AVI3100

Aviation Bearings

Three-digit bearings are the universal language of aviation navigation. In this topic you will learn why aviation uses this system, how to read and communicate bearings, calculate reciprocals, and determine the shortest turn direction.

Pre-trigonometry level · 5 concepts · Interactive simulators included

1

Three-Digit Bearings

AVI310101

Why aviation uses exactly three digits. Cardinal directions, compass reading, ICAO radio phraseology.

Place BearingIdentify Bearing
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2

Bearing FROM and TO

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The compass cross method. "Bearing of A from B" means stand at B, face North, turn clockwise to A.

Two-Plane Bearing
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3

Reciprocal Bearings

AVI310103

The ±180° rule. Every bearing has an opposite — the reciprocal. VOR radials, 180° turns.

Reciprocal Placer
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4

Why FROM/TO Is a Reciprocal

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One line, two directions. The compass cross method and the ±180° shortcut are the same idea. Runway numbering.

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5

Turn Direction

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Two ways around the compass — which is shorter? The clockwise difference method. Why ATC always specifies direction.

Turn Direction
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AVI3100 Aviation Bearings · 37 pages

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