How do I request a SELCAL check?
The aircraft station should contact the appropriate aeronautical station and request a pre-flight SELCAL check and, if necessary, give its SELCAL code. When primary and secondary frequencies are assigned, a SELCAL check should normally be made first on the secondary frequency and then on the primary frequency.
What is a SELCAL check?
In international aviation, SELCAL or SelCal is a selective-calling radio system that can alert an aircraft’s crew that a ground radio station wishes to communicate with the aircraft. The use of SELCAL allows an aircraft crew to be notified of incoming communications even when the aircraft’s radio has been muted.
What is SELCAL in flight plan?
Selective Calling (SELCAL) is an International Civil Aviation Organization (ICAO) managed communications method used to notify aircraft that a ground radio station wishes to communicate.
What are SELCAL codes?
SELCAL is a signaling method which can alert an individual aircraft that a ground station wishes to communicate with it. SELCAL signals can be transmitted over either HF or VHF RTF. A SELCAL transmission consists of a combination of four preselected audio tones which takes approximately two seconds to transmit.
How many tones are in a SELCAL code?
A SELCAL transmission consists of a combination of four preselected audio tones which takes approximately two seconds to transmit.
What is SELCAL number?
SELCAL is a signaling method which can alert an individual aircraft that a ground station wishes to communicate with it. SELCAL codes are assigned to aircraft operators and not to individual aircraft. Aviation Spectrum Resources (ASRI) is the registrar of SELCAL codes worldwide.
What is SELCAL stand for?
Selective Calling
Selective Calling (SELCAL) is an International Civil Aviation Organization (ICAO) managed communications method used to notify aircraft that a ground radio station wishes to communicate.
How are the characters in a SELCAL code represented?
SELCAL codes are made up of the various combinations of alphabetic characters represented as two pairs (for example AC-BD), with each character representing a unique audio frequency (see table at the bottom of this page).
Who is the official registrar of SELCAL codes?
From that point, ARINC became the official registrar of SELCAL codes, accepting all SELCAL applications directly, as well as providing an annual report to ICAO with a summary of SELCAL usage. In 2006, the ARINC section responsible for SELCAL was re-structured into a separate company called Aviation Spectrum Resources, Inc. (ASRI).
Where does the SELCAL code go on an airplane?
Almost every aircraft operating over the ocean or in remote areas has a SELCAL code registered with ASRI. The SELCAL code is entered into field 18 of the aircraft’s flight plan that is filed with the relevant aviation authorities.
How is a SELCAL code transmitted to a ground station?
To transmit a SELCAL code, these audio frequencies are modulated onto the selected voice channel at the ground station transmitter. This can be for either long range High Frequency (HF) communications, or more localized Very High Frequency (VHF) voice channels.