Thanks to Diana, and all other Britarchers, for the information about this
topic. Interestingly one of the Aerial Photograph sortie plots gives the
time as 0910A. As the sortie was flown in July 1946, does this correspond to
I have since found a War Office manual dated mid 1950's which says that all
sortie times should be given in GMT (Zulu).
> As a previous correspondant suggests, Zulu time is GMT or as as it is now
> known, UTC - Universal Coordinated Time.
> GMT/UTC matches European time during the Winter and is an hour behind in
> Summer. It is of no significance to photos taken in European airspace
> time differences are of the order of less than four hours or so (except
> Eastern Soviet territory) but might be more important when it comes to
> evaluating overseas photos.
> (As a background the world is divided into 24 (?) timezones, each with
> own letter in the phonetic alphabet to demark it. Zulu (oddly not Alpha)
> the line of longitutude through Greenwich.)