Naval warfare of World War I

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British battleship HMS Irresistible abandoned and sinking, 18 March 1915, during the Battle of Gallipoli

Naval warfare in World War I was mainly characterized by the efforts of the Allied Powers, with their larger fleets and surrounding position, to blockade the Central Powers by sea, and the efforts of the Central Powers to break that blockade or to establish an effective blockade of the United Kingdom and France with submarines and raiders.

1 Prelude
2 Naval technology
3 Theaters
4 See also
5 External links

[edit] Prelude

The naval arms race between Britain and Germany to build dreadnought battleships in the early twentieth century is the subject of a number of books. Germany's attempt to build a battleship fleet to match that of the United Kingdom, the dominant naval power on the nineteenth century and an island country that depended on seaborne trade for survival, is often listed as a major reason for the enmity between those two countries that led the UK to enter World War I. German leaders desired a navy in proportion to their military and economic strength that could free their overseas trade and colonial empire from dependence on Britain's good will, but such a fleet would inevitably threaten Britain's own trade and empire.

Ever since the first Moroccan crisis (over the colonial status of Morocco, between March 1905 and May 1906,) there had been an arms race, over their respective navies. However there were events leading up to this. Captain Alfred Thayer Mahan was an American naval officer, extremely interested in British naval history. In 1887 he published The Influence of Sea Power upon History. The theme of this book was naval supremacy as the key to the modern world. His argument was that every nation that had ruled the waves, from Rome to Great Britain had prospered and thrived, those that hadn’t, for example Hannibal’s Carthage or Napoleon’s France hadn’t. What he hypothesised was that what Britain had done in building a navy to control the world’s seas lanes. Other could do – indeed must do if they were to keep up were to keep up with the race for wealth and empire in the future.

[edit] Naval arms race

Mahan's thesis was highly influential and lead to an explosion of new naval construction worldwide. The American congress immediately ordered the building of three battleships (with a fourth, Iowa, to be built two years later). Japan, whose British trained navy wiped out the Russian fleet at the Battle of Tsushima, helped to reinforce the concept of naval power as the dominant factor in conflict. However the book made the most impact in Germany. The German Kaiser Wilhelm I had been brought up amongst the Royal Navy, when he visited his grandmother, Queen Victoria. His mother said “Wilhelm’s one idea is to have a Navy which shall be larger and stronger than the British navy”. In 1898 came the first German Fleet Act, two years later a second doubled the number of ships to be built, to nineteen battleships and twenty – three cruisers in the next twenty years. In another decade, Germany would go from a naval ranking lower than Austria to having the second largest battle fleet in the world. For the first time since Trafalgar, Britain had an aggressive and truly dangerous rival to worry about.

Mahan wrote in his book that not only world peace or the empire, but Britain’s very survival depended on the Royal Navy ruling the waves. Indeed the Cambridge 1895 Latin essay price was on “British Sea Power” (in Latin obviously). So the great naval review of June 1897 for the queen’s diamond Jubilee took place, it was in an atmosphere of unease and uncertainty. The question everyone wanted to know the answer to was how Britain was going to stay ahead. But Mahan couldn’t give any answers. The man who thought he could was Jackie Fisher, then Commander in Chief, Mediterranean Fleet. He believed there were "5 strategic keys to the empire and world economic system: Gibraltar, Alexandria and Suez, Singapore, the Cape of Good Hope, and the Straits of Dover." His job was to keep hold of all of them.

[edit] HMS Dreadnought

Design of the revolutionary battleship Dreadnought.

