On Nov. 5, 1983, an experienced tender named William Crammond was in the middle of a routine procedure aboard the Byford Dolphin, a semi-submersible oil rig operating in the North Sea. The rig was equipped with two pressurized living chambers, each holding two divers. Crammond had just conne...
Byford Dolphin was a semi-submersible offshore oil rig built by Aker Engineering of Oslo in 1974. Weighing 3000 tons and manned by a crew of 100, it was capable of drilling in waters up to 460 meters in depth. To allow construction and maintenance of the wellhead at these depths, the r...