Be real Frank, if they wanted to they could have back then too.
You couldn't cancel SAR below 5000ft at Monto in 1995 and you had to ring, (if the phone worked), if your HF went tits up, which it did when you tore the plastic cup off on the fence at Goodooga in 1976.
I flew Pt Augusta to Coolangatta in a no radio Auster in 1989 and did the SAR thing all by telephone. Remember you only had full reporting above 5000ft.
No, they only knew where I was according to where I reckoned I was.
No holy grail or veil of security, but I must be doing something right if I'm still here to annoy you blokes with your new fangled gadgetry.
By the way, an aeroplane flew over my place the other day. Thats two in the one month. Things are really getting busy.