When he became First Sea Lord, Fisher began drawing up plans for a naval war against Germany. “Germany keeps her whole fleet always concentrated within a few hours of England,” he told the Prince of Wales in 1906. “We must therefore keep a fleet twice as powerful within a few hours of Germany.” He thus began work on HMS Dreadnought, launched at Portsmouth in 1906, and she made all previous warships obsolete. She had steam turbine engines, making her the fastest capital ship then afloat, capable of doing 21 knots – certainly faster than any threatening submarine. She carried ten 12 – inch guns, whereas her biggest and closest competitors carried only four. The dreadnoughts guns were emplaced in five turrets, one fore, two in wing turrets, and two aft. Fisher claimed “We shall have ten Dreadnoughts at sea before a single foreign Dreadnought is launched, and we have thirty percent more cruisers than Germany and France put together!”.

[edit] German response

SMS Nassau, Germany's first response to Dreadnought.

Admiral Alfred Tirpitz had also often visited Portsmouth as a naval cadet and admired and envied the Royal Navy. Like the Kaiser, Tirpitz believed Germany’s future dominant role in the world depended on a navy powerful enough to challenge it. He demanded large numbers of battleships. Even when Dreadnought was launched making his previously constructed 15 battleships obsolete, he believed that eventually Germany’s technological and industrial might would allow Germany to out build Britain ship for ship. Using the threat of his own resignation he forced the Reichstag to build three dreadnoughts and a battle cruiser. He also put aside money for a future submarine branch. At the rate that Tirpitz insisted upon, Germany would have thirteen in 1912, to Britain’s 16.

When this was leaked out to the British public in spring 1909, there was public outcry. The public demanded eight new battleships instead of the four the government had planned for that year. As Winston Churchill put it, “The Admiralty had demanded six ships; the economists offered four; and we finally compromised on eight”. So the pro-navy party had won – but at what cost? Tirpitz had no option but to consider Britain’s new dreadnought building program as a direct threat to Germany. He had to respond, raising the stakes further. However the commitment of funds to out-build the Germans meant Britain was abandoning any notion of a two-power standard for naval superiority. No amount of money would allow Britain to compete with Germany and Russia or the USA, or even Italy. Thus a new policy, of dominance over the world’s second leading sea power by a 60% margin went into effect. Fisher’s staff had been getting increasingly annoyed by the way he refused to tolerate any difference in opinion, and the eight dreadnought demand had been the last straw. Thus on January 25, 1910 Fisher left the admiralty. Shortly after Fisher's resignation, Churchill became First Lord of the Admiralty. Under him, the race would be continued; indeed Lloyd George nearly resigned when Churchill presented him with the naval budget of 1914 of 50 million pounds^{[citation needed]}.

By the start of the war Germany had an impressive fleet both of capital ships and submarines. Other nations had smaller fleets, generally with a lower proportion of battleships and a larger proportion of smaller ships like destroyers and submarines. France, Italy, Russia, Austria-Hungary, Japan, and the United States all had modern fleets with at least some dreadnoughts and submarines.

[edit] Naval technology

Naval technology in World War I was dominated by the battleship. Battleships were built along the dreadnought model, with several large turrets of equally sized big guns. In general terms, British ships had larger guns and were equipped and manned for quicker fire than their German counterparts. In contrast, the German ships had better optical equipment and rangefinding, and were much better compartmentalized and able to deal with damage. The Germans also generally had better propellant handling procedures, a point that was to have disastrous consequences for the British battlecruisers at Jutland.

Many of the individual parts of ships had recently improved dramatically. The introduction of the turbine led to much higher performance, as well as taking up less room and thereby allowing for improved layout. Whereas pre-dreadnought battleships were generally limited to about 12 to 17 knots, modern ships were capable of at least 24, and in the latest British classes, 28 knots. The introduction of the gyroscope and centralized fire control, the "director" in British terms, led to dramatic improvements in gunnery. Ships built before 1900 had effective ranges of perhaps 2,000 yards, whereas the first "new" ships were good to at least 8,000 yards, and modern designs to over 10,000.

