off-route obstruction-clearance altitude
- off-route obstruction-clearance altitude
An off-route altitude that provides obstruction clearance of a 2000-ft (600 m) buffer in designated mountainous areas and a 1000-ft (300 m) buffer in nonmountainous terrain. It may not be possible at this altitude to receive signals from ground-based NAVAIDs (navigational aids), ATC (air traffic control), and other communications agencies.
Aviation dictionary.
2014.
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