In September 1943, the 20-year-old Aitken served on one of six, revolutionary X-class mini-subs on a daring mission, Operation Source, at Ka Fjord in occupied Norway to disable the moored 40,000-ton German battleship Tirpitz: scourge of Allied shipping. Three of the submarines, X-8, X-9 and X-10 were lost before the attack had even started.
After navigating a minefield and a swathe of anti-sub netting, two of the vessels – X-6 and Aitken’s X-7 – placed four, two-ton charges on the ship’s stern, which caused so much damage it was unable to sail again. X-5 and her crew was lost during the attack, probably suffering a direct hit by Tipritz's guns.
However, as X7 fled the scene, it surfaced to avoid the netting and was spotted and fired upon by Tirpitz crewmen. Two of X7’s crew perished (Sub-Lt Whittam and Engine Room Artificer Whitley) and Aitken was forced to exit the vessel – ironically becoming a captive on the very ship he had sought to cripple. He spent the rest of the war interned at the Marlag-Milag Nord prison camp, but received his DSO in 1944. The Captain of the X7, Lieutenant Godfrey Place was decorated with the Victoria Cross.
The Germans had almost finished repairs on Tirpitz when it was attacked by carrier-born dive bombers in April 1944 and was finally sunk when bombed by RAF Lancaster bombers in November 1944.
His Majesty has also been graciously pleased to give orders for the following appointments to the Distinguished Service Order to approve the following award for gallantry, skill and daring during the successful attack by his Majesty's Midget Submarines X7 and X6 on the Tirpitz.
Aitken was held at Marlag Nord at Westertimke for 6 months, before the camp was liberated by the British 11th Armoured Division in April 1945. In that time he attempted to escape on two separate occasions by tunnel, but both were unsuccessful due to the tunnels collapsing when attempting to go under the anti-tunnelling ditch that the Germans had dug around the camp.
In June 1945 Aitken was one of 23 article clerks and 19 members invited to Chartered Accountants Hall by the President and Vice-president to celebrate their release from captivity
Aitken, born in Norwich in 1923, had been educated at Oundle School and was articled, in February 1941, to George Pierson of Edward Thomas Pierson & Sons of Coventry. Having interrupted his accountancy training to serve, Aitken completed it after the war, passing his final examination in May 1949.
Once qualified Aitken made the most of his qualification and eventually became the financial officer at an agricultural engineering firm (R H Hunt & Co) in Earl's Colne, Essex, owned by the father of his wife Anne, who he married in 1951. He died in 2014 aged 91.
The Tirpitz raid was immortalised in the 1955 film Above Us the Waves, in which Aitken was played by Donald Sinden.
The wreckage of X-7 was raised from the fjord in 1976 and is now is on display in the Imperial War Museum in Duxford. The only remaining intact X-Craft that saw action, X-24, is on display at the Royal Navy Submarine Museum in Gosport, part of the Portsmouth Historic Dockyard.
Further reading
- Robert Aitken: X Craft diver (interview on RN Subs website)
- Sub-Lieutenant Robert Aitken (obituary in The Independent)