Radio Navigationmedium#1112
Coastal refraction of NDB signals causes:
A
The signal to weaken over water
B
The ADF bearing to bend toward the coastline
CorrectC
The ADF bearing to bend away from the coastline
D
No effect on ADF accuracy
Explanation
When an NDB signal crosses a coastline at an angle, the wave bends toward the shoreline (the denser medium), causing ADF bearing errors.
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