FMS use below MSA?
I am currently flying a turboprop with a single FMS unit, our ops manual states that the FMS must not be used for primary navigation below MSA.
Does this mean that the AFCS cannot be coupled with the FMS or just that independent nav equipment must be used to determine position/track?
If we define the pilot as the primary navigator rather than the autopilot, is it legal to program a pseudo-vortac to follow an NDB approach and monitor the aircraft remains within the approach tolerances?
Your opinions appreciated,
Chris