Whiskery
Thats the one and yup it was THAT close.
I remember breakng into a cold sweat just thinking about the consequences.
Mind you and as a matter of interest the old Van X and its ancestor the steam driven Van 5, in fact all DME was an Oz invention, yup good 'ol AWA God Bless em, and there was a limit on the number of aircraft that could interrogate the same DME due to the gate width, can't remember the number offhand (wasn't very high) but it was rapidly saturating at the time.
How far we have come so quickly.