RFA Darkdale
On a chilly dark night in the 1940s, a German submarine sank this gasoline tanker when a torpedo pierced the bow part of the ship RFA Darkdale. The Darkdale has attracted a diverse range of marine species, including Bullseye, Grouper, Cavalley, and various St Helena endemics including Greenfish, Cunningfish, and Rockfish.
Another highlight is the descent and climb, when tuna and barracuda, as well as the peaceful gigantic whale shark, are frequently sighted. Apart from the blast damage, the ship's surviving pieces are essentially undamaged, albeit the ship rolled as she sunk and the debris is now overturned on the bottom.
The oil (which had begun to seep from the tanks) and explosives were removed from the ship RFA Darkdale in 2007, but the wreck remains undamaged. There's no way to infiltrate the vessel since wreck penetration is now prohibited, and technical diving is limited due to a shortage of appropriate gas mixes, and the islanders want it to stay that way out of respect for the sailors who perished. This is considered one of Best Diving Sites in Saint Helena, Ascension and Tristan da Cunha (UK).