The Royal Navy's last Type 42 destroyer, HMS Edinburgh, will return to Portsmouth for the final time on Friday.
The 30-year-old warship has sailed almost 800,000 miles and will be decommissioned on June 6, as the Type 42s are replaced by new Type 45s.
The ship will fly a decommissioning flag on her final return and will be accompanied by HMS Diamond - one of the Navy's successor Type 45s.
A 21-gun salute will be fired from HMS Edinburgh as she approaches the harbour where Fort Blockhouse, Gosport, will respond with a saluting gun.
The ship returns to Portsmouth after a month-long farewell tour across the UK, which included visits to Liverpool where she was built, her namesake city and London where she helped mark the 70th anniversary of the Battle of the Atlantic.
HMS Diamond, which played a starring role in the nation's Diamond Jubilee celebrations will leave Portsmouth later on her maiden deployment to the Middle East. The Type 45 Destroyer will continue the Navy's fight against piracy and patrol the Indian Ocean and Gulf.
The Type 45 Destroyer HMS Diamond will fire a 21 gun salute as she enters Portsmouth's Naval Base later as the city celebrates the Queen's Diamond Jubilee. Navy helicopter will perform a special formation display above the city with crew members taking part in a special street party in the docks.
"It is fitting that Her Majesty's Ship Diamond should mark Her Majesty's Diamond Jubilee in this way. The Queen's affection for and commitment to the Armed Forces have touched the lives of many servicemen and women and their families over the past 60 years and I am proud that HMS Diamond is helping to launch this special weekend of celebrations across our island nation."
Royal Navy warship HMS Diamond will launch the nation’s weekend of jubilee celebrations by honouring the Queen during a spectacular entry in to Portsmouth Naval Base on June 1.
The Type 45 destroyer will fire a 21-gun salute and give three cheers to Her Majesty as the ship enters Portsmouth Harbour at 10.30am while four Navy helicopters perform a flypast over the ship in a diamond formation. The Navy saluting gun overlooking the harbour will fire 21 times in return.
HMS Diamond will be led into the harbour by two Royal Navy patrol vessels – HMS Raider and HMS Blazer. Once the ship is berthed in the Naval Base there will be street party celebrations for the 190 crew and guests on the ship’s flight deck.