walter kennedy
I think I am correct in saying your first attempt to link IFF/SSR, and the code of 7760, to the interrogation of a ground beacon for the purpose of providing a DME range, was stated in August of this year, on page 77 of this thread.
Presumably having become bored with your preoccupation with tacan frequencies.
Linking IFF/SSR with provision of DME range in ZD576 is utter garbage!
Sorry
PS. I don't need my 'mates' to tell me what towel rails are for.