GM1 NCO.IDE.A.195(a) Navigation equipment
ED Decision 2022/012/R
NAVIGATION EQUIPMENT — SCOPE OF RNAV SUBSTITUTION
(a) Applications of RNAV substitution include use to:
(1) determine aircraft position relative to or distance from a VOR, marker, DME fix or a named fix defined by a VOR radial or NDB bearing;
(2) navigate to or from a VOR, or NDB, except as lateral guidance in the FAS of an IAP;
(3) hold over a VOR, NDB, or DME fix;
(4) fly an arc based upon DME;
(5) fly an overlay of a conventional departure, arrival, approach or route except as lateral guidance in the FAS of an IAP.
(b) RNAV substitution for ADF, marker and VOR may be used where airborne and/or ground-based equipment is not available.
(c) RNAV substitution for DME may be used where the ground-based DME transponder is unserviceable or the airborne DME transceiver is found to be unserviceable in flight. Caution must be exercised by the pilot-in-command when calculating and using GNSS distances to the active waypoint as reference points are often different.
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