One class of ship that appeared just before the war was the battlecruiser. There were two schools of thought on battlecruiser design. The first, the British design, were armed like their heavier dreadnought cousins, but deliberately lacked armor to save weight in order to improve speed. The concept was that these ships would be able to outgun anything smaller than themselves, and run away from anything larger. The German designs opted to trade slightly smaller main armament (11 inch guns compared to 13.5 or 15 inch guns in their British rivals) for speed, while keeping relatively heavy armor. They could operate independently in the open ocean where their speed gave them room to maneuver, or alternately as a fast scouting force in front of a larger fleet action.

The torpedo boat caused considerable worry for many naval planners. In theory a large number of these inexpensive ships could attack en-mass and overwhelm a dreadnought force. This led to the introduction of ships dedicated to keeping them away from the fleets, the torpedo boat destroyers, or simply destroyers. Although the mass raid continued to be a possibility, another solution was found in the form of the submarine, increasingly in use. The submarine could approach underwater, safe from the guns of both the capital ships and the destroyers (although not for long), and fire a salvo as deadly as a torpedo boat's. Limited range and speed, especially underwater, made these weapons difficult to use tactically. Submarines were generally more effective in attacking poorly defended merchant ships than in fighting surface warships, though several small to medium British warships were lost to torpedoes launched from German U-boats.

Oil was just being introduced to replace coal, containing as much as 40% more energy per volume, extending range and further improving internal layout. Another advantage was that oil gave off considerably less smoke, making visual detection more difficult. This was generally mitigated by the small number of ships so equipped, generally operating in concert with coal-fired ships.

Radio was in early use, with naval ships commonly equipped with radio telegraph, merchant ships less so. Radar was still unknown, and sonar in its infancy by the end of the war.

Aviation was primarily focused on reconnaissance, with the aircraft carrier being invented in 1918 (HMS Argus), and bomber aircraft capable of lifting only relatively light loads.

Naval mines were also increasingly well developed. Defensive mines along coasts made it much more difficult for capital ships to get close enough to conduct coastal bombardment or support attacks. The first battleship sinking in the war — that of HMS Audacious — was the result of her striking a naval mine on 27 October 1914. Suitably placed mines also served to restrict the freedom of movement of submarines.

[edit] Theaters

[edit] North Sea

v • d • e North Sea 1914-1918

1st Heligoland Bight – Live Bait Squadron – Dogger Bank – Jutland – 2nd Heligoland Bight – Zeebrugge – 1st Ostend – 2nd Ostend

The North Sea was the main theater of the war for surface action. The British Grand Fleet took position against the German High Seas Fleet. Britain's larger fleet could maintain a blockade of Germany, cutting it off from overseas trade and resources. Germany's fleet remained mostly in harbor behind their screen of mines, occasionally attempting to lure the British fleet into battle in the hopes of weakening them enough to break the blockade or allow the High Seas Fleet to attack British shipping and trade. Britain strove to maintain the blockade and, if possible, to damage the German fleet enough that British ships could be used elsewhere.

Major battles included the Battle of Heligoland Bight, the Battle of the Dogger Bank, the Battle of Jutland, and the Second Battle of Heligoland Bight. In general, Britain, though not always tactically successful, was able to maintain the blockade and keep the High Seas Fleet in port, although the High Seas Fleet remained a threat that kept the vast majority of Britain's capital ships in the North Sea.

The set-piece battles and maneuvering have drawn historians' attention but it was the blockade of German commerce through the North Sea, which ultimately starved the German people and industries into seeking the Armistice of 1918.

[edit] English Channel

Though little noticed, the naval campaign in the English Channel was of vital importance in permitting the maintenance of the British Army in France. Like the North Sea campaign, it consisted largely of maintaining minefields. In this case, the need was to exclude surface raiders but particularly submarines. The Admiralty was conscious of the submarine danger from the outset.

