Very many thanks for all the advice and assistance.
BOAC. IE7 and XPpro
I shall try to 'research' it further!
http://www.youtube.com/watch?v=Lcl2AZFqu2k
I am convinced that the 'poster' could not have taken the clip because the submarine was moved shortly after the clip was taken and it was obviously taken from one of the five British helicopters there.
HWB