Originally Posted by
zlin77
Can be useful in the pre-flight stage checking True Tracks and Distances on the FMC legs pages against the flight plan True Tracks, also airborne with amended clearances in the NATS System it pays to check True Tracks and Distances against the published charted ones…if it agrees, you are on the correct cleared route.
Correct. The magnetic tracks seem to frequently be quite far off, I suppose depending on variation.