Greetings
as far as I know, the IRS, (Omega before it was decommissioned) is the only Sole mean of navigation, even for enroute consideration GPS still primary means, LITTON recently attempted to certify the AIME solution (Autonumous Integrity Monitoring Extrapolation) using Kalman filtering, but I am not sure if they did get it.
We have to remember that the Integrity is the GPS weak point, and therefore it cannot be certified sole mean, the last attempt I know of was the Rio de Janiero ICAO meeting in 1998, integrity and jamming closed the subject.
Last edited by kijangnim; 3rd August 2008 at 18:00.
Reason: adding missing omega