COM

The concept of call sign confusion and particularly the use of alphanumeric call signs are investigated by IFATCA. IFATCA Policy is: To reduce the possibility of call sign confusion: Call signs that correspond to the last two designators of both … Continued

The introduction of 8.33 kHz can have a major impact on the ATC system. There is the possibility of non-equipped aircraft entering 8.33 kHz, with the increased possibility of frequency blocking, and the additional workload placed on controllers both around … Continued

Some radios have a sleep mode that causes communication failures without being noticed. This results in serious security and cost issues for the military. Radio communication failure is a rare occurrence, but it can result in undesirable situations. Present ICAO … Continued

Other means of communication such as Controller to Pilot Datalink Communications (CPDLC) may present challenges if used in airspace with many time-critical clearances and communications. The current systems are too limited to deal with environments in which the majority of … Continued

The blocking of frequencies by inadvertent transmissions is a very real operational problem. A flight deck based technical solution has now been developed but implementation is very limited. IFATCA Policy is: Any device designed to prevent inadvertent transmissions from blocking … Continued

As data link becomes an important means of delivering ATS, there are crucial questions that shall be answered before this technology is used for safety-critical communications. This need is especially true where a data link communications system is the primary, … Continued

Airlines growing use of VHF Data Link Mode 2 (VDL2) has offered a reliable sub network for CPDLC. Future Air Navigations System (FANS-1/A+) has removed the risk of “out-of-date” messages and Aeronautical Telecommunications Network (ATN) Protected Mode CPDLC has eliminated … Continued

In the interests of safety and knowledge that everyone can understand exactly what is being asked of them it is important for military aircrew and civil controllers to be sure of others’ intentions. This is particularly true when the military … Continued

Different ways of communication are possible between adjacent ATS Units. Different methods of voice communication, data exchange and coordination between neighbouring ATS units may create challenges in different regions as well as conflicts that may arise related to this subject. … Continued

Pronunciation of letters has been standardized but there is a lack of uniformity across the world regarding the pronunciation of waypoints. Specifically, these relate to the confusion over the route designator and accurate identification of the correct 5LNC. iCARD is … Continued