Annapolis-class destroyer

The Annapolis-class destroyer escort was a two-ship class of destroyer escorts that saw service with the Royal Canadian Navy and Canadian Forces from the 1960s to the 1990s. The final version of the St. Laurent-class design, the class was used extensively for anti-submarine warfare purposes. Both ships were sunk as artificial reefs after being retired, one on each coast of Canada.

HMCS Nipigon underway during NATO Exercise Ocean Safari '85.
Class overview
NameAnnapolis class
Builders
Operators
Preceded byMackenzie class
Succeeded byIroquois class
Built1960–1964
In commission1964–1998
Planned2
Completed2
Retired2
General characteristics
TypeDestroyer escort
Displacement3,420 long tons (3,474.9 t) full load
Length366 ft (112 m)
Beam42 ft (13 m)
Draught23.5 ft (7.2 m)
Propulsion
Speed28 kn (51.9 km/h; 32.2 mph)
Complement228
Sensors and
processing systems
  • Original:
    • 1 × SPS-12 air search radar
    • 1 × SPS-10B surface search radar
    • 1 × Sperry Mk.2 navigation radar
    • 1 × URN 20 TACAN radar
    • 1 × SQS-501 high frequency bottom profiler sonar
    • 1 × SQS-502 high frequency mortar control sonar
    • 1 × SQS-503 hull mounted active search sonar
    • 1 × SQS-504 VDS medium frequency active search sonar
    • 1 × UQC-1B "Gertrude" underwater telephone
    • 1 × Mk 60 GFCS fire control with SPG-48 tracker (GUNAR)
  • DELEX:
    • 1 × Marconi SPS-503 air search radar
    • 1 × Raytheon/Sylvania SPS-502 surface search radar
    • 1 × Sperry Mk.127E navigation radar
    • 1 × URN 25 TACAN radar
    • 1 × SQS-505(V) or SQS-510 hull mounted active search sonar
    • 1 × SQS-504 VDS medium frequency active search sonar
    • 1 × SQR-19(V) CANTASS towed array sonar
    • 1 × UQC-1B "Gertrude" underwater telephone
    • 1 × Mk 60 GFCS fire control with SPG-48 tracker (GUNAR)
Electronic warfare
& decoys
  • Original:
    • 1 × ULQ-6 jammer
    • 1 × WLR-1C radar analyzer
    • 1 × UPD-501 radar detector
    • 1 × SRD-501 HF/DF
  • DELEX:
    • 1 × SLQ-501 intercept (CANEWS)
    • 1 × ULQ-6 jammer
    • 1 × SRD-501 HF/DF
Armament
  • Original:
    • 1 × FMC 3-inch/50 Mk.33 twin gun
    • 1 × Mk. NC 10 Limbo ASW mortar
    • 1 × Mk.4 thrower with homing torpedoes
  • DELEX:
    • 1 × FMC 3-inch/50 Mk.33 twin gun
    • 2 × triple Mk.32 12.75-inch torpedo tubes firing Mk.44 or Mk.46 Mod 5 torpedoes
Aircraft carried1 CH-124 Sea King ASW helicopter
Aviation facilitiesMidships helicopter deck and hangar with Beartrap.
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