One of the Royal Navy's longest-serving submarines sailed into British naval history after 33 years of service.
HMS Sovereign on her final voyage after 33 years service
HMS Sovereign flew her decommissioning pennant as she sailed from her base near Helensburgh for the last time.
The First Sea Lord, Admiral Sir Jonathon Band, was at HM Naval Base Clyde to bid a personal farewell to HMS Sovereign, a hunter killer submarine.
Sir Jonathon was on a three-day visit to assess the navy's multi-million pound investment in Scotland.
He said: "I have been to Glasgow to see the Daring work, I have been to Rosyth to see the carrier and frigate upgrading - I couldn't miss HM Naval Base Clyde for Sovereign's last sailing - and what a change we have here.
"Scotland and the Royal Navy have imperishable links and plans are in place to maintain those links long into the future."
The First Sea Lord was joined on the jetty by HM Naval Base commander, Commodore Carolyn Strait.
She said: "We were all delighted that the First Sea Lord could attend the departure of HMS Sovereign. It also gave us a chance to show him the major improvements around the base."