Tag Archives: NDB

Given: W/V (T) 230/ 20 kt, Var. 6E, TAS 80 kt What relative bearing from an NDB should be maintained in order to achieve an outbound course of 257(degrees)(M) from overhead the beacon?

Given: W/V (T) 230/ 20 kt, Var. 6E, TAS 80 kt What relative bearing from an NDB should be maintained in order to achieve an outbound course of 257(degrees)(M) from overhead the beacon?
A: 352
B: 172
C: 008
D: 188

 

 

 

 

 

 

 

 

Answer: D

“Night Effect” which causes loss of signal and fading, resulting in bearing errors from NDB transmissions, is due to:

A: interference from other transmissions and is maximum at dusk when east of the NDB
B: skywave distortion of the null position and is maximum at dawn and dusk
C: static activity increasing at night particularly in the lower frequency band
D: the effect of the Aurora Borealis

 

 

 

 

 

 

 

 

Answer: B

Which of the following is correct regarding the range of an NDB?

A: The range is limited to the line of sight.
B: Aircraft height is not limiting for the reception of signals from the NDB.
C: The range of an NDB will most likely increase at day time compared to night time.
D: The transmitter power of the NDB station has no affect on the range.

 

 

 

 

 

 

 

 

Answer: B

Factors liable to affect most NDB/ADF system performance and reliability include:

A: height error – station interference – mountain effect
B: static interference – station interference – latitude error
C: static interference – night effect – absence of failure warning system
D: coastal refraction – lane slip – mountain effect

 

 

 

 

 

 

 

 

Answer: C