Historic Environment Scotland commissioned ORCA and SULA Diving to conduct side scan sonar and archaeological diving surveys in 2015 of two wrecked vessels located off Flotta Island, Orkney, N.Scotland.
The vessels were first brought to the attention of the authors by Hazel Weaver of the MV Valkyrie after they were dived by Rob Baxandall.
Archival research indicates these are the remains of Anti-Torpedo Close Protection Pontoons (ATCPP), an experimental protection device used for close protection of naval vessels at anchor in Scapa Flow from attack by aircraft-launch torpedoes. The pontoons were only in operation in Scapa Flow for 13 months (March 1941 – April 1942) and few were brought into service.
As such they represent a rare, frequently mis-identified heritage resource, for which very little is known about their operation. Had the site not been reported, a unique heritage asset would have been overlooked and the identity of similar vessels would have remained unconfirmed.
Many thanks to Hazel Weaver and Rob Baxandall for their help and co-operation.
Also don`t forget to visit the Secrest of the Sea exhibition in Orkney Museum in Kirkwall if you are in Orkney…..http://wp.me/p6YR8M-f1