I-class destroyer

HMS Imogen
Class overview
Name	I class
Operators	Royal Navy  Turkish Navy
Preceded by	G and H class
Succeeded by	Tribal class
In commission	1937–1960
Completed	13
Lost	6
Scrapped	7
General characteristics (as built)
Type	Destroyer
Displacement	1,370 long tons (1,390 t) (standard) 1,888 long tons (1,918 t) (deep load)
Length	323 ft (98.5 m)
Beam	33 ft (10.1 m)
Draught	12 ft 5 in (3.8 m)
Installed power	34,000 shp (25,000 kW) 3 Admiralty 3-drum boilers
Propulsion	2 shafts; 2 geared steam turbines
Speed	36 knots (67 km/h; 41 mph)
Range	5,530 nmi (10,240 km; 6,360 mi) at 15 knots (28 km/h; 17 mph)
Complement	137 (peacetime), 145 (wartime)
Sensors and processing systems	ASDIC
Armament	4 × 1 - QF 4.7-inch (120 mm) Mk IX guns 2 × 4 - 0.5-inch (12.7 mm) machine guns 2 × 5 - 21-inch (533 mm) torpedo tubes 20 × Depth charges, 1 rack and 2 throwers 60 mines (minelayers only)

The I-class destroyers were a group of nine destroyers, including a flotilla leader, built for the Royal Navy during the 1930s. Four similar ships were ordered by the Turkish Navy, of which two were purchased for the Royal Navy, bringing the number of these ships in British service to 11—although three of the original ships had been lost by the time Inconstant and Ithuriel were commissioned. The I-class served in World War II and six were lost, with a seventh ship being written off.