This aerial photograph shows some of the changes made to the destroyer escort HMCS Gatineau in the late 1960s and early 1970s.

Several Canadian warships were rebuilt in this period to increase their anti-submarine capabilities. During its rebuild, Gatineau lost one of its gun mountings and one of its Limbo anti-submarine mortars. In return, it received an anti-submarine rocket called ASROC (the rectangular box with round black dots at upper centre left) and a stern-mounted variable depth sonar (upper left). Other upgrades included improved anti-submarine homing torpedoes and newer electronic equipment.

George Metcalf Archival Collection
CWM 19780019-015