Domanda 57, Aircraft General Knowledge - Instrumentation - ATPL - Airline Transport Pilot license

A navigation mode used to monitor the FMS position.
An operating mode used to intercept radials To or From a flight plan waypoint.
The normal navigation mode for FMS which do not use Inertial navigation Systems INS to compute the aircraft position.
A back up navigation mode to compute a FMS position when the other navigation sensors are no longer operating.