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| HMS Hermes (1924) | |
|---|---|
| Ship name | HMS Hermes |
| Ship caption | HMS Hermes underway in the 1930s |
| Ship country | United Kingdom |
| Ship builder | Cammell Laird |
| Ship laid down | 1922 |
| Ship launched | 1924 |
| Ship commissioned | 1924 |
| Ship decommissioned | 1942 |
| Ship displacement | ~11,000 tons |
| Ship length | 660 ft |
| Ship beam | 70 ft |
| Ship propulsion | Parsons turbines |
| Ship speed | 25 kn |
| Ship armament | Various anti-aircraft and anti-ship guns |
| Ship aircraft | Fixed-wing carrier complement |
HMS Hermes (1924) was a British aircraft carrier completed between the two world wars and active in Royal Navy service through the early years of World War II. Built by Cammell Laird and intended to operate embarked biplane squadrons, she served on global stations including the Atlantic Ocean, Mediterranean Sea, and Indian Ocean before being lost during the Indian Ocean raid (1942)-era operations. Hermes's career intersected with interwar naval treaties, evolving carrier doctrine, and major wartime campaigns in the Eastern Fleet theatre.
Ordered under the post-World War I naval expansion, Hermes was designed as a purpose-built aircraft carrier rather than a conversion, reflecting lessons from the Battle of Jutland and studies by the Admiralty. Constructed at Cammell Laird shipyard in Birkenhead, she incorporated a flush flight deck, island superstructure, and hangars to operate Fairey Flycatcher-era types and later Fairey Fulmar, Blackburn Skua, and Supermarine Seafire derivatives. Her machinery—Parsons steam turbines fed by oil-fired boilers—gave a nominal 25-knot speed intended to match battlecruiser and cruiser formations; armour and armament balanced protection against destroyer action and aerial attack with weight limits set by postwar Washington Naval Treaty-era restrictions. Designers from the Admiralty Naval Staff and the Directorate of Naval Construction debated hangar height, arrester gear, and aviation fuel handling in response to operational reports from the Royal Naval Air Service and the Fleet Air Arm.
After commissioning Hermes joined training and fleet exercises with the Home Fleet and later deployed to the Mediterranean Fleet, conducting joint manoeuvres with units from HMS Hood and HMS Warspite and visiting ports including Gibraltar, Alexandria, and Malta. During the interwar years she hosted trials of carrier operating techniques influenced by aviators from the Royal Air Force and observers from the Imperial Japanese Navy and United States Navy; notable officers and aviators connected to her programmes included personnel seconded from the Fleet Air Arm and the Air Ministry. Hermes participated in diplomatic cruises to the South Atlantic and the Indian Ocean, showing the White Ensign at colonial ports such as Cape Town, Mombasa, and Trincomalee, and took part in fleet reviews attended by figures from the British Royal Family and ministers from the Foreign Office.
With the outbreak of World War II Hermes was assigned to convoy protection and aircraft support missions, escorting merchant ship convoys and hunting U-boat threats in concert with escorting destroyer flotillas and Royal Air Force reconnaissance. She supported operations in the South Atlantic and later transferred to the Eastern Fleet based in Ceylon (now Sri Lanka), where strategic concerns about Imperial Japan prompted redeployments of carriers including HMS Indomitable and HMS Illustrious. Hermes's air groups performed anti-submarine patrols and provided air cover during evacuations and amphibious operations, coordinating with Admiral James Somerville's command and the British Pacific Fleet elements passing through the theatre. Intelligence from Ultra and signals units informed convoy routing, but logistical constraints and the rise of Japanese carrier and land-based aircraft threats complicated defensive planning.
In April 1942 Hermes came under repeated air attack by Imperial Japanese Navy Air Service units operating from carriers and land bases during offensive operations that followed the Indian Ocean raid and the Malayan Campaign. Escorted by cruisers and destroyers, Hermes sustained bomb and torpedo damage from dive bombers and torpedo bombers despite anti-aircraft fire from her crew and escorting ships. On 9 April 1942 she was struck and set aflame; subsequent attacks and progressive flooding led to her sinking east of Ceylon while attempts at damage control were hampered by loss of power and aviation fuel fires. Survivors were rescued by accompanying ships and by local units; many were taken to naval hospitals in Colombo and Trincomalee and repatriated to United Kingdom medical and personnel commands. The loss prompted inquiries within the Admiralty and influenced carrier deployment doctrine in the Indian Ocean.
Hermes's sinking highlighted risks to carriers operating without sufficient fleet air cover against coordinated carrier task force strikes and reinforced lessons being learned by the Royal Navy, United States Navy, and other navies about combined-arms anti-aircraft defence and fleet disposition. Artefacts salvaged by postwar teams and private divers have been catalogued by maritime museums and research groups associated with institutions such as the National Maritime Museum and regional heritage bodies in Sri Lanka. Scholarly analysis of Hermes's service appears in naval histories covering the Eastern Fleet, the Indian Ocean, and carrier evolution between the wars; her design and loss inform comparative studies involving HMS Ark Royal (1938), HMS Courageous, and interwar carriers of the Imperial Japanese Navy. Memorials to crew lost in her sinking are maintained at naval cemeteries and commemorative sites linked to the Commonwealth War Graves Commission and local remembrance organizations.
Category:Aircraft carriers of the Royal Navy Category:Ships built on the River Mersey Category:World War II shipwrecks in the Indian Ocean