Elizabeth Try Google & search for >>. -- HMS Tern - it was a Royal Navy aerodrome at Twatt, on Mainland, Orkney, used by the RN Fleet Air Arm , first commissioned on 1st April 1941. -- RN Fleet Air Arm -- Scapa Flow - was the base for the RN Home Fleet in WW II and its norther shore is Mainland -- Churchill Barriers Related maps can be found at >> < http://www.multimap.com/ > Unit Text - broadly indicates assignment to a fighting unit - naval ship, air force squadron or army battalion Naval Shore Stations (on land) were traditionally accorded the title HMS xxxxxxxx or similar, depending on the (Commonwealth) country - hence HMS Tern - an aerodrome There was a ship called HMS Tern in the China Fleet concurrently; it was scuttled (after an air attack) in 19 Dec 1941 near Hong Kong Cheers, Barry, on the Sunshine Coast, Queensland [email protected] (Constant Virus Monitoring by NAV - 18/05/2005 update.) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~` elizabeth Abbott wrote: (snipped) ........... background information about Scapa Flow during World War II ............about the war action in Orkney ............anything about the H.M.S. Tern? ............the term "Unit Text"