AAS |

AAS 1.1 AIRBORNE COLLISION AVOIDANCE SYSTEMS (ACAS)

IFATCA Policy is: IFATCA fully supports and encourages the development and operation of airborne anti- collision systems. The primary means of collision avoidance for flights for which a separation service is set-up shall be the air traffic control system. This … Continued

AAS 1.2 AUTOMATIC DEPENDENT SURVEILLANCE (ADS)

IFATCA Policy is: Before an ADS service is introduced into operational service, the necessary system components to provide a control service and to support the control task shall be in place. Only pertinent and useful flight data should be … Continued

AAS 1.3 MODE S DEVELOPMENT

Mode S has been established by ICAO as the standard for SSR surveillance due to those performance and functional limitations of the present system which are becoming increasingly significant. Whilst the initial implementation emphasis is on surveillance, Mode S also … Continued

AAS 1.4 REQUIRED NAVIGATION PERFORMANCE (RNP) and AREA NAVIGATION (RNAV)

Area Navigation (RNAV) is defined as a method of navigation which permits aircraft operation on any desired flight path within the coverage of station-referenced navigation aids or within the limits of the capability of self contained aids, or a combination … Continued

AAS 1.5 AIR-GROUND DATALINK

The use of air ground Datalink systems has a significant part to play in the evolution of air Traffic Management (ATM), particularly in terms of communication and surveillance. This policy concentrates on the communication aspect. Large quantities of information are … Continued

AAS 1.6 DATALINK APPLICATIONS – THE USE OF LOGICAL ACKNOWLEDGEMENT (LACK)

There are situations present within the ATN CPDLC SARPs in which the use of LACKs is necessary to have the system perform in an operationally acceptable way. However, the deployment of such systems as FANS 1/A does not utilise this … Continued

AAS 1.7 DISPLAY OF GNSS STATUS TO ATC

When any failure to the GNSS occurs, it is to be expected that some aircraft will fail to meet the RNP and require special action to be taken, while others will be able to continue to meet the RNP. It … Continued

AAS 1.8 4D TRAJECTORY CONCEPTS/MANAGEMENT

IFATCA Policy is: Implementation of 4D trajectory management requires appropriately designed airspace. See: Resolution B8, B9 – WP 91 – Toronto 2017, Resolution B7 – WP58 – Virtual 2022 See also: WP 86 – Arusha 2008

AAS 1.9 REMOVAL OF GROUND BASED AIDS

The implementation of GNSS is precipitating the removal of certain ground based navigation aids. IFATCA is concerned that as these GNSS systems are subject to natural temporary degradation and unserviceabilities that there should not be a reliance on a sole … Continued

AAS 1.10 OPERATIONAL USE OF UNMANNED AIRCRAFT (UA)

ATC should not have to apply different rules or work with different criteria in order to handle UA. From the air traffic controller’s perspective, the provision of ATS to an UA shall be transparent. This includes all stages of the … Continued