Near miss with 5 airliners waiting for T/O on taxiway "C" in SFO!

[Sailvi767]

Originally Posted by Ian W

You are talking in terms of the obsolescent ILS where there are concerns over multipath effects with aircraft ahead and even on the ground close to the runway. GLS, GBAS and the capabilities such as Established on RNP have no such issues. The retention of ILS is a huge hidden cost for airports. Runway acceptance rate is reduced in IFR operations and the cost of calibration of a single runway ILS exceed the cost of ownership of a GBAS that will provide GLS to every runway end at the airport. ANSPs should issue an NPRM to withdraw ILS by say 2025

There is far more to eliminating ILS approaches than you post. I suspect it will continue to be widely used for the next 20 years. I am not aware of any current airliner certified for a auto land off any approach other than a ILS. Even if the new technology can be retrofitted into existing aircraft there are very serious security considerations that need to be overcome. They are a long way from that.