The DRDC Icepick Geobuoy Air Drop

Defence Research and Development Canada’s scientific and engineering team tested geobuoys used to detect crafts below the ice at Canadian Forces Station Alert in High Arctic region of Alert, Nunavut. The geobuoys are cylinder-shaped and contain a vibration sensor and radio transmitter, as well as a parachute on its tail and an icepick for a nose. They are dropped from an aircraft to conduct under ice acoustic surveillance.