Operational Notes on Non-Directional Beacons (NDB) and Associated Automatic Direction Finding (ADF) Contents
Disclaimer These notes are a reproduction of a booklet originally published by the Civil Aviation Authority. Although these notes are no longer in print, they continue to provide a valuable resource and are made available as reference material for students, pilots and instructors. The notes have not been edited, and as they were written 20 or more years ago, may contain information relating to systems that are no longer in production or have been modernised. 1. 2. Introduction ................................................................................................................................ 1-1 NDB (Ground Station) ................................................................................................................ 2-1 2.1 Transmitter.......................................................................................................................... 2-1 2.2 Monitoring ........................................................................................................................... 2-2 3. Radio Compass Receiver .......................................................................................................... 3-1 4. Limitations of the NDB/ADF ....................................................................................................... 4-1 4.1 Night Effect ......................................................................................................................... 4-1 4.2 Co-Channel and Adjacent Interference from Other NDBs .................................................. 4-3 4.3 Mountain Effect ................................................................................................................... 4-4 4.4 Thunderstorms.................................................................................................................... 4-5 4.5 The Effect of Terrain ........................................................................................................... 4-6 4.6 Height Effects...................................................................................................................... 4-7 4.7 Most Appropriate NDB ........................................................................................................ 4-8 5. Operational Use of the Radio Compass..................................................................................... 5-1 5.1 Aural Null ............................................................................................................................ 5-1 5.2 Time and Distance .............................................................................................................. 5-2 5.3 Compass Bearings.............................................................................................................. 5-3 5.4 ‘Homing’ and Tracking Towards or Away from an NDB ...................................................... 5-4 5.5 Intercepting a Given Track .................................................................................................. 5-7
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飞行翻译公司 www.aviation.cn 本文链接地址：NDB.pdf
Disclaimer These notes are a reproduction of a booklet originally published by the Civil Aviation Authority. Although these notes are no longer in print, they continue to provide a valuable resource and are made available as reference material for students, pilots and instructors. The notes have not been edited, and as they were written 20 or more years ago, may contain information relating to systems that are no longer in production or have been modernised. 1. 2. Introduction ................................................................................................................................ 1-1 NDB (Ground Station) ................................................................................................................ 2-1 2.1 Transmitter.......................................................................................................................... 2-1 2.2 Monitoring ........................................................................................................................... 2-2 3. Radio Compass Receiver .......................................................................................................... 3-1 4. Limitations of the NDB/ADF ....................................................................................................... 4-1 4.1 Night Effect ......................................................................................................................... 4-1 4.2 Co-Channel and Adjacent Interference from Other NDBs .................................................. 4-3 4.3 Mountain Effect ................................................................................................................... 4-4 4.4 Thunderstorms.................................................................................................................... 4-5 4.5 The Effect of Terrain ........................................................................................................... 4-6 4.6 Height Effects...................................................................................................................... 4-7 4.7 Most Appropriate NDB ........................................................................................................ 4-8 5. Operational Use of the Radio Compass..................................................................................... 5-1 5.1 Aural Null ............................................................................................................................ 5-1 5.2 Time and Distance .............................................................................................................. 5-2 5.3 Compass Bearings.............................................................................................................. 5-3 5.4 ‘Homing’ and Tracking Towards or Away from an NDB ...................................................... 5-4 5.5 Intercepting a Given Track .................................................................................................. 5-7
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飞行翻译公司 www.aviation.cn 本文链接地址：NDB.pdf
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