How are ATC frequencies calculated?
Jessica Cortez
Updated on May 15, 2026
How you find the correct frequency depends on what you have with you in the cockpit. All F.A.A.-published enroute charts have center frequencies printed in “postage stamp” boxes on the chart. Each frequency box is shown on the chart in its relative location to the ground-based antenna. Find your location on an F.A.A.
In respect to this, what frequency is ATC?
All ATC communications are between 118.0 and 137.0 MHz.
Additionally, is ATC AM or FM? It's in AM. The VHF aero band extends from 108 to 135.975Mhz, while the UHF bands falls between 225 and 400Mhz. AM is used for both VHF/UHF traffic for two reasons. FM signals coming and going to an aircraft would be subject to the Doppler effect, wich can shift them off the established communications channels.
Furthermore, what are the aviation frequencies?
In the US the civil aircraft communications band (118-137 MHz) generally uses 25 kHz spaced channels. As of 2010 aeronautical enroute and flight test stations may use 8.33 kHz spaced channels in the 121.4-123.6, 128.825-132.0 and 136.5-136.875 MHz ranges.
Is listening to ATC illegal?
You can listen to air traffic control radio transmissions It is illegal under the Wireless Telegraphy Act 1949 2006 to listen to anything other than general reception transmissions unless you are either a licensed user of the frequencies in question or have been specifically authorised to do so by a designated person.
Related Question Answers
Can I listen to ATC?
The Live ATC app lets you to listen into the world of air traffic control at not only your flight's airport, but airports around the world. Download the Live ATC app from the Apple iTunes Store or the Android version from Google Play. You can even find a Windows phone version.What frequency do pilots use?
A typical aircraft VHF radio. The display shows an active frequency of 123.5 MHz and a standby frequency of 121.5 MHz.How can I listen to ATC on a plane?
You can listen to ATC by going to . It is a great resource even when you are not flying! It is also handy for flight students to learn the language of flight. They have a large network of radios, so you can pick one and listen.Is 121.5 still monitored?
Flight Service Stations will con- tinue to monitor 121.5 MHz, and aircraft pilots are technically still required to monitor this frequency at all times if it's possible with installed equipment. After all, 121.5 MHz still remains the GARD frequency for airborne emergencies.What does ATC stand for?
ATC| Acronym | Definition |
|---|---|
| ATC | Air Training Corps (United Kingdom and Australia) |
| ATC | Certified Athletic Trainer |
| ATC | Against the Current (band) |
| ATC | Access to Care (various organizations) |
Where do I find FSS frequency?
Normally, you would communicate with Flight Service through the frequencies shown on the sectional chart. The Flight Service frequencies are listed in a box above certain VOR stations. The most common frequencies are 122.2, 122.4, or 122.6.Is VHF or UHF better?
UHF Radio Advantages In general, UHF radios are better for indoor use because their wavelengths are shorter and better able to penetrate through steel and concrete. UHF radios broadcast at between 300 MHz and 3 GHz. VHF radio signals tend to degrade more than UHF signals indoors.What frequencies do cell phones use?
There are two common frequency bands that all cell phone carriers use. The Cellular band commonly referred to as 1900 uses the frequencies 1850-1990. The other band is PCS which is the 800 MHz band uses frequencies in the 824-894 range. Most of our cellular phone signal products work on one or the other.What radios do aircraft use?
Airband or aircraft band is the name for a group of frequencies in the VHF radio spectrum allocated to radio communication in civil aviation, sometimes also referred to as VHF, or phonetically as "Victor". Different sections of the band are used for radionavigational aids and air traffic control.Are aircraft radios VHF or UHF?
1 Answer. The UHF air band operates in AM in a general range of 225.0–399.95 MHz. Many ATC functions have both VHF and UHF frequencies. The bands 235-322 MHz and 335.4-399.9 MHz are also allocated on a primary basis to the mobile-satellite service, limited to military operations.What is FSS frequency?
FSS frequencies are all in the 122 and 123 MHz series; for example, 122.25, 122.3, 122.35, 122.45, 122.55, 122.6, 122.65, and 123.65 MHz. Remember the universal FSS frequency of 122.2 MHz, and that Flight Watch is 122.0. All FAA facilities monitor the emergency frequency, 121.5 MHz.What is a departure frequency?
Departure Frequency is the one use to communicate with Departure Control at take off.Why do pilots say Niner?
The reason for these somewhat strange pronunciations is to encourage the pilot/controller to enunciate clearly, so that the numbers are clearly understood. The reason for “Niner” is that “Nine” can be easily muffled, slurred, or confused with other words (particularly the number Five/Fife).What do pilots say before landing?
Once the tower has cleared an aircraft to land, the pilot will respond “roger, cleared to land”. This response is required whether VFR (with operating tower) or IFR. When operating to a field without a tower, a pilot will “transmit in the blind” his intention to land.When should I contact ATC?
Whenever you are operating under a clearance—whether on the ground or in the air—you have to inform ATC of any deviations. However, other concerns—controlling the aircraft—take priority. So you actually inform ATC as soon as you can safely do it, after the fact.What does heavy mean ATC?
Heavy (aeronautics) From Wikipedia, the free encyclopedia. In the United States, the term heavy is used during radio transmissions between air traffic control and any aircraft which has been assigned a maximum takeoff weight (MTOW) rating of 136 tonnes (300,000 lb) or more.What language does ATC use?
English languageWhat is an ATC clearance?
A clearance issued by ATC is predicated on known traffic and known physical airport conditions. An ATC clearance means an authorization by ATC, for the purpose of preventing collision between known aircraft, for an aircraft to proceed under specified conditions within controlled airspace.What do helicopter pilots say when taking off?
ATC will either say “Expedite Departure” or “No Delay” to let the aircraft know to get it in gear and take off immediately. A radio call from ATC would go something like this: ATC: “Cessna 128DP, cleared for take off, runway 16, no delay, straight out departure approved”How do I become a US ATC?
How Do You Become an Air Traffic Controller?- Be a United States citizen.
- Be age 30 or under (on the closing date of the application period)*
- Pass a medical examination.
- Pass a security investigation.
- Pass the FAA air traffic pre-employment tests.
- Speak English clearly enough to be understood over communications equipment.
