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21st May 2020, 08:15

#7 (permalink)

chevvron

Join Date: Nov 2005

Location: Wildest Surrey

Age: 75

Posts: 10,820

Received 98 Likes on 71 Posts

Quote:

Originally Posted by DFS346

Does anyone know or remember when 7500 became, or was designated, the standard transponder code for a hijacking?

As far as I recall, all 3 main special purpose codes (7500, 7600 and 7700) were introduced at the same time.

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