In World War I, Duquesne spied for Germany, earning the Iron Cross for allegedly sinking the HMS Hampshire thereby killing Lord Kitchener in 1916.

Promoted to Captain, he was given command of HMS Iron Duke in 1939.

* HMS Iron Duke, Royal Navy

The Type 23's medium range radar will be replaced by BAE Systems Insyte Artisan 3D radar with the first vessel, HMS Iron Duke receiving its new radar in 2012-2013.

Three ships of the British Royal Navy have been named HMS Iron Duke after the Duke of Wellington, nicknamed the " Iron Duke ".

* HMS Iron Duke ( 1870 ) was a battleship launched in 1870, paid off in 1893 and sold 1906 for scrap

* HMS Iron Duke ( 1912 ) was the name-ship of a class of battleships, launched in 1912 and sold in 1946 as a coal hull ( and scrapped ).

* HMS Iron Duke ( F234 ) is a Type 23 frigate launched in 1991

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However, on the outbreak of World War I some months before that, when Callaghan was at sea on his flagship, the battleship HMS Iron Duke, his successor-designate Sir John Jellicoe received orders to immediately relieve the aging Callaghan of command of the fleet.

* HMS Benbow was an Iron Duke-class battleship launched in 1913.

One consequence of the change was that Beatty chose to transfer the role of fleet flagship from HMS Iron Duke to Queen Elizabeth, which had been Evan-Thomas ' flagship as part of the squadron of the five fastest fleet battleships.

St John's, Langrish ; Robinson's headstone in lower left cornerFollowing this period of extended service, Robinson was brought home, appointed Officer of the Order of the British Empire by the King for his Caspian Sea service, promoted again to Captain and posted to HMS Iron Duke.

Educated locally in Blackheath, Travis joined the Royal Navy in 1906 as a Paymaster officer, and served on HMS Iron Duke.

Otto Weddigen was awarded the Iron Cross and, after sinking HMS Hawke and some merchant ships, Prussia's highest military order, the Pour le Mérite.

Beatty was instead appointed to HMS Alexandra, flagship in the Mediterranean Squadron commanded by Admiral the Duke of Edinburgh's, Queen Victoria's second son.

* HMS Duke of Wellington, at least two ships

On 23 October 1986, the Duke of York ( as he was by then ) transferred to the General List, enrolled in a four-month helicopter warfare instructor's course at RNAS Yeovilton, and, upon graduation, served from February 1987 to April 1988 as a helicopter warfare officer in 702 Naval Air Squadron, RNAS Portland, as well as on HMS Edinburgh as an Officer of the Watch and Assistant Navigating Officer until 1989, including a six-month deployment as part of exercise Outback 88 to the Far East.

The Duke of York served as flight commander and pilot of the Lynx HAS3 on HMS Campbeltown from 1989 to 1991, during which he also acted as Force Aviation Officer to Standing NRF Maritime Group 1 while the Campbeltown was flagship of the NATO force in the North Atlantic from 1990 to 1991.

* HMS St Albans is a Type 23 Duke class frigate.

* was a 90-gun three-decker second-rate launched in 1678, sunk in 1703 but raised in 1704, rebuilt twice and renamed HMS Duke in 1728.

Since that time, all of the HMS Monmouths have had their names painted in black and the name and the creat are covered because of the shame of the Duke of Monmouth's execution.

Today the officers of the latest HMS Monmouth carry black handkerchiefs and the ship is known as the Black Duke.

In 1768 at the fairly late age of 22, the Duke entered the Royal Navy as a midshipman and was sent to Corsica in HMS Venus.

* HMS Warrior was a Duke of Edinburgh class armoured cruiser launched in 1905.

Five ships of the Royal Navy have been named HMS Norfolk, after the Duke of Norfolk or the county of Norfolk.

Two ships of the Royal Navy have borne the name HMS Duke of York, after numerous holders of the title of Duke of York:

* HMS Duke of York was a King George V-class battleship launched in 1940, and broken up in 1958.

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In addition, one ship of the Royal Navy has carried the similar name HMS Duke of Edinburgh.

* One of the planned CVA-01 aircraft carriers of the 1960s was tentatively named HMS Duke of Edinburgh but the design was never constructed.

Eleven ships of the British Royal Navy have been named HMS Kent, after the county of Kent and the Duke of Kent.