Automatic Direction Finding by NDB

Automatic Direction Finding by NDB

1. Range

   • The greatest range at which NDB/ADF wil provide useable information is over sea by day.

2. The BFO selector on an ADF receiver is used to hear the IDENT of some NDB stations radiating a continuous wave signal.

3. Errors

   • The most significant ADF error is static interference from Cb's
   • Quadrantal Errors are caused by signal bending by the aircraft metallic surfaces

4. And NDB transmits a signal pattern in the horizontal plane which is omnidirectional