[edit] Atlantic

Main article: First Battle of the Atlantic

While Germany was greatly inconvenienced by Britain's blockade, Britain, as an island nation, was heavily dependent on foreign trade and imported resources. Germany found that their submarines, or U-boats, while of limited effectiveness against surface warships on their guard, were greatly effective against merchant ships, and could easily patrol the Atlantic even when Allied ships dominated the surface.

By 1915, Germany was attempting to use submarines to maintain a naval blockade of Britain by sinking cargo ships, including many passenger vessels. Submarines, however, depending on stealth and incapable of withstanding a direct attack by a surface ship, found it difficult to give warning before attacking or to rescue survivors, which meant that civilian death tolls were high. This was a major factor in galvanizing neutral opinion against the Central Powers, as countries like the United States suffered casualties and loss to their trade, and was one of the causes of the eventual entry of the US into the war.

Over time, the use of defended convoys of merchant ships allowed the Allies to maintain shipping across the Atlantic, in spite of heavy loss. This was also assisted by the entry of the US into the war and the increasing use of primitive sonar and aerial patrolling to detect and track submarines.

[edit] Mediterranean

Main article: Mediterranean naval engagements during World War I

Some limited sea combat took place between the navies of Austria-Hungary and Germany and the Allied navies of France, Britain, Italy and Japan. The navy of the Ottoman Empire only sortied out of the Dardanelles once late in the war, preferring to focus its operations in the Black Sea.

The main fleet action was the Allied attempt to knock the Ottoman Empire out of the war by an attack on Constantinople in 1915. This attempt turned into the Battle of Gallipoli which was an Allied defeat.

For the rest of the war, naval action consisted almost entirely in submarine combat by the Austrians and Germans and blockade duty by the Allies.

[edit] Black Sea

The Black Sea was the domain of the Russians and the Ottoman Empire. The large Russian fleet was based in Sevastopol and it was led by two diligent commanders: Admiral Eberhardt (1914–1916) and Admiral Kolchak (1916–1917). The Ottoman fleet on the other hand was in a period of transition with many obsolete ships. It had been expecting to receive two powerful dreadnoughts fitting out in Britain, but the UK seized the completed Reshadiye and Sultan Osman I with the outbreak of war with Germany and incorporated them into the Royal Navy.

The war in the Black Sea started when the Ottoman Fleet bombarded several Russian cities in October 1914. The most advanced ships in the Ottoman fleet consisted of two ships of the German Mediterranean Fleet: the powerful battlecruiser SMS Goeben and the speedy light cruiser SMS Breslau, both under the command of the skilled German Admiral Wilhelm Souchon. Goeben was a modern design, and with its well-drilled, crack crew, could easily outfight or outrun any single Russian ship in their fleet. However it was often outgunned by the superior numbers of its slower opponent and would be forced to flee when the Russian battleship fleet was able to unite in pursuit. A continual series of cat and mouse operations ensued for the first two years with both sides' admirals trying to capitalize on their particular tactical strengths in a surprise ambush. Numerous battles between the fleets were fought in the initial years and Goeben and Russian units were damaged on several occasions.

The Russian Black Sea fleet was mainly used to support General Yudenich in his Caucasus Campaign. However, the appearance of the Goeben could dramatically change the situation, so all activities, even shore bombardment, had to be conducted by almost the entire Russian Black Sea Fleet, since a smaller force could fall victim to the Goeben's speed and guns.

However by 1916, this situation had swung in the Russians favour - the Goeben had been in constant service for the past two years. Due to a lack of facilities, the ship was not able to enter refit and began to suffer chronic engine breakdowns. Meanwhile, the Russian Navy had received the modern dreadnought Imperatritsa Mariya which although slower, would be able to stand up to and outfight Goeben. Although the two ships skirmished briefly, neither managed to capitalize on their tactical advantage and the battles ended with Goeben fleeing and Imperatritsa Mariya gamely trying to pursue. However, the Russian ship's arrival severely curtailed Goeben's activities and so by this time, the Russian fleet had nearly complete control of the sea, exacerbated by the addition of another dreadnought, Imperatritsa Ekaterina Velikaya. German and Turkish light forces would though continue to raid and harass Russian shipping until the war's end.

