HMS Adventure (M23): The Minelayer Whose Own Stern Sabotaged Her

A First Attempt at a New Idea

HMS Adventure holds a genuinely significant place in naval engineering history: she was the Royal Navy's first purpose-built minelaying cruiser, and the first Royal Navy warship to use diesel engines for cruising, an ambitious combination of steam turbines for speed and diesels for long, economical range. Ordered on 18 July 1921 and built by Vickers at Barrow-in-Furness with further work at Devonport, she was laid down on 29 November 1922, launched on 18 June 1924, and commissioned on 2 October 1926.

Being first at something new tends to come with teething problems, and Adventure had a particularly memorable one. Her designers gave her a flat transom stern intended to improve efficiency, but in practice it created an area of dead water directly behind the ship that had a habit of sucking newly laid mines straight back into the hull rather than letting them drop cleanly away. It is hard to imagine a more fundamental design flaw for a ship whose entire purpose was laying mines, and the Navy eventually had to rebuild her with a conventional rounded stern to fix it, during a refit in the early 1930s.

An Early War, and an Early Wound

After a spell with the Atlantic Fleet and a tour on the China Station in the late 1930s, Adventure went straight to work when war broke out, laying mines in home waters almost immediately. Between 11 and 16 September 1939, working alongside the coastal minelayer Plover and two converted train ferries, and escorted by the cruiser Cairo, she helped lay over 3,000 mines in the Straits of Dover.

Her own turn to suffer from mines came just two months later. On the night of 12 to 13 November 1939, Adventure struck a German magnetic mine near the Tongue Light Vessel in the Thames Estuary, an explosion that wrecked her bridge and killed or fatally injured 23 of her crew. It took roughly a year of repair work at Chatham Dockyard to get her back into service, a sobering reminder that a ship built to sow mines was every bit as vulnerable to them as anyone else.

Back in Action, and Mined Again

Adventure returned to service in October 1940, only to be damaged by another mine in Liverpool Bay in January 1941, this time keeping her out of action for five months. She was, by this point, developing something of a habit. Once repaired, she took part in Operation EF in July 1941, an Arctic raid against Kirkenes and Petsamo carried out in support of the newly invaded Soviet Union, arriving in Murmansk on 1 August with a cargo of parachute mines.

Her wartime service kept diversifying from there. In February 1942 she suffered collision damage in the Clyde, requiring another three months of repairs, before returning in June to act as a decoy for the ill-fated Arctic convoy PQ 17 during Operation ES. Over the following winter she ran supply missions to Gibraltar and into the Mediterranean, and in April 1943 took part in the operation that caught and sank the German blockade runner Irene off the Spanish coast.

From Minelayer to Mechanic

By November 1943, with her minelaying days effectively behind her, Adventure was converted into a tender and repair ship for landing craft, a sensible reuse of a large, capable hull as the Allies began planning the invasion of Europe in earnest. She earned her keep in this new role during the Normandy landings in June 1944, deployed off the artificial Mulberry B harbour as a support and repair vessel, landing parties on 19 June to carry out extensive salvage work on landing craft damaged in the fighting and the notoriously rough Channel weather that struck shortly after the invasion began.

A Quiet End

Formally reclassified as a repair ship in 1944, Adventure was reduced to reserve in 1945 as the war wound down, her unusually varied career, minelayer, mine victim, Arctic raider, convoy decoy, and finally repair ship, finally at an end. She was sold to the shipbreakers Thos. W. Ward in 1947 and broken up at Briton Ferry, a quiet conclusion for a ship whose very first outing had been undermined by her own stern.