Gorgon-class monitor

HMS Gorgon
Class overview
Name	Gorgon class
Builders	Armstrong Whitworth, Elswick
Operators	Royal Navy
Preceded by	Marshal Ney class
Succeeded by	M15 class
Cost	About £640,000
Built	1913–1918
In service	1918–1919
In commission	1918–1919
Completed	2
Lost	1
Scrapped	1
General characteristics
Type	Monitor
Displacement	5,746 long tons (5,838 t) at deep load
Length	310 ft (94 m)
Beam	73 ft 7 in (22.43 m) at bulge 55 ft (17 m) at main hull
Draught	16 ft 4 in (4.98 m)
Installed power	4 Yarrow boilers 4,000 ihp (3,000 kW)
Propulsion	2 shafts; Vertical triple-expansion steam engines
Speed	12 knots (22 km/h; 14 mph)
Endurance	2,700 nmi (5,000 km; 3,110 mi) at 11 knots (20 km/h; 13 mph)
Complement	305
Armament	2 × 1 – 9.2-inch (234 mm) Mk XII guns 4 × 1 – BL 6 inch Mk XVIII guns 2 × 1 – QF 3 inch 20 cwt gun anti-aircraft guns 4 × 3-pounder 4 × 2-pounder AA guns
Armour	Belt: 3–7 in (76–178 mm) Bulkheads: 3–5 in (76–127 mm) Turret faces and barbettes: 8 in (203 mm) Turret sides 6 in (152 mm) Conning tower: 8 in (203 mm) Decks: 1–3.5 in (25–89 mm)

The Gorgon-class monitors were a class of monitors in service with the Royal Navy during World War I. Gorgon and her sister ship Glatton were originally built as coastal defence ships for the Royal Norwegian Navy, as HNoMS Nidaros and HNoMS Bjørgvin respectively but requisitioned for British use. Gorgon commissioned first, in June 1918 and bombarded German positions and other targets in Occupied Flanders. She fired the last shots of the war by the Royal Navy into Belgium on 15 October 1918. She was offered for sale after the war, but was used as a target ship when there were no takers. She was sold for scrap in 1928. Glatton was destroyed by a magazine explosion only days after she was completed in September 1918 while in Dover Harbour. She remained a hazard to shipping until the wreck was partially salvaged and the remains moved out of the way during 1925–26.