Jane Maddocks, from Gosport, was joined by seven other divers as they volunteered in remembrance of the 1,459 Royal Navy sailors who lost their lives 101 years ago.
The mission was entitled the 'Live Bait Expedition', the same controversial name given to the WW1 squadron.
Their task was to survey the wrecks of HMS Cressy, HMS Hogue and HMS Aboukir which were all sunk by a German U-boat in the early hours of September 22, 1914.
The honour of laying the wreath on HMS Cressy fell to Carol Wood, whose god-daughter’s great-great-grandfather, William Henry King perished in the attack. She says: