Your First Listen: Understanding Aviation Radio

Your First Listen: Understanding Aviation Radio

You have bought an airband radio (or downloaded a scanner app), tuned to 118.15 MHz, and you are hearing voices — but it sounds like a foreign language. Do not worry. Aviation radio follows strict conventions, and once you learn the pattern, it all starts to make sense surprisingly quickly.

This lesson will teach you the basic structure of what you hear on the Prestwick frequencies.

The Basics: Who, Who, What

Every radio call in aviation follows a simple structure:

1. Who you are calling — the name of the ATC unit

2. Who you are — the aircraft callsign

3. What you want (or what you are reporting)

For example, a Ryanair flight contacting Prestwick Tower might say:

> "Prestwick Tower, Ryanair five-seven-alpha, ready for departure runway one-two."

Let us break that down:

• Prestwick Tower — the unit being called
• Ryanair five-seven-alpha — the aircraft callsign (often a flight number or registration)
• Ready for departure runway one-two — the message

ATC will then reply, addressing the aircraft first:

> "Ryanair five-seven-alpha, Prestwick Tower, runway one-two, cleared for take-off, wind two-seven-zero degrees, eight knots."

Callsigns

Aircraft callsigns come in different forms:

Airline Callsigns

Airlines use their radio telephony callsign (which is not always the same as the airline name) followed by the flight number. Some examples you might hear at Prestwick:

General Aviation Callsigns

Smaller aircraft use their registration. A UK-registered light aircraft might be Golf-Bravo Oscar Foxtrot Kilo (G-BOFK). Once established in communication, this is often shortened to Oscar Foxtrot Kilo or even Foxtrot Kilo.

The Phonetic Alphabet

Aviation uses the NATO/ICAO phonetic alphabet to avoid confusion between similar-sounding letters:

You will hear these constantly. The airport identifier EGPK would be spoken as "Echo Golf Papa Kilo" if ever used on frequency.

How Numbers Are Spoken

Numbers in aviation are spoken differently from everyday English to reduce ambiguity:

So runway 12 is "runway wun-too" and a frequency of 121.20 is "wun-too-wun decimal too-zero".

Altitudes are spoken digit by digit up to a point: 3,000 feet is "tree tousand feet". Flight levels are also digit by digit: FL350 is "flight level tree-fife-zero".

What You Will Hear on Prestwick Tower (118.15 MHz)

Tower handles the runway and immediate airfield. Typical transmissions include:

• Take-off clearances: "Ryanair five-seven-alpha, runway wun-too, cleared for take-off, surface wind too-seven-zero degrees, ait knots"
• Landing clearances: "Ryanair nine-two-bravo, runway tree-zero, cleared to land, wind too-fife-zero degrees, wun-too knots"
• Taxi instructions: "Ryanair five-seven-alpha, taxi to holding point Alpha one, runway wun-too"
• Circuit traffic: "Golf-Oscar Foxtrot Kilo, report final, runway wun-too, number two, follow the Cherokee on base"

What You Will Hear on Prestwick Approach (121.20 MHz)

Approach handles arriving and departing traffic in the wider area. Typical transmissions include:

• Descent instructions: "Ryanair nine-two-bravo, descend altitude four tousand feet, QNH wun-zero-wun-tree"
• Radar vectors: "Ryanair nine-two-bravo, turn right heading too-seven-zero, vectors ILS runway tree-zero"
• Approach clearances: "Ryanair nine-two-bravo, eight miles from touchdown, cleared ILS approach runway tree-zero"
• Handoffs to Tower: "Ryanair nine-two-bravo, contact Prestwick Tower, wun-wun-ait decimal wun-fife"

Readback Requirements

Certain instructions are so critical that the pilot must read them back — repeat them to confirm they heard correctly. The controller listens to the readback to check it is right. Items that must always be read back include:

• Runway in use
• Clearances to take off, land, or enter a runway
• Altimeter settings (QNH/QFE)
• Altitude or flight level instructions
• Heading instructions
• Speed instructions
• Frequency changes

If you hear a pilot repeat back an instruction incorrectly, listen for the controller to say "Negative" and issue the correct instruction again. Getting the readback wrong could be dangerous.

The ATIS — Your Starting Point

Before you start listening to the live action, tune to 127.125 MHz (Scottish ATIS). This automated broadcast will tell you:

• Which runway is in use
• The current wind direction and speed
• Visibility and cloud cover
• The atmospheric pressure (QNH)
• Any relevant notices

Each ATIS update is given a letter identifier (Alpha, Bravo, Charlie, etc.). When aircraft first contact ATC, they say which ATIS information they have, so the controller knows they are up to date. For example: "Prestwick Approach, Ryanair five-seven-alpha, inbound from Dublin, with information Golf."

Tips for New Listeners

1. Start with ATIS — it is slower and gives you context for what you are about to hear.

2. Listen to Tower first — Tower conversations tend to be shorter and more predictable than Approach.

3. Do not try to understand everything — at first, just try to pick out callsigns and the runway number. The rest will come with practice.

4. Keep a notebook — jot down callsigns you hear. You can cross-reference them with a flight tracker to see which aircraft they belong to.

5. Be patient — some days Prestwick is quiet. Check the flight schedule or a live tracker to know when to expect action.

A Note on Legality

In the United Kingdom, it is legal to own and use an airband scanner to listen to aviation frequencies. However, it is an offence under the Wireless Telegraphy Act to share or act upon what you hear in a way that could compromise safety or security. Listen, learn, and enjoy — but keep what you hear to yourself.

Summary

Aviation radio follows a strict "who-who-what" format. Callsigns, the phonetic alphabet, and special number pronunciation are the building blocks. Start with the ATIS on 127.125 MHz to get oriented, then work your way into Tower (118.15 MHz) and Approach (121.20 MHz). Within a few hours of listening, you will be surprised how much you understand.