It was believed for centuries that the loss of HMS Victory in 1744 was attributable to wrecking on the Casquets , the lightkeeper of Alderney even being court-martialled for failure to keep the light on at the time of the ship 's loss .
The largest wreck was the 8000 tonne water tanker Constantia S . It was believed for centuries that HMS Victory was wrecked in 1744 on the Casquets , the lightkeeper of Alderney even being court-martialled for failure to keep the light on at the time of the ship 's loss .