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| HMS L24 | |
|---|---|
| Ship name | HMS L24 |
| Ship class | L-class submarine |
| Ship builder | Vickers, Barrow-in-Furness |
| Ship launched | 1918 |
| Ship commissioned | 1919 |
| Ship decommissioned | 1930s |
| Ship tonnage | 914 LT surfaced |
| Ship length | 238 ft |
| Ship beam | 23 ft |
| Ship draught | 13 ft |
| Ship propulsion | Diesel engines; electric motors |
| Ship speed | 17 kn surfaced; 10.5 kn submerged |
| Ship range | 3,800 nmi at 10 kn |
| Ship complement | 35 |
| Ship armament | 6 × 21 in bow torpedo tubes; 2 × 18 in broadside tubes; 1 × 4 in deck gun |
HMS L24 was a British Royal Navy L-class submarine built during the late stages of World War I and completed too late for wartime service. As part of the post-war Royal Navy submarine force she served during the interwar period, reflecting advances in diesel-electric propulsion, undersea warfare doctrine and naval architecture between the Dreadnought era and the Second World War. Her career illustrates peacetime operations, training duties, and the evolution of submarine tactics employed by the Admiralty and the Home Fleet.
The L-class program originated from requirements set by the Admiralty in response to lessons learned during the First World War and the Battle of Jutland, prompting new designs from shipyards such as Vickers, Chatham Dockyard, John Brown & Company, and Barrow-in-Furness. Naval architects influenced by figures like Sir John Fisher and engineers from Harland and Wolff sought greater underwater endurance, larger torpedo loads, and improved habitability compared with earlier E-class and H-class boats. L24 was laid down at Vickers’ Barrow yard, where industrial practices established by managers during the Industrial Revolution and innovations from firms such as Cammell Laird converged. Construction incorporated lessons from engagements like the U-boat Campaign (1914–1918) and patrol experiences in the North Sea, with hull form, battery arrangement and ballast systems refined to standards influenced by contemporary designs from United States Navy yards and German Kaiserliche Marine advances.
L24’s dimensions and machinery matched the later L-class pattern adopted across the class produced by builders including Vickers-Armstrongs and Sir W G Armstrong Whitworth & Company. She displaced about 914 LT surfaced and 1,089 LT submerged, with an overall length near 238 ft and a beam around 23 ft, supporting a complement typically numbering in the mid-30s drawn from crews recruited via HMS Ganges training establishments and rated seamen trained at Portsmouth and Gosport. Propulsion comprised two diesel engines for surface speed and electric motors for submerged operations, reflecting diesel-electric systems promoted by pioneers such as Sir Charles Parsons and tested against doctrines from Admiral Sir John Jellicoe. Armament featured six 21-inch bow torpedo tubes and two 18-inch broadside tubes plus a 4-inch deck gun used in patrols similar to operations conducted by vessels assigned to the Grand Fleet and later Home Fleet exercises.
Commissioned after the armistice, L24 joined peacetime flotillas serving under commands associated with bases at Portsmouth, Pembroke Dock, and the Fleet Reserve at Rosyth. She participated in training cruises, fleet exercises and anti-submarine warfare trials influenced by interwar developments in ASDIC technology promoted by researchers from Admiralty Research Laboratory and trialled alongside surface ships such as destroyers from HMS Hood’s flotilla and cruisers like HMS Exeter. Crewmembers underwent instruction at schools including Royal Naval College, Greenwich and the Submarine School at HMS Dolphin, while officers rotated through sea commands as part of career pathways overseen by the Naval Staff and personnel policies set by the Board of Admiralty.
Although L24 saw no major combat, she took part in interwar exercises and goodwill visits that mirrored the Royal Navy’s forward presence traditions upheld during visits to ports like Malta, Aden, Gibraltar, Alexandria, and Valletta. She featured in tactical evaluations addressing threats analogous to those posed by German Reichsmarine submarines and emerging continental navies after the Washington Naval Treaty (1922). L24 also participated in coordinated training with aircraft from naval air stations such as RNAS Lee-on-Solent and HMS Furious-affiliated units, contributing to combined-arms ASW doctrine later employed during the Norwegian campaign and Battle of the Atlantic developments that informed strategies of commanders like Admiral Sir Andrew Cunningham.
With rapid technological progress during the 1920s and fiscal constraints following the Washington Naval Treaty and the Ten Year Rule, older L-class boats were gradually withdrawn. L24 was paid off and placed in reserve as newer O-class and T-class submarines entered service under programs directed by the Director of Naval Construction. She was sold for scrap and broken up in the interwar period, a fate shared by many contemporaries following peacetime reductions overseen by the Ministry of Defence’s predecessors and disposal practices common to yards including Swan Hunter and Thos. W. Ward.
Category:British L-class submarines Category:Royal Navy submarines Category:1918 ships