Non-Directional Beacon

Definition

Non-Directional Beacon is defined as a radio beacon operating in the MF or LF band-widths.

Description

A non-directional beacon (NDB) is a radio beacon operating in the MF or LF band-widths. NDBs transmit a signal of equal strength in all directions. The signal contains a coded element which is used for station identification (normally 1-3 letters in Morse Code).

NDBs are often associated with Non-Precision Approach procedures.

Automatic Direction Finding (ADF) (ADF) equipment on board aircraft uses bearings from NDBs for navigation purposes.

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