Overview: Designed in the late 1960s, the Iroquois were designed as a unique solution for long-range anti-submarine warfare. Their primary weapon for this role was their complement of two CH-124 Sea King helicopters, which were supported on a large flight deck with a two-helicopter hangar that collectively took up roughly half of the ship's available area.
Details: As built, the Iroquois class ships were armed with a quick-firing OTO Melara 5"/54 forward, which provided good anti-surface/naval gunfire support capability, as well as close-ranged anti-aircraft defence. Point anti-aircraft defence was provided by NATO Sea Sparrow missiles, launched via a one-of-a-kind twin quad launcher situated just forward of the bridge. No other ships, in any navy, used this system. Anti-submarine capability was provided by two Mk.32 triple torpedo launchers, port and starboard, in addition to helicopter launched torpedoes. As well, a single Mk.NC 10 Limbo ASW mortar was provided in a well in the quarterdeck, aft of the helicopter deck.
Specifications:
Displacement: 4,700t
Length: 128.92m
Beam: 15.24m
Draught: 4.42m
Propulsion: 2 shafts; 2x Pratt & Whitney FT12AH3 cruise gas turbines, 7400 shp; 2x Pratt & Whitney FT4A2 boost gas turbines, 50,000 shp;
Complement: 285
Speed: 29kn
Range: 8,300km @ 12kn
Notes: No other ships, in any navy, used the classes missile launcher system. The missiles would be trained outboard of the launcher (in the deckhouse forward of the bridge) on launcher arms port and starboard, with four missiles to an arm. The arms would be brought back inboard for reloading. At the time, much was made of the fact that these ships tied together, in a viable package, an Italian gun, American missiles, with a Dutch radar and fire control system.
Sources
http://www.hazegray.org/navhist/canada/postwar/tribal/
https://www.seaforces.org/marint/Canadian-Navy/Destroyer/Iroquois-class.htm
https://en.wikipedia.org/wiki/Iroquois-class_destroyer

#1953 DDH 280 Iroquois, 1991 Gulf War Mod Athabaskan
Overview: HMCS Athabaskan was deployed on Operation Friction, the Canadian Forces contribution to the international coalition naval task force serving in Operation Desert Shield and Operation Desert Storm (the Gulf War). Athabaskan was the flagship of the Canadian Naval Task Group and served in the central Persian Gulf, with other coalition naval forces, through the fall of 1990.
Details: During the Gulf War of 1990/91, ATHABASKAN was sent to the Persian Gulf along with two other ships. She was quickly upgraded with a new mine-avoidance sonar, Phalanx 20mm CIWS (mounted over the inoperative Limbo mortar well) and shoulder launched Blowpipe and Javelin missiles.
Specifications:
Displacement: 4,700t
Length: 128.92m
Beam: 15.24m
Draught: 4.42m
Propulsion: 2 shafts; 2x Pratt & Whitney FT12AH3 cruise gas turbines, 7400 shp; 2x Pratt & Whitney FT4A2 boost gas turbines, 50,000 shp;
Complement: 285
Speed: 29kn
Range: 8,300km @ 12kn
Notes: When USS PRINCETON was disabled after hitting a mine in the northern Gulf, ATHABASKAN escorted a tug to her rescue and escorted both ships back out through the minefield.
Sources
http://www.hazegray.org/navhist/canada/postwar/tribal/
https://www.seaforces.org/marint/Canadian-Navy/Destroyer/Iroquois-class.htm
https://en.wikipedia.org/wiki/Iroquois-class_destroyer
https://en.wikipedia.org/wiki/HMCS_Athabaskan_(DDG_282)

#723 DDH Iroquois TRUMP, 1992, #725 DDH Iroquois TRUMP, 1999, #273 DDH Iroquois TRUMP, 2002, #467 DDH Iroquois TRUMP, 2005-14
Overview: These destroyers were all launched in the early 1970's, primarily as anti-submarine destroyers. The first Canadian warships (other than AORs) to carry multiple helicopters, they were also the first ships to be powered entirely by gas turbines in a COGOG (Combined Gas Or Gas) arrangement. Well suited to sea conditions in the North Atlantic, they made very effective anti-submarine platforms.
Details: During the late 80's and early 90's, they underwent major refits under TRUMP (Tribal Class Update and Modernization Program) and emerged as area air defence destroyers. TRUMP saw the "playboy bunny" funnels replaced with a single large funnel, the addition of new search and fire control radars, the replacement of the old 5" gun with a new 76mm one, the addition of a Mk.41 VLS, and other changes. Although hampered slightly by the lack of a 3D radar (cut as a cost saving measure), it is nevertheless reported that they can shoot down any aircraft within 50 nautical miles with their Standard SM-2 (MR) missiles. Though greatly improved, it should be noted that TRUMP was a stopgap measure only, and these ships are not in serious competition with purpose-built AAW ships such as the USN's Arleigh Burke (DDG 51) class. Sonar upgrades ensure continued ASW abilities.
Specifications:
Displacement: 5,100t
Length: 128.92m
Beam: 15.24m
Draught: 4.42m
Propulsion: 2 shafts; 2x 570 KF cruise gas turbines, 12,788 shp; 2x Pratt & Whitney FT4A2 boost gas turbines, 50,000 shp;
Complement: 285
Speed: 29kn
Range: 8,300km @ 12kn
Notes: During the refits the ships were also NBC-sealed. Algonquin completed in 1991, Iroquois in 1992, and Athabaskan in 1994. Although Huron was intended to serve until 2015, cutbacks in the navy’s budget forced her premature retirement.
Sources
http://www.hazegray.org/navhist/canada/postwar/tribal/
https://www.seaforces.org/marint/Canadian-Navy/Destroyer/Iroquois-class.htm
https://en.wikipedia.org/wiki/Iroquois-class_destroyer
