UNDER a veil of heavy security, the nuclear submarine USS Scranton departed Portsmouth Naval Base at the end of its 10-day visit to the city.
It slipped out of the harbour with a police escort, ensuring that ferries, yachts and civilian boats remained outside of the 250-metre security cordon.
The submarine, which can carry tomahawk and harpoon missiles, stopped off in Portsmouth as part of its six-month deployment allowing the crew the opportunity to visit the city.
While in the dockyard, it was berthed at a special jetty specifically designed to accommodate nuclear submarines, near the berth of soon-to-be decommissioned HMS Ark Royal.
Visits by nuclear submarines to the naval base are particularly rare, with only one or two visits per year.