Originally Posted by
Uplinker
No, I was talking about the actual technicallities of engineering what we used to call "talk through", which is actually fairly simple to achieve and would consist of a box of electronics costing a few hundreds. (I could make one for you if you want). You did not mention the FAA until just now.
I agree with your first point though; about waiting for a few seconds before transmitting on a new frequency. I have watched guys on the other side of the cockpit tread all over other people's transmissions and then get themselves in a right mess of "station calling?" "two stations" "say again" etc., and having to repeat themselves several times because they did not wait just a couple of seconds to check whether anybody was in the middle of a conversation.
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Already been done, but nobody cares to implement it. We had a non-step-on system that would allow only the first received aircraft to continue transmitting the second aircraft would receive the first's transmission and not be able to hear their own. Controller could transmit over any aircraft transmission(s) so even 'stuck transmit' would not prevent controller transmitting to that aircraft. Aircraft could be transferred to the next controller and that would also transfer the aircraft RT with no change of frequency required.
Lots of things are possible with voice over data link, but there is no point implementing as voice comms are going to be considerably reduced in future. In many sectors RT workload is the limiting factor on traffic so expect to see changes in the next decades.