initial approach segment

initial approach segment

The segment of an instrument approach procedure between the initial approach fix and the intermediate approach fix or, where applicable, the final approach fix or point (ICAO). In the initial approach, the aircraft has departed the en route structure and is maneuvering to enter the intermediate approach segment. The aircraft speed and configuration will depend on the distance from the aerodrome and the descent required. The initial approach segment provides at least 1000 ft (300 m) of obstacle clearance in the primary area. Normally, track guidance is provided along the initial approach segment to the intermediate fix, with a maximum angle of interception of 90° for a precision approach and 120° for a non-precision approach. Where no track guidance is provided, the alternative is to have a dead-reckoning segment from a fix to the localizer. Where no suitable initial approach fix or intermediate fix is available, a reversal procedure, racetrack, or holding procedure is required to be flown. See initial approach (i).
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
An arc is usually an initial approach segment charted as a heavy black line, making it part of the approach.
A DME arc is an initial approach segment. A feeder route designates routes for aircraft to proceed from an en route fix to the IAF.
ALPA further asked if flying a DME arc initial approach segment could be substituted for a published IAF along any portion of the arc.

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