page_title: HMS Ajax (1912)
section_title: Armament and armour
hierarchical_section_title: HMS Ajax (1912) / Design and description / Armament and armour
caption_attribution_description: The forward main gun turrets of the British battleship HMS Ajax, each mounting two 13.5-inch (343 mm) Mark V naval guns.
context_page_description: HMS Ajax was the third of four King George V-class dreadnought battleships built for the Royal Navy in the early 1910s. After commissioning in 1913, she spent the bulk of her career assigned to the Home and Grand Fleets. Aside from participating in the failed attempt to intercept the German ships that had bombarded Scarborough, Hartlepool and Whitby in late 1914, the Battle of Jutland in May 1916 and the inconclusive Action of 19 August, her service during World War I generally consisted of routine patrols and training in the North Sea.
  After the war, Ajax was assigned to the Mediterranean Fleet, where she took part in the Allied intervention in the Russian Civil War in the Black Sea in 1919–1920. The ship was deployed to Turkish waters during the Chanak Crisis of September–October 1922. Ajax was placed in reserve in 1924 before being sold for scrap two years later in accordance with the terms of the Washington Naval Treaty.
context_section_description: Like the Orion class, the King George Vs were equipped with 10 breech-loading (BL) 13.5-inch (343 mm) Mark V guns in five hydraulically powered twin-gun turrets, all on the centreline. The turrets were designated 'A', 'B', 'Q', 'X' and 'Y', from front to rear. Their secondary armament consisted of 16 BL 4-inch (102 mm) Mark VII guns. Eight of these were mounted in the forward superstructure, four in the aft superstructure, and four in casemates in the side of the hull abreast of the forward main gun turrets, all in single mounts. Four 3-pounder (1.9 in (47 mm)) saluting guns were also carried. The ships were equipped with three 21-inch (533 mm) submerged torpedo tubes, one on each broadside and another in the stern, for which 14 torpedoes were provided.
  The King George V-class ships were protected by a waterline 12-inch (305 mm) armoured belt that extended between the end barbettes. Their decks ranged in thickness between 1 inch (25 mm) and 4 inches with the thickest portions protecting the steering gear in the stern. The main battery turret faces were 11 inches (279 mm) thick, and the turrets were supported by 10-inch-thick (254 mm) barbettes.
caption: Ajax's forward main-gun turrets in 1918
exif: {"Image Make": "HP", "Image Model": "HP ojj6400", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "GIMP 2.10.6", "Image DateTime": "2018:12:08 01:57:28", "Image YCbCrPositioning": "Co-sited", "Image ReferenceBlackWhite": "[0, 255, 128, 255, 128, 255]", "Image ExifOffset": "242", "Thumbnail ImageWidth": "256", "Thumbnail ImageLength": "153", "Thumbnail BitsPerSample": "[8, 8, 8]", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail PhotometricInterpretation": "6", "Thumbnail SamplesPerPixel": "3", "Thumbnail JPEGInterchangeFormat": "1032", "Thumbnail JPEGInterchangeFormatLength": "7789", "EXIF ExifVersion": "0220", "EXIF DateTimeOriginal": "2010:07:10 14:41: 1", "EXIF ComponentsConfiguration": "YCbCr", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "1356", "EXIF ExifImageLength": "812", "EXIF Saturation": "Soft", "EXIF Sharpness": "Soft", "EXIF DeviceSettingDescription": "[1, 0, 19, 0, 32, 32, 32, 48, 65, 48, 32, 32, 32, 55, 65, 48, 32, 32, 32, 56, ... ]"}