What is SELCAL code of aircraft?

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 SELCAL codes are available?

The current rules for SELCAL code assignment, with sixteen available letters, limit the number of possible allowable codes worldwide to 10,920.

What is aircraft type code?

An aircraft type designator is a two-, three- or four-character alphanumeric code designating every aircraft type (and some sub-types) that may appear in flight planning. These codes are defined by both the International Civil Aviation Organization (ICAO) and the International Air Transport Association.

How do I get SELCAL code?

An individual aircraft is given a SELCAL code upon application to the SELCAL code registrar, Aviation Spectrum Resources, Inc. (ASRI). The code is technically assigned to the owner-operator of the aircraft rather than the aircraft itself; if an aircraft is sold, the new owners-operators must apply for a new code.

How do you make a SELCAL code?

An example of a SELCAL code would be AC- BD. Each transmitted code should be made up of two consecutive tone pulses, with each pulse containing two simultaneously transmitted tones. The pulses should be of 1.0 plus or minus 0.25 seconds duration, separated by an interval of 0.2 plus or minus 0.1 second.

What is VDL mode2?

VDL Mode 2, in its broadest sense, is the term that is used to describe a suite of air-ground protocols that increase the data rate of the air-ground link to 31,500 bits per second.

What is CPDLC DCL?

CPDLC-DCL allows pilots to request and receive initial and revised Air Traffic Control (ATC) Clearances digitally using CPDLC over VHF Data Link (VDL) Mode 0/A and Mode 2 data link. These services are available at various airports in U.S. domestic airspace as indicated on the airport diagram and our website.

What is SELCAL code Vatsim?

The SELCAL panel allows you to quickly see which aircraft within range have specified a SELCAL (SELective CALling) code in their flight plan remarks.

How do I request a SELCAL check?

The aircraft station should contact the appropriate aeronautical station and request a preflight 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 VDLM2?

Short Description. VDL-M2 (Known as VDL2 or VDLM2) is a means of sending information between aircraft and ground stations. VDL Mode 2 is the only VDL mode being implemented operationally to support Controller Pilot Data Link Communications (CPDLC).

What is CPDLC ATN?

ATN-B1 controller pilot datalink communication (CPDLC) is the new name for the former European Link 2000+ system, and it is the infrastructure created to facilitate airborne datalink messaging between aircraft and air traffic control (ATC).