Short Folder seaplane being hoisted aboard in 1913
She was assigned to the Channel Fleet until 1905 when she was reduced to reserve at Portsmouth Royal Dockyard. The ship was recommissioned the following year as the flagship of the East Indies station, but she became the flagship of the Cape of Good Hope Station in 1907. Hermes returned home in March 1913 and was reduced to reserve as part of the Nore Command the next month.[12]
Work began to modify her to accommodate three seaplanes in April to evaluate the use of aircraft in support of the fleet. Her forward 6-inch gun was removed and a tracked launching platform was built over the forecastle. A canvas hangar was fitted at the aft end of the rails to shelter the aircraft from the weather and a derrick was rigged from the foremast to lift the seaplane from the water. The guns on the quarterdeck were removed to allow for a seaplane to be stowed there in another hangar. A third aircraft could also be carried amidships, exposed to the elements. Three storage lockers were fitted with a total capacity of 2,000 imperial gallons (9,100l; 2,400USgal) of petrol in tins.[13]
Hermes was recommissioned on 7 May and loaded two unknown aircraft on 5 July, making nine flights with them before 14 July. For the trials she initially used a Borel Bo.11 and a Short Folder, but the Borel was damaged in a storm and replaced by a Caudron G.2amphibian. This latter aircraft took off successfully while the ship was moving on 28 July, but the take-off platform only seems to have been used twice during this time. During the manoeuvers, she simulated a reconnaissance Zeppelin for the Red Fleet, commanded by Vice AdmiralJohn Jellicoe. The Folder could only carry a small wireless transmitter because of weight limits and it would be launched to search for enemy ships and report back to Hermes which would retransmit its message with its more powerful transmitter. The aircraft made a total of about 30 flights before 6 October. The tests showed that aircraft required radio transmitters to usefully perform reconnaissance, that sustained use of aircraft at sea was possible and that handling aircraft aboard ship and on the sea imposed their own set of requirements that could not be met by converted land-based aircraft.[14]
The ship was paid off on 30 December,[13] but was recommissioned on 31 August 1914. Assigned to the Nore Command, she was used to ferry aircraft and stores to France.[15] It is uncertain if the flying-off platform was reinstalled.[16] On 30 October she arrived at Dunkirk with one load of seaplanes. The next morning, Hermes set out on the return journey but was recalled because a German submarine was reported in the area.[17] Despite zigzagging at a speed of 13 knots (24km/h; 15mph), she was torpedoed by U-27 at a range of 300 yards (270m).[18]Hermes sank off Ruylingen Bank in the Straits of Dover with the loss of 21 of her crew.[19] Her wreck lies upside down in approximately 30 metres (98ft) of water at coordinates 51°06′18″N1°50′18″E / 51.10500°N 1.83833°E / 51.10500; 1.83833Coordinates: 51°06′18″N1°50′18″E / 51.10500°N 1.83833°E / 51.10500; 1.83833.[20] In January 2017, two English divers were charged with failing to declare items removed from the wreck of Hermes, in contravention of the Protection of Military Remains Act 1986.[21]
Notes
↑ "Cwt" is the abbreviation for hundredweight, 12 cwt referring to the weight of the gun.
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