She was powered by four-cylinder triple-expansion steam engines, driving two shafts, which developed a total of 23,650 indicated horsepower (17,640 kW) and gave a maximum speed of 23.3 knots (43.2 km/h; 26.8 mph).

[3] Because of the extra topweight of the turrets in comparison to their half-sisters their stability was reduced which made them very good seaboats and steady gun platforms.

She was involved in the pursuit of the German battlecruiser Goeben and light cruiser Breslau at the outbreak of World War I, but was ordered not to engage them.

[5] Warrior participated in the Allied sweep which led to the sinking of the Austro-Hungarian light cruiser SMS Zenta during the Battle of Antivari in August 1914.

[8] Warrior joined the Grand Fleet in December 1914 and was assigned to the 1st Cruiser Squadron under Rear-Admiral Sir Robert Keith Arbuthnot.

At 5:47 p.m.,[Note 1] the squadron flagship, HMS Defence, and Warrior spotted the German II Scouting Group and opened fire.

[5] On 8 September 2016 Dr Innes McCartney of Bournemouth University announced that he and a team from the Sea War Museum Jutland had discovered the wreck of the Warrior.

[16] The ship lies completely upside down, at a depth of 80 meters in an area of soft sea bed, up to the level of the upper deck.