HMS Cressy was a Cressy-class armoured cruiser built for the Royal Navy around 1900. Upon completion she was assigned to the China Station. In 1907 she was transferred to the North America and West Indies Station before being placed in reserve in 1909. Recommissioned at the start of World War I, she played a minor role in the Battle of Heligoland Bight a few weeks after the beginning of the war. Cressy, together with two of her sister ships, was sunk by the German submarine U-9 on 22 September 1914 with the loss of 560 of her crew.
On the morning of 22 September, Cressy and her sisters, Aboukir and Hogue, were on patrol without any escorting destroyers as these had been forced to seek shelter from bad weather. The three sisters were steaming in line abreast about 2,000 yards (1,800 m) apart at a speed of 10 knots (19 km/h; 12 mph). They were not expecting submarine attack, but had lookouts posted and one gun manned on each side to attack any submarines sighted. The weather had moderated earlier that morning and Tyrwhitt was en route to reinforce the cruisers with eight destroyers.
U-9, commanded by Kapitänleutnant Otto Weddigen, had been ordered to attack British transports at Ostend, but had been forced to dive and take shelter from the storm. On surfacing, she spotted the British ships and moved to attack. She fired one torpedo at 06:20 at Aboukir which struck her on the starboard side; the ship’s captain thought he had struck a mine and ordered the other two ships to close to transfer his wounded men. Aboukir quickly began listing and capsized around 06:55 despite counterflooding compartments on the opposite side to right her.
As Hogue approached her sinking sister, her captain, Wilmot Nicholson, realized that it had been a submarine attack and signaled Cressy to look for a periscope although his ship continued to close on Aboukir as her crew threw overboard anything that would float to aid the survivors in the water. Having stopped and lowered all her boats, Hogue was struck by two torpedoes around 06:55. The sudden weight loss of the two torpedoes caused U-9 to broach the surface and Hogue’s gunners opened fire without effect before the submarine could submerge again. The cruiser capsized about ten minutes after being torpedoed and sank at 07:15.
Cressy attempted to ram the submarine, but did not succeed and resumed her rescue efforts until she too was torpedoed at 07:20. Weddigen had fired two torpedoes from his stern tubes, but only one hit. U-9 had to maneuver to bring her bow around with her last torpedo and fired it at a range of about 550 yards (500 m) at 07:30. The torpedo struck on the port side and ruptured several boilers, scalding the men in the compartment. As her sisters had done, Cressy took on a heavy list and then capsized before sinking at 07:55. Several Dutch ships began rescuing survivors at 08:30 and were joined by British fishing trawlers before Tyrwhitt and his ships arrived at 10:45. From all three ships 837 men were rescued and 62 officers and 1,397 enlisted men lost: 560 of those lost were from Cressy.
In 1954 the British government sold the salvage rights to all three ships to a German company and they were subsequently sold again to a Dutch company which began salvaging the wrecks’ metal in 2011