Underwater footage of HMS Coventry emerges
24 May 2012 Last updated at 22:07 BST
The 30th anniversary of the sinking of HMS Coventry during the Falklands conflict will be marked at a ceremony in the city on Friday.
The wreck is officially a war grave and the BBC has obtained previously unseen film of the destroyer in her final resting place.
Kevin Reide has this exclusive report.