The Northern Diving Group change the White Ensign on the wreck of the Royal Oak every year.
Prince William spoke movingly about his late grandfather during a visit to BAE Systems in Glasgow.
Royal Navy aircraft carrier arrives at Loch Long as part of final preparations before first operational deployment.
Justice Secretary says Royal Navy will not be deployed in Scotland as MOD confirms armed vessels are on standby.
The Royal Navy vessel was welcomed back to HM Naval Base Clyde on Friday by a small flotilla of boats.
Police joined forces with the Navy after the body of a young woman was found near a dockyard.