After Admiral Kolchak took command in August 1916, he planned to invigorate the Russian Black Seas Fleet with a series of aggressive actions. The Russian fleet mined the exit from the Bosporus, preventing nearly all Ottoman ships from entering the Black Sea. Later that year, the naval approaches to Varna, Bulgaria were also mined. The greatest loss suffered by the Russian Black Sea fleet was the destruction of the dreadnought Imperatritsa Mariya , which blew up in port on 7 October 1916, just one year after being commissioned. The subsequent investigation determined that the explosion was probably accidental, though sabotage could not be completely ruled out. The event shook Russian public opinion. The Russians continued work on two additional dreadnoughts under construction, and the balance of power remained in Russian hands until the collapse of Russian resistance in November 1917.

To support the Anglo-French attack on the Dardanelles, British and French submarines were sent into the Black Sea in the Spring of 1915. A number of Turkish supply ships and warships were sunk but several submarines were lost. The boats were withdrawn at the evacuation of the Dardanelles in January 1916.

[edit] Baltic Sea

v • d • e Baltic Sea 1914-1918

Swedish iron ore - Gotland - Gulf of Riga - Operation Albion - Moon Sound - Ice Cruise - British Campaign in the Baltic 1918-19

In the Baltic Sea, Germany and Russia were the main combatants, with a number of British submarines sailing through the Kattegat to assist the Russians. With the German fleet larger and more modern (many High Seas Fleet ships could easily be deployed to the Baltic when the North Sea was quiet), the Russians played a mainly defensive role, at most attacking convoys between Germany and Sweden.

A major coup for the Allied forces occurred on August 26, 1914 when as part of a reconnaissance squadron, the light cruiser SMS Magdeburg ran aground in heavy fog in the Gulf of Finland. The other German ships tried to refloat her, but decided to scuttle her instead when they became aware of an approaching Russian intercept force. Russian Navy divers scoured the wreck and successfully recovered the German naval codebook which was later passed on to their British Allies and provided immeasurably to Allied success in the North Sea.

With heavy defensive and offensive mining on both sides, fleets played a limited role in the Eastern Front. The Germans mounted major naval attacks on the Gulf of Riga, unsuccessfully in August 1915 and successfully in October 1917, when they occupied the islands in the Gulf and damaged Russian ships departing from the city of Riga, recently captured by Germany. This second operation culminated in the one major Baltic action, the battle of Moon Sound at which the Russian battleship Slava was sunk.

By March 1918, the Russian Revolution and the Treaty of Brest-Litovsk made the Baltic a German lake, and German fleets transferred troops to support the White side in the Finnish Civil War and to occupy much of Russia, halting only when defeated in the West.

[edit] Distant Oceans

v • d • e The Command of the Oceans, 1914-1915

Penang – Coronel – Cocos – Falkland Islands - Más a Tierra (Robinson Crusoe Island) - Rufiji Delta

A number of German ships stationed overseas at the start of the war engaged in raiding operations in poorly defended seas, such as the SMS Emden, which raided into the Indian Ocean, sinking or capturing thirty Allied merchant ships and warships, bombarding Madras and Penang, and destroying a radio relay on the Cocos Islands before being sunk there. Better known was the German East Asia Squadron, commanded by Admiral Graf Maximilian von Spee, who sailed across the Pacific, winning the Battle of Coronel before being defeated and destroyed at the Battle of the Falkland Islands.

Allied naval forces captured many of the isolated German colonies, with Samoa, Micronesia, Qingdao, German New Guinea, Togo, and Cameroon falling in the first year of the war. Despite the loss of the SMS Königsberg, the last German cruiser in the Indian Ocean, off the coast of German East Africa in July 1915, only that colony held out in a long guerrilla land campaign.