When I fly the Pss A320 using Rcv3 I can be right on course but the Gps in fs2002 will show a slight difference. Rcv keeps chewing me out for being off course. If I fly with reference to the gps I am unable to use the LNAV feature.Rich

How are you loading the plan into the A320 MCDU? If you are using the facility to import a FS2002 flight plan then you will need to manually add the first waypoint into the MCDU, because the PSS Airbus' import code always loses the first waypoint. What then happens is that RC is expecting you to fly to the real first waypoint, while the MCDU is taking you to the second.Other than that the MCDU should always be close enough to the heading expected by RC, and the controller shouldn't chew you out.Ian