Eleven years after the deaths of five sailors in the mysterious sinking of French trawler Bugaled Breizh off Cornwall, their families have launched a final appeal in court, reports the BBC.
Relatives believe the fishing boat was dragged underwater when a submarine became snagged in its nets.
But that theory was ruled out and the case was dismissed last year.
The advocate general called on the appeal court in Rennes to confirm that the case was closed.
The case was adjourned for further deliberation until May.
The Bugaled Breizh went down in broad daylight in relatively calm seas on 15 January 2004, off the Lizard in Cornwall, in south-west England.
In the years that followed, the families have sought to find out what led to the sinking.