Introduction - An arcing approach makes use of an arcing maneuver to position the aircraft
inbound on the final approach course. Arcing approaches are normally identified by VOR/DME
or TACAN in the approach plate margin meaning DME is required. The margin identification
may not require DME if an arcing maneuver is depicted as an alternative to a procedure turn
(Figure 14). However, when arcing to final, DME is required. If executing an arcing maneuver
with the term "No PT" displayed along the arcing track, the procedure turn is not authorized.
DME provides more accurate fixing of an aircraft's position on final approach because it is
not affected by wind, unlike the timing used on a pure VOR approach.
INSTRUMENT DEPARTURES AND APPROACHES