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HMCS Nipigon underway during NATO Exercise Ocean Safari '85.
|Builders:||Halifax Shipyards Ltd., Halifax
Marine Industries Ltd., Sorel
|Preceded by:||Mackenzie-class destroyer|
|Succeeded by:||Iroquois-class destroyer|
|Displacement:||3,420 long tons (3,474.9 t) full load|
|Length:||366 ft (112 m)|
|Beam:||42 ft (13 m)|
|Draught:||23.5 ft (7.2 m)|
|Propulsion:||2-shaft English-Electric geared steam turbines
2 Babcock and Wilcox boilers
30,000 shp (22,000 kW)
|Speed:||28 kn (51.9 km/h)|
|Aircraft carried:||1 CH-124 Sea King ASW helicopter|
|Aviation facilities:||Midships helicopter deck and hangar with Beartrap.|
The Royal Canadian Navy had intended to place a six ship order under the Mackenzie-class of destroyer escorts; however, the last two vessels were built to the St. Laurent-class DDH design and were classed under the new Annapolis-class designation. Both ships spent the majority of their career split between Canada's Pacific and Atlantic coasts with the Annapolis being at Esquimalt and Nipigon at Halifax.
The two Annapolis-class destroyers were built late enough to incorporate the helicopter hangar retrofitted to the St. Laurent-class. Nipigon underwent a DELEX (DEstroyer Life EXtension) refit in 1982 to upgrade combat, radar and weapons systems and Annapolis followed in 1984. Nipigon remained in the fleet until 1998 as a trials ship for the ETASS Mod 5 towed sonar system which was a precursor to the CANTASS (Canadian Towed Array Sonar System) that is currently fitted on the Halifax-class of frigates. Except for the replenishment ships HMCS Protecteur and HMCS Preserver, Nipigon was the last steam-powered warship to serve in the Canadian Forces.
These ships were among the first to take a new approach to helicopter operations from small warships. Unlike the British, who fitted a small helicopter (Westland Wasp) on their frigates with only a minimum of redesign, the Royal Canadian Navy decided to use the far more capable and sophisticated CH-124 Sea King. The disadvantage of this approach is the fact that a considerable amount of surface area on the mothership has to be sacrificed to accommodate the helicopter. On the other hand, the helicopter itself is far more capable and can operate even in poor weather conditions: a considerable advantage in the polar region.
|Ship||Pennant Number||Builder||Laid Down||Launched||Commissioned||DELEX Refit||Paid Off||Fate|
|HMCS Annapolis||265||Halifax Shipyards Ltd., Halifax||2 September 1961||27 April 1963||19 December 1964||15 September 1986||15 November 1996||Scuttled off Gambier Island in 2015.|
|HMCS Nipigon||266||Marine Industries Ltd., Sorel||5 August 1960||10 December 1961||30 May 1964||22 August 1984||7 July 1998||Scuttled off Rimouski, QC in 2003.|