DAVID SCOTT’s unusually interesting naval career led to participation in a number of famous events. He served in ten submarines in peace and war, commanding five of them. His most demanding period was probably when second-in-command of the Seraph.

This submarine, with the celebrated Bill Jewell in command, had not only a successful record in sinking shipping in dangerous Mediterranean waters but also a reputation for clandestine operations. It was Seraph that landed General Mark Clark on the Algerian coast for consultations with French authorities prior to the North African invasion, and smuggled General Giraud out of the South of France to join the Allies in Algiers. She made several supply drops for Italian partisans and survived many depth charge attacks, including one direct hit.

But Operation Mincemeat in 1943 provided the most unconventional and dramatic story, indeed one that has featured in novel and film as The Man Who Never Was. Scott believed that a large canister embarked at Holy Loch in Scotland was “optical instruments”, as marked, until, off the Spanish port of Huelva, it was revealed that it contained a body dressed as a major of Royal Marines. The body, of a man who had died of pneumonia, exhibited, Mincemeat’s planners were assured by the renowned pathologist Sir Bernard Spilsbury, exhibited all the characteristics of drowning. On it were carefully devised high-level documents purporting to show that the Allies were planning to invade Southern Europe through Greece, while holding Sardinia and Corsica.

With Scott on the bridge and Jewell on the upper-deck casing with two officers to assist — the remainder of the crew being kept in ignorance — Seraph crept close inshore in the dark and launched this “courier” together with a half-inflated RAF life raft. The documents found their way to the Germans, altering their plans to reinforce Sicily, the true invasion point.

William David Scott was born in 1921, and joined the Royal Navy in 1938. At sea in the battleship Revenge at the outbreak of war, he took part in convoy operations and the bombardment of Cherbourg, during the period when invasion threatened. Transferring to submarines, he served in three small and old-fashioned boats before his time in Seraph. His first command was the submarine Umbra, training new commanding officers, and then, towards the end of the war, Vulpine and Satyr.

In 1946, as second-in-command of the destroyer Volage, he received a C-in-C’s commendation for his courage and coolness when his ship was mined by the Albanians in the Corfu Channel disaster. In May a force of British warships had passed between Corfu and the mainland and had been fired on by Albanian shore batteries, prompting an angry diplomatic response. A second force of two cruisers and two destroyers was consequently sent through the channel in order to demonstrate legal rights.

While in international waters, the destroyer Saumarez struck a mine which blew off her bow and started an enormous fire which accounted for most of her 36 killed. Saumarez was taken in tow, stem first, by Volage, who herself hit a mine shortly afterwards, her crew sustaining eight deaths. By superb seamanship, Volage managed to tow Saumarez to Corfu. At the International Court at The Hague, Britain was awarded damages of £843,000 — which have never been paid.

Scott next commanded the Meteorite, an ex-German U-boat driven by high test peroxide (or HTP) which conferred high underwater speed with no need for air, but which was, in sober terms, a death trap. A number of explosions eventually proved that HTP was not a suitable propellant for submarines or torpedoes.

In 1948 he was appointed flag lieutenant to the C-in-C Far East Fleet and was on the fringes of the famous escape of the frigate Amethyst from under the guns of the Chinese Communists on the Yangtse river. This unfortunate entanglement resulted in damage and casualties to four naval ships before Amethyst made her exit. Because she had destroyed all her secret radio codes against capture, Scott’s contribution was to devise and signal to Amethyst a “ one-time pad” encryption system based on her nominal crew list which was fortunately available at both ends.

In the next ten years Scott led the midget submarine development unit, undertook staff and training duties and commanded a frigate and two submarines. In the Andrew in 1953 he achieved the first submerged transatlantic crossing by a diesel submarine, a protracted test of snort mast breathing and of the crew’s patience — near-surface dived passages are not comfortable in submarines.

In 1962 his course at the US Naval War College was the start of a warm relationship with the US Navy. He then commanded a submarine squadron and the depot ship and, after a tour in the Admiralty, the guided missile destroyer Fife. While in Fife, he made a circumnavigation of the globe.

Promoted rear-admiral in 1971, he was posted to Washington as the head of the British naval mission, forming useful relations with politicians, with Pentagon officials and a friendship with the charismatic US Navy chief, Admiral Elmo Zumwalt.

On return home in 1973 he was appointed deputy controller of the Polaris programme, Britain’s submarine-borne nuclear deterrent. At this time, the post reported to the Navy Board member responsible for equipment procurement, the Controller of the Navy, and had no oversight of scientific aspects.

Soviet anti-missile defence improvements had prompted a debate about improving the penetrativity of Polaris. Purchase of the American Poseidon missile was rejected on cost and arms control treaty considerations. It was finally decided to embark on a home-grown programme to produce a new missile re-entry vehicle, code-named Chevaline.

After exhausting other avenues, Scott blew the whistle on the Chevaline development to the First Sea Lord on the grounds that cost and time had not been properly evaluated and that certain facts had been concealed. By 1976 the cost had doubled to £600 million; it was eventually to cost over £1billion at contemporary values.

As a result the department was reorganised; Scott became chief Polaris executive, reporting to the First Sea Lord and with responsibility for both scientific and naval aspects. His involvement with Polaris was to last for an unprecedented seven years. He was appointed CB in 1974 and KBE in 1977.

Retiring in 1980, he became a director of Civil and Marine , a sea-dredged aggregates company, with which he remained involved up to his death. Scott was a popular officer noted for his gentlemanly way with subordinates and his sharp sense of humour.

He is survived by his wife Pamela, whom he married in 1952, and their son and two daughters.

Rear-Admiral Sir David Scott, KBE, CB, wartime submariner and chief Polaris executive, 1976-80, was born on April 5, 1921. He died on January 20, 2006, aged 84.