Believe that Minneapolis has approved dGPS approaches, as they have been under trial by NorthWest (I think) and possibly one other location.
In addition, the Garmin 430/530 will be upgradeable to use LAAS, in the future. So far as I know, no other available GPS receiver for general aviation has this feature.
I have used the King KLN89B for six years now and have found that GPS approaches have been VERY accurate here in the western US. The only time that they have not been available is when scheduled "maintenance" is performed by the DOD, but this is published well in advance and is usually for a four hour period just after midnight, local time, and affects a 400nm circle, generally from White Sands, New Mexico or China Lake, California.
Last edited by 411A; 29th April 2002 at 05:56.