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HMCS Assiniboine and Sea King Helicopter
HMCS Assiniboine and Sea King Helicopter

This photograph shows two major postwar Canadian naval technology developments: operating large helicopters from relatively small ships, and the variable depth sonar.

The square "bear trap" visible in the middle of the flight deck (centre) used a system of cables and winches to allow large helicopters like the Sea King seen here to land on relatively small warships like HMCS Assiniboine, even in rough seas. By allowing anti-submarine warfare operations to continue in virtually all types of weather, it conferred a critical military advantage. The mechanism at the ship's stern (centre right) supported, launched, and retrieved a variable depth sonar, which greatly increased the range at which submarines could be detected.

Naval Museum of Alberta



Storm Damage, SS Joel R. Poinsett
Rescuing Survivors
HMCS Longueuil Rescues Survivors
Ordinary Seaman Somer Oscar James
Chief Officer Percy Kelly
Officers aboard SS Stanley Park
SS Stanley Park
David McMillan
Officers, SS Stanley Park
"Crossing the Line", SS Stanley Park
Gun Crew at Practice, SS Stanley Park
Gun Crew, SS Stanley Park
Disposing of Ammunition, SS Stanley Park
Towing SS Noranda Park, September 1945
SS Stanley Park's Swimming Pool
Holiday Portrait, SS Stanley Park
On Stanley Park's Flying Bridge
Fireman, SS Stanley Park
HMCS Micmac
HMCS Magnificent and Destroyer
Canadian Ships in Halifax Harbour
HMCS Assiniboine and Sea King Helicopter
HMCS Porte St. Louis and HMCS Porte St. Jean
HMCS Ontario in the Panama Canal