Photo copyright Joe Ryan.
Divers inside the hold of the Tabarka on the Shot Line, Scapa Flow, UK
The Tabarka was scuttled during the war to protect the harbour of Scapa Flow. She is upside down with numerous entry points. In 18 m this wreck is a 2000t steamer built 1909. Boilers and reciprocating gear intact, covered inside with marine life, anemones, lobsters, starfish, urchins and wrasse.

Further Reading
Dive Scapa Flow by Lawson Wood. Read our review...
The Underwater Photographer: Digital and Traditional Techniques by Martin Edge, Paperback, 536 pages (2009)