Automatic Direction Finder (ADF) frequencies are primarily used in aviation to help pilots navigate by receiving signals from Non-Directional Beacons (NDBs). NDBs transmit on frequencies in the range of 190 kHz to 1750 kHz. Here is a general list of ADF frequency ranges and specific examples of NDB frequencies:
ADF Frequency Ranges
- Low Frequency (LF): 190 kHz to 535 kHz
- Medium Frequency (MF): 530 kHz to 1750 kHz
Examples of NDB Frequencies
Below are some examples of NDB frequencies used around the world. Note that actual frequencies can vary by region and specific NDB:
North America:
- 198 kHz: NDB “AP” – Appleton, Wisconsin, USA
- 209 kHz: NDB “ZKF” – Kitchener, Ontario, Canada
- 233 kHz: NDB “LE” – Lansing, Michigan, USA
- 375 kHz: NDB “OY” – Ottawa, Ontario, Canada
- 414 kHz: NDB “B” – Boston, Massachusetts, USA
Europe:
- 283 kHz: NDB “BGI” – Bergamo, Italy
- 331 kHz: NDB “SN” – Shannon, Ireland
- 368 kHz: NDB “FF” – Frankfurt, Germany
- 385 kHz: NDB “MTN” – Manchester, UK
- 444 kHz: NDB “SKI” – Stockholm, Sweden
Asia:
- 218 kHz: NDB “NRT” – Narita, Japan
- 370 kHz: NDB “XU” – Xuzhou, China
- 430 kHz: NDB “BOM” – Mumbai, India
- 489 kHz: NDB “BKK” – Bangkok, Thailand
- 513 kHz: NDB “IC” – Islamabad, Pakistan
Australia and Oceania:
- 245 kHz: NDB “SY” – Sydney, Australia
- 338 kHz: NDB “WLG” – Wellington, New Zealand
- 356 kHz: NDB “ASP” – Alice Springs, Australia
- 380 kHz: NDB “DRW” – Darwin, Australia
- 525 kHz: NDB “MKY” – Mackay, Australia
Africa:
- 287 kHz: NDB “CPT” – Cape Town, South Africa
- 320 kHz: NDB “DKR” – Dakar, Senegal
- 348 kHz: NDB “CAI” – Cairo, Egypt
- 375 kHz: NDB “LOS” – Lagos, Nigeria
- 429 kHz: NDB “NBO” – Nairobi, Kenya
Note
The frequencies listed above are examples and may not be current. Pilots and aviation professionals should always refer to the latest official publications and charts for accurate and up-to-date information on NDB frequencies.