The Royal Canadian Air Force CH-148 Cyclone helicopter from 12 Wing Shearwater, known as Stalker-22, was participating in Allied training exercises with HMCS Fredericton off the west coast of Greece on April 29. It had concluded flight operations and was returning to HMCS Fredericton when, approximately 7 p.m. local time, the chopper crashed at a high speed into the water in view of witnesses at the stern of the ship.