Nondirectional Beacon (NDB)
A nondirectional beacon (NDB) is a radio beacon that broadcasts low, medium or UHF frequency signals without a specific direction. The signals from an NDB can be picked up by automatic direction finding equipment installed in an aircraft equipped with this technology. NDBs are commonly located near airports, and they are used to help pilots navigate during flights, especially during takeoff and landing.
Unlike directional beacons, which transmit signals in a specific direction, NDBs are used for general navigation, and pilots can pick up the signals from any angle. They are particularly useful in areas with limited ground-based navigation aids, such as remote regions, mountainous terrain, and over water.
NDBs are categorized based on their frequency. Low-frequency (LF) NDBs operate in the range of 190 to 435 kHz and have a range of up to 250 nautical miles (NM). Medium-frequency (MF) NDBs operate in the range of 510 to 535 kHz and have a range of up to 100-150 NM. UHF NDBs operate in the range of 900 to 1290 MHz and have a range of up to 25 NM.
In summary, NDBs are an essential component of the aviation industry, and they play a vital role in helping pilots navigate during flights. They provide a reliable and cost-effective means of navigation, especially in areas with limited ground-based navigation aids.
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