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What is meant by the term night effect" when using an aircraft's Automatic Direction Finding (ADF) equipment? Night effect refers to the fact that:"
A) All Non Directional Beacon (NDB) transmitters are turned-off at dusk and turned-on at dawn.
B) Non Directional Beacon (NDB) transmissions can bounce-off the Earth's ionosphere at night and be received at almost any direction.
C) An aircraft's ADF transmissions will be slowed at night due to the increased density of the Earth's atmosphere after sunset.
D) An aircraft's ADF antennas usually collect dew moisture after sunset which decreases their effective reception distance from an NDB transmitter.
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