Does ATC use UHF or VHF?

Does ATC use UHF or VHF?

Many ATC functions have both VHF and UHF frequencies. For example, Newark Liberty Tower uses 118.3 and 257.6. ATC will often broadcast on both the VHF and UHF frequencies.

What radio frequency do airports use?

At nontowered airports, a unicom frequency is used. Typical unicom frequencies are 122.7, 122.72, 122.8, 122.97, 123.0. 123.05, and 123.07 MHz. At controlled airports, ground frequencies are likely 121.3, 121.5, 121.7, and 121.9.

What is the procedure for loss of communication radio when arriving at an airport with an operating control tower?

Transmitter and Receiver Inoperative: Remain outside or above the Class D surface area until the direction and flow of traffic has been determined; then, join the airport traffic pattern and maintain visual contact with the tower to receive light signals. Acknowledge light signals as noted above.

Which frequency is used for ATC communication?

The ultra-high frequency (UHF) radio infrastructure (225 MHz – 400 MHz) is used by most air navigation service providers (ANSPs) as a fundamental alternative to ensure ATC communications with non-8.33 kHz equipped State aircraft operating GAT/IFR and, in some cases to support OAT flights.

What is the frequency range of VHF?

Radio frequency range from 30 MHz to 299 MHz. The sub-bands most commonly used by fire are: VHF-FM Lo band: Frequency Modulation 30 MHz – 80 MHz, of which fire frequencies are between 30 MHz and 50 MHz.

How do ATC frequencies work?

Radio communication between the control facilities and the aircraft take place on a number of radio frequencies. These frequencies are in the VHF (Very High Frequency) frequency range of 108 to 136 MegaHertz (MHz). A radio or a scanner capable of receiving those frequencies is required to hear the communications.

How do I change the ATC frequency on VHF-L?

For example, if ATC (on VHF-L) asks us to change to another ATC frequency on 133.65 MHz, we’d type “13365” on the number keys and press the first key-select button on the left-hand side. When we do this, two things happen. Firstly, the active VHF-L frequency changes to 133.65 as requested.

Why do I need to acknowledge ATC when changing frequencies?

When advised by ATC to change frequencies, acknowledge the instruction. If you select the new frequency without an acknowledgement, the controller’s workload is increased because there is no way of knowing whether you received the instruction or have had radio communications failure.

Why are radio communications important to ATC?

Radio communications are a critical link in the ATC system. The link can be a strong bond between pilot and controller or it can be broken with surprising speed and disastrous results. Discussion herein provides basic procedures for new pilots and also highlights safe operating concepts for all pilots.

How do Volunteers listen to ATC broadcasts?

Perhaps surprisingly, volunteers who live within radio range of airports (generally 15 miles) use spare radio and computer equipment to relay “airband” transmissions into the LiveATC.net audio network. You can bring up the feeds via a Flash player or MP3, and there’s even a series of apps for smartphones.