In common with her sister ships, she was armed with new 12-inch, 46-ton guns which offered greater accuracy and penetration than the 13½-inch guns used on the previous Royal Sovereign class ships. 113 miles of wire were wrapped around the gun barrel and each gun took nine months to manufacture. She carried four such guns in two barbettes with up to 400 rounds for each. She also sported a 6-inch secondary array, and four submerged torpedo tubes in the bow with one above water in the stern. She was armoured with 9-inch Harvey steel and divided into 150 watertight compartments.

During World War I her guns were removed to equip the new monitors which were to be used on the Belgian coast, a fate which also befell her sister ships HMS Magnificent and HMS Hannibal. The three ships were then used as transports in the successful evacuation of Gallipoli on 19 December 1915.

On her return from the Dardanelles, the Mars became the base ship at Invergordon

HMS King Edward VII, named after King Edward VII, was the lead ship of the King Edward VII class of British Royal Navy battleships.

The ship was built at Devonport Dockyard and launched 23 July 1903.

King Edward VII hit a mine whilst travelling from Rosyth to Devonport around the Northern coast of Scotland for a refit. The mine had been laid by the German auxiliary cruiser SMS Moewe off Cape Wrath on 6 January 1916. The explosion occurred under the starboard engine room and attempts to tow her were abandoned because of a heavy sea and strong winds. After about five hours, the list had become so great that the crew were taken off by destroyers. The ship capsized and sank around nine hours after the explosion. At the time it was not clear whether she had hit a mine or a torpedo, the presence of the minefield being determined from German records after the war. The wreck, in 115 metres of water, was first visited by divers in April 1997

 

HMS Majestic was a Majestic-class pre-Dreadnought battleship of the Royal Navy, built at Portsmouth Dockyard and commissioned into the Channel Squadron in December 1895. In 1906 Majestic joined the Atlantic Fleet briefly before being relegated to reserve. In 1912 Majestic joined the Home Fleet. She collided with her sister ship Victorious in July of that year.

At the outbreak of World War I, Majestic served with the Battle Squadron and performed convoy escort and coastal bombardment duties. In 1915, under the command of Captain H. F. G. Talbot, Majestic joined the Mediterranean Fleet and participated in the Dardanelles Campaign including the final attempt to force the straits by naval power alone on March 18, 1915.

On May 27, while stationed off W Beach at Cape Helles, Majestic became the third battleship to be torpedoed off the Gallipoli peninsula in two weeks. Around 06:45 Commander Otto Hersing of the U-21 fired a single torpedo through the defensive screen of destroyers and anti-torpedo nets, striking Majestic and causing a huge explosion. The ship began to list to port and in nine minutes had capsized in 16 metres of water, killing 49 men. The upturned hull remained visible for many months until it was finally submerged during a storm on the night of November 17.
 

HMS Prince of Wales (1902) was a London class battleship, a sub-class of the Formidable-class battleships of the British Royal Navy. HMS Prince of Wales (1902) was the sixth of seven ships of the Royal Navy that have had the name HMS Prince of Wales.

Prince of Wales was the last British battleship to be built with water tube Belleville boilers, which had service problems. Her near identical sister ship HMS Queen was fitted with Babcock and Wilcox cylindrical boilers.

The ship was launched on 25 March 1902 from Chatham Dockyard.

In World War I, HMS Prince of Wales was one of the four battleships transporting the 3rd Brigade, Australian Army, during the 1915 landing at Anzac Cove. During this time her Commander (second-in-command) was Kenneth Dewar, later a controversial figure in the navy.

HMS Prince of Wales was sold for break-up and scrap on 21 September 1921.