The use of CPDLC is reserved for strategic clearances in this airspace and is conducted at the discretion of ATC. The following CPDLC services are provided in Maastricht UAC area of responsibility: This application includes a set of clearance/information/request message elements which correspond to the phraseologies used in the radiotelephony environment.ĬPDLC services are available for all certified aircraft operating within the upper airspace (above FL 245) of the Brussels UIR in the area under the responsibility of Maastricht UAC. ![]() The CPDLC application provides a means of communication between the air traffic controller and the pilot, using a predefined data link message set. Satellite based augmentation systems ( EGNOS)Īccording to the judgement of the direction-finding station, bearings are classified as follows: Class Aĭirection-finding stations have authority to refuse to give bearings or headings to steer when conditions are unsatisfactory or when bearings do not fall within the calibrated limits of the station, stating the reason at the time of refusal.Global navigation satellite core constellations ( GPS).UHF tactical air navigation aid (TACAN). ![]()
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