Link to this headingAirport Signals

Find the frequencies here

Link to this headingUnicom

A common traffic-advisory frequency, If its a major airport its used for airport services like fuel, FBO coordination.

Link to this headingApproach signal

Different Angles have different frequencies for approaching airplanes

  • 127.6 for angles 270-330
  • 128.55 for angles 090-240
  • 132.7 for angles 331-089
  • 132.8 for angles 241-269

Link to this headingGround Control

Tower directing Airplanes on runways and taxiways

Link to this headingTower

Take off, landing and planes in the 6.5 Nautical Mile radius of the airport

Link to this headingDeparture

Used after takeoff while climbing out of the airport area.

Link to this headingAutomated Weather Observing System (AWOS)

Local FAA Weather Service Broadcast that sends a 20-30 second weather message updated each minute.
Upper reporting limit: 12,000 feet ceiling, 10 miles visibility

AWOS Levels:

  • AWOS-A: Altimeter setting only
  • AWOS-AV: Altimeter and visibility
  • AWOS-1: Altimeter, wind (magnetic north), temperature, dew point, density altitude
  • AWOS-2: AWOS-1 plus visibility
  • AWOS-3: AWOS-2 plus cloud/ceiling data
  • AWOS-3P: AWOS-3 plus precipitation type identification
  • AWOS-3PT: AWOS-3P plus thunderstorm/lightning reporting
  • AWOS-3T: AWOS-3 plus thunderstorm/lightning reporting
  • AWOS-4: All AWOS-3 sensors plus precipitation occurrence/type/accumulation, freezing rain, thunderstorm/lightning, runway surface conditions

Link to this headingAWOS-3 / AWOS-3PT

Has similar information but come from different sensors

Link to this headingAutomated Surface Observing System (WX ASOS)

National Weather Service Broadcast that has hourly weather

Has the same information from AWOS-3 but also includes

  • precipitation type/intensity, thunderstorms, fog, haze
  • Wind shifts, peak gusts
  • rapid pressure changes, accumulated precipitation
  • Cloud layers and visibility

Link to this headingDigital Automated Terminal Information Service (D-ATIS)

Digital version of the weather + airport conditions for arrival/departure.

Info: Some airports have different frequencies for arrivals and departures

Link to this headingCLEARANCE DELIVERY

Where to get IFR clearance before taxiing.

Link to this headingPRE-TAXI CLEARANCE

Get Clearence before being able to switch to Ground Control frequency

Link to this headingSTAR (Arrival Routes) Frequencies

These help organize the flow of inbound traffic from different directions.

Link to this headingEmergency Frequencies

121.5 (VHF) & 243.0 (UHF)