zaro

Why is 123.45 called "Finger"?

Published in Radio Frequencies 2 mins read

The frequency 123.45 MHz is nicknamed "Finger" because its digits appear in a natural counting order. This makes it easy to remember and, unfortunately, often misused by pilots.

The Story Behind the Nickname

  • As the reference states, 123.45 MHz is frequently misused, which led to the adoption of the term "Finger."
  • The digits progress in an ascending, sequential order (1, 2, 3, 4, 5), making it easy to recall compared to other frequencies.

Frequency Use and Misuse

  • While frequencies like 123.3 and 123.5 MHz are designated for gliders and hot air balloons, 123.45 is a less official, general frequency that gets abused by pilots.
  • This misuse is primarily due to its simplicity and memorability, resulting in excessive and incorrect use of the channel.

Other Frequencies in Comparison

Here is a comparison of frequencies mentioned in the context:

Frequency (MHz) Primary Use Note
123.3 Gliders and Hot Air Balloons Specific, assigned use
123.5 Gliders and Hot Air Balloons Specific, assigned use
122.9 Historically used frequency Not typically used now
123.45 "Finger" - misused due to digit order Misuse due to ease of recall, digits in natural counting order

In Summary

The nickname "Finger" for 123.45 MHz arose from the easy-to-remember numerical sequence of its digits, ironically contributing to its misuse by pilots on this otherwise non-specific channel.