Whatever the rights and wrongs of commerce raiding, any last doubts about the value of torpedo-equipped submarines vanished in 1914, less than two months after the outbreak of war, when Germany’s U-9, commanded by a 32-year-old on his first tour of duty, hit HMS Aboukir with a torpedo and she sank before the lifeboats could be lowered. HMS Cressy lowered her boats to pick up men in the water, but while so doing was hit by a second torpedo. A third torpedo hit HMS Hogue, which also sank immediately. More than 1,600 sailors died. About three weeks later the same rather primitive type of submarine sank the cruiser HMS Hawke.
The development of wireless was changing naval warfare, as it was changing everything else. The admirals seized upon it, for it gave the men behind desks the means of controlling the units at sea. Intelligence officers saw that enemy ships transmitting wireless signals could be located by direction-finding apparatus. Better still, such radio traffic could be intercepted, the codes broken, and messages read.
Intercepted wireless signals played a part in the battle of Jutland in 1916, when Britain’s Grand Fleet and the German High Seas fleet clashed in the only modern battleship action fought in European waters. Lack of flash doors caused HMS Queen Mary to disappear in an explosion, HMS Indefatigable blew up and sank leaving only two survivors, and HMS Lion was only saved because a mortally wounded turret commander ordered the closing of the magazine doors. The loss of the Royal Navy’s three battle cruisers and three armoured cruisers could all be ascribed to their inadequate upper protection.
There were many ways to evaluate the battle of Jutland, and both sides celebrated a victory with all the medals and congratulatory exchanges that victory brings for the higher ranks. In tonnage and human lives lost the British suffered far more than the Germans, but the Royal Navy was more resilient. The British were seafarers by tradition, and regular long-service sailors who fought the battle accepted its horrors in a way that conscripted German sailors did not. Britain’s Grand Fleet took its sinkings philosophically. Within a few hours of returning to Scapa Flow and Rosyth, the fleet reported itself ready to steam at four hours’ notice.
There can be no doubt however that Britain’s technological shortcomings were startlingly evident at Jutland. Once the envy of all the world, Britain’s steel output had now sunk to third place after the United States and Germany, and German steels were of higher quality. Anyone studying the battle had to conclude that German ships were better designed and better made, that German guns were more accurate and German shells penetrated British armour while many of the Royal Navy’s hits caused little damage.
Radio had also played a part in the battle. Helped by codebooks the Russians salvaged from a sunk German cruiser, the men in Room 40 at the Admiralty ended the war able to read all three German naval codes. After the war the work in Room 40 was kept completely secret so that even the official history made only passing mention of it.
By the end of 1916, despite patrols by planes, dirigibles and thousands of ships, U-boats had sunk 1,360 ships. The German U-boat service, which grew to 100 submarines, had lost only four of them to enemy action. The Admiralty stubbornly refused to inaugurate a convoy system, and produced rather bogus figures to ‘prove’ that convoys would block up the ports and harbours. Convoys might never have been started but for the French government insisting that their cross-Channel colliers sailed in convoy. The result was dramatic but the Admiralty remained unconvinced. Perhaps the Admiralty officials thought that escorting dirty old merchant ships was not a fitting task for gallant young naval officers. Whatever their reasons, it took an ultimatum from the prime minister to make them change their minds. (Although later the admirals petulantly said they were about to do it anyway.) When convoys began in May 1917, only ships that could do better than 7 knots, and could not attain 12 knots, were allowed to join them. Losses fell about 90 per cent. The British had come close to losing the war, and before the effect of the convoy system became evident the nerve of the first sea lord, Admiral Jellicoe, broke. On 20 June he told a high-level conference that, owing to the U-boats, Great Britain would not be able to continue the war into 1918. He proved wrong and, thanks to the convoys, the crisis abated.
German U-boats continued sinking passenger ships even after negotiations for peace began on 3 October 1918. The following day Hiramo Maru was sunk off the Irish coast, killing 292 out of the 320 aboard. The following week the Irish mail boat Leinster was torpedoed without warning and torpedoed again while it was sinking: 527 drowned. ‘Brutes they were, and brutes they remain,’ said Britain’s foreign secretary. President Wilson warned that America wouldn’t consider an armistice so long as Germany continued its ‘illegal and inhuman practices’. The U-boat’s Parthian shots had not helped to create a climate suited to negotiations for a lasting peace.
By the time the First World War ended, about 200 U-boats had been sunk, but the submarine menace had been countered only by means of escorted convoys and the use of about 5,000 ships, hundreds of miles of steel nets and a million depth charges, mines, bombs and shells. Yet for those who wanted to find it, the most important lesson of the 1914–18 war in the Atlantic lay in the statistics. In the whole conflict only five ships were sunk by submarines when both surface escort and air patrol was provided, and this despite the fact that no airborne anti-submarine weapon had been developed.
The man who with undaunted toils
Sails unknown seas to unknown soils
With various wonders feasts his sight:
What stranger wonders does he write!
John Gay, ‘The Elephant and The Bookseller’
By the end of the First World War Britain was exhausted, financially bankrupt and in debt to the USA. The Empire, having made a selfless and spontaneous commitment to the war, no longer wanted to be ruled by men of Whitehall. British leaders, both civilian and military, had proved inept in conducting a war which, had the United States not entered it, Germany might well have won.
In 1922, Britain formally acknowledged her declining power. Since Nelson’s day Britain’s declared policy was to have a navy as strong as any two navies that could possibly be used against her. Even into the 1890s Britain was spending twice as much on her fleet as any other nation. With the Washington treaty of 1922 such days were gone. The politicians agreed that the navies of Britain, USA and Japan should be in the ratio of 5:5:3. Britain also accepted limitations upon the specifications of its battleships, and promised not to develop Hong Kong as a naval base and to withdraw altogether from Wei-hai-wei, China. In conforming to the treaty, the Royal Navy scrapped 657 ships including 26 battleships and battle-cruisers. One history of the British Empire comments: ‘So ended Britain’s absolute command of the seas, the mainstay and in some sense the raison d’être of her Empire.’1
After the First World War, the surrendered German fleet sailed to Scapa Flow, between Orkney