I have to admit, when practicing it in the sim, I remember that some waypoints seemed to not be connected anymore. Anyone know more about this?
JammedStab...
Alternate (CDU) navigation can only understand basic point-to-point navigation. If the original FMC route contained SIDs/STARs, the CDU's cannot handle these, so these legs are removed and route discontinuities occur.
If the FMCs are
not permanently lost, the full route can sometimes be restored (but will require re-executing).