Photo copyright Tim Nicholson.
Propellor of the Carnatic, Red Sea, Egypt.
The Carnatic was a sail and steam ship launched in 1862. In 1869 she struck and remained fixed on the Sha'ab Abu Nuhas Reef in the Straits of Gobal. For two days she remained there with all passengers and crew staying on board. Just as they were abandoning ship she broke in half. Thirty-one people died but the rest reached the lifeboats and Shadwan Island.
The Underwater Photographer: Digital and Traditional Techniques, by Martin Edge, Paperback, 536 pages (2009)
Shipwrecks from the Egyptian Red Sea by Ned Middleton; Immel Publishing, 160 pages.