HMS Indomitable was an Invincible-class battlecruiser of the Royal Navy. She was one of the first of her type of ship, a battlecruiser, and like the Dreadnought, the class effectively turned every other large cruiser obsolete.
The ship had been designed concurrently with the Dreadnought, and so when all four ships commissioned, a ripple of pride swelled the Fleets of His Majesty King George V, not to mention the people of the United Kingdom at that time. It seemed Britannia really did rule the waves.
The production of these battlecruisers was ultra-secret; indeed the secrecy led to the Germans countering the Invincible class with merely an armoured cruiser, what they believed would be an almost equal type of ships to counter the Invincibles. What could potentially have been a potent ship, the SMS Blücher, lacked dangerously in firepower, a decision that would later result in its sinking in 1915 at the Battle of Dogger Bank (1915) with the lost of over 700 men. Though just like Blücher, the Invincibles themselves had their own deficiencies that would prove equally tragic for Invincible.
Their larger size and smaller displacement compared to Dreadnought as well as their distinct lack of armour made her vulnerable to engaging a number of larger, even smaller warships, and the likelihood was that the class would face the German Fleet in battle one day, and so come up against Germany's most powerful warships.
Her builders were Fairfield Shipbuilding & Engineering Co. Ltd, at Govan, and she was laid down in 1906, being launched relatively quickly the following year. She was commissioned in 1908 along with HMS Inflexible, though the nameship, HMS Invincible was not commissioned until 1909. In 1909, Indomitable embarked His Majesty King George V on a record trip to Canada and back. In 1910, at the Review of the Combined British Fleets off Spithead, the world had their first look at these truly imposing ships.
At the outbreak of the First World War in August 1914, Indomitable, part of the British Mediterranean Fleet, was involved in the pursuit of Goeben and Breslau. Indomitable's first engagement came in November 1914. She, along with the newer battlecruiser HMS Indefatigable and the obsolete French battleships Suffren and Vérité bombarded the Turkish forts of Sedd-al-Bahr and Kum Kale. The attack was successful, but only just. The success increased the confidence of the Admiralty of the ability of warships to attack and defeat shore batteries, though this confidence would prove not to be foresighted, for in 1915 shore batteries wreaked havoc among a number of battleships and battlecruisers during the Dardanelles Campaign in 1915.
At the Battle of Jutland, Indomitable, under the command of Captain F.W. Kennedy was part of the 3rd Battlecruiser Squadron, which comprised the two other ships of her class. Her gunnery officer was Cdr. Lachlan Donald Ian Mackinnon.
Indomitable was placed into Reserve in 1919 and subsequently paid off in 1920 and scrapped in 1922 due to the Washington Treaty. The other remaining ship of the class, Inflexible, was also paid off in 1920 and scrapped in 1922.