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Iroquois class

Guided-missile destroyer

Iroquois class destroyer

The Iroquois class is a major ASW platform for the Canadian navy

 
 
Entered service 1972
Crew 255 men
Sea endurance ?
Dimensions and displacement
Length 129.8 m
Beam 15.2 m
Draught 4.7 m
Displacement, standard ?
Displacement, full load 5 300 tons
Propulsion and speed
Speed 27 knots
Range 8 370 km at 15 knots
Propulsion COGOG with 2 x Pratt & Whitney FT4A2 gas turbines delivering 50 000 shp and 2 x Allison 570-KF gas turbines delivering 12 700 shp, both to two shafts
Aircraft
Helicopters 2 x CH-124A Sea King
Armament
Artillery 76-mm Super Rapid DP gun, 1 x 20-mm Mk.15 Phalanx CIWS
Missiles 1 x Mk.41 vertical launch system for 29 Standard SM-2MR Block III SAMs,
Torpedoes 2 x tripple Mk.32 324-mm tubes for 12 Mk.46 anti-submarine torpedoes

 

   Ordered in 1968 as anti-submarine destroyers, the four vessels of the Iroquois class comprise Iroquois, Huron, Athabaskan and Algonquin and are a revised version of the eight Tartar SAM-equipped Tribal class of general-purpose frigates cancelled in 1963. They retain the same hull design, dimensions and basic characteristics of the Tribals but have enhanced ASW features such as three sonars, a helicopter flight deck and hangarage for two licence-built CH-124A Sea King ASW helicopters: these can also carry 12.7-mm machine-guns and ESM/FLIR equipment in place of ASW gear. The weapons and sensor fit was a mixed bag with an Italian 127-mm OTO Melara Compact gun, two four-rail launchers for the US Sea Sparrow SAM system that retracted into a deckhouse in the forward superstructure, Dutch and US electronics and a British ASW mortar. The last was the ubiquitous triple-barreled Mk 10 Limbo weapon.

   For a new class of proposed helicopter-carrying destroyers, the Huron tested a vertical-launch Sparrow system in 1982, but the class did not materialize, and in the TRUMP (TRibal class Update and Modernization Project) in 1986 the ships were revised with a Mk 41 vertical-launch system (with 29 Standard SM-2MR medium/long-range SAMs in place of the Limbo installation). The electronics were also improved with more modern, capable systems, the process yielding ships with much enhanced anti-aircraft and anti-submarine capabilities. The original main gun was replaced by a 76-mm Super Rapid weapon from the same manufacturer and is complemented by a single Mk 15 Phalanx installation.

   For the embarked helicopters the ships can carry the active acoustic-homing Mk 44 and active/passive acoustic-homing Mk 46 torpedoes. The landing decks are fitted with the Beartrap system. The Iroquois class are to remain in service until at least 2010.

 

 
Iroquois class destroyer

Iroquois class destroyer

Iroquois class destroyer

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