If the GPS goes down, then it goes back to a procedural standard. Is it better to stick with a procedural standard just in case or use what's available now and have contingency plans. If it's the former we should probably get rid of that pesky radar thing in case it fails as well. Then we can rely on pilot reports. Oh wait, as a procedural tower controller, I often see how far out a departure time is (even after a time check is given on taxi) or a pilot tell me they are established on a radial when I can very clearly see they aren't anywhere near it
From a controller perspective I think we should make the most of it. Definitely makes our sequences into Karratha a lot easier (even though we in the tower don't have a feed).
However, in my opinion, there should be some scope for non ADSB aircraft to still use the airspace, workload permitting. However I am a long way down the food chain
