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Chapter 3 - Non-Directional Beacon (NDB) Questions Graded A+
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Chapter 3 - Non-Directional Beacon (NDB)
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Chapter 3 - Non-Directional Beacon(NDB)
What is the frequency range of a NDB? - answer190 - 1750 KHz
What is the difference between a locator beacon and an NDB? - answer Locator
beacons have a shorter range than an NBD. Locator beacons have a range of 10 - 25
nm whereas a NDB has a range of 50 or more nm.
What are the four elements that make up and airborne part of the NDB system? -
answer Automatic Direction Finder (ADF)
Indicator
Loop antenna
Sense antenna
What is the purpose of the sense antennas in conjunction with the loop antenna? -
answer It has the effect of removing on of the null points and therefore resolving the 180
degree ambiguity.
What is the function of the BFO button? - answer Used in NON/A1A NDBs.
It interrupts the carrier wave.
What is the relationship between power and range? - answer Range ∝ √Power
What is the formula for the QDM? - answer Magnetic heading + Relative Bearing =
QDM
What are the errors of an NDB (6)? - answer Static interference
Night Effect
Stagnation interference
Costal Refraction
Multi-path Propagation
Quadrantal error
When is the costal refraction error zero? - answer When the NDB is located on the
coast line or the radio waves cross at 90 degrees.
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