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Hi Adrian,

If I remember rightly from my time in the RAF, A is alpha time i.e..
BST. This used to cause so many problems, all sortie planning was
usually done to Zulu time, but the working day was in Alpha time(BST),
things could be very confusing.

Hope this helps.

Paul.

Adrian James wrote:

> 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
> BST?
>
> I have since found a War Office manual dated mid 1950's which says that all
> sortie times should be given in GMT (Zulu).
>
> Thanks again
>
> Adrian
>
>
>>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
>>
> the
>
>>Summer. It is of no significance to photos taken in European airspace
>>
> where
>
>>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
>>
> their
>
>>own letter in the phonetic alphabet to demark it. Zulu (oddly not Alpha)
>>
> is
>
>>the line of longitutude through Greenwich.)
>>
>>
>