After almost two years of continuous patrol for Nato and Canada, HMC/S Windsor has parked up for some maintenance.
The Royal Canadian Navy submarine was taken out of the water at HMC Dockyard in Halifax for routine work on its propulsion system.
Windsor is expected to return to the depths after a “short period”.
When it returns it will be undertaking various operations and multi-national training activities.
It’s expected to have logged around 400 days at sea in just the last two years.
Previously belonging to the Royal Navy, Windsor, which was named after the city of Windsor in Ontario, used to be called HMS Unicorn before being sold to the Canadians in 2001.
The long-range hunter-killer is over 230 ft long and has a range of 10,000 nautical miles at a speed of 12 knots.
It has six 23 mm torpedo tubes ready to fire 18 Mark 48 torpedoes.