Why Ships Say "Channel 16" and Aircraft Say "121.5 MHz": Two Frequency UIs Born from the Same VHF Radio

For those who use radio at sea, "Channel 16" is a special term.In the world of aviation, "121.5 MHz" is a special number.Both are deeply related to distress and emergency communications, and both are ...
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What is radio frequency?

Radio frequency (RF) is a measurement representing the oscillation rate of electromagnetic radiation spectrum, or electromagnetic radio waves, from frequencies ranging from 300 gigahertz (GHz) to as ...