The amplitude modulated variable phase...

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Question 1 of 20lSwuYobVntT9Dp1D0oPb

The amplitude modulated variable phase signal and the frequency modulated reference phase signal of a Very-high-frequency Omnidirectional Range (VOR) station used for aircraft navigation are synchronized so that both signals are in phase with each other at ____________ of the VOR station.

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lSwuYobVntT9Dp1D0oPb

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🔍 Key Concepts

• VOR basics – how the reference phase (FM) and variable phase (AM) signals define aircraft bearing from the station • Difference between true north and magnetic north in navigation systems • How bearing is expressed around a VOR station (0°/360° and cardinal directions)

💭 Think About

• Ask yourself: At what reference direction (north/south, true/magnetic) is the VOR system designed to have both signals aligned in phase? • Consider how pilots actually read a VOR indicator: are the radials labeled in true or magnetic bearings? • Think about what heading or radial is used as the zero reference in VOR charts and cockpit instruments.

✅ Before You Answer

• Verify whether VOR radials are based on magnetic or true north in standard aviation/navigation practice • Confirm that 0° and 360° represent the same directional line, and relate that to north vs. south around a station • Check which option correctly combines the reference direction (north/south) and the type of bearing (true/magnetic) used by operational VORs.

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