Originally Posted by
krismiler
INS was self contained and whilst subject to drift, it couldn’t be interfered with.
Indeed but was very expensive and you could not re-initiate it in flight. Now a few modern aircraft are equipped with cheaper IRS , but in their wisdom the manufacturers decided to use GPS to augment its accuracy during flight !
mitigation is disabling GPS to get some form of NAV in case of GPS jamming or spoofing..
But the main issue in lost of Time , as most modern a/c use GPS clock to update their avionics. On the 787 for instance you will loose almost everything . Another issue is spoofing is in ADS-B controlled airspace. Risk of collisions there.
NDBs are well on the way out and I wonder how much longer VOR will be kept on
VOR/DME and DME/DME are the main mitigation for loss of GPS in continental airspace, Now with the current world instability nobody is going to remove all of them . the plans were there but are now shelved. . Reducing the number , yes, eliminating them , no, not anymore, not in Europe at least. .