ATS |

ATS 3.12 MIXED MODE OPERATIONS

The ATM system will continue to evolve through the use of technology. To permit certain categories of non-equipped flights to operate in mandatory equipage airspace, exemptions are given. The controller is often used as the mitigation to permit these flights … Continued

ATS 3.28 CONTROLLED TIME OF ARRIVAL CONCEPT

The RTA function enables an aircraft to pass a waypoint at a predefined time. The CTA concept uses this capability in sequencing arriving traffic to the Terminal Area (TMA) by assigning such fix times to aircraft. CTA and RTA are … Continued

ATS 3.42 HELICOPTER OPERATIONS

The integration of fixed wing aircraft and helicopters on an airfield can present considerable difficulties to airfield ATC. IFATCA Policy is: Procedures should be developed in order to integrate fixed and rotary-winged operations at airfields. In developing these procedures cognisance … Continued

ATS 3.13 VIRTUAL CENTERS AND FUNCTIONAL AIRSPACE BLOCKS

The worldwide patchwork of FIRs and associated ANSPs is a cause of operational and organisational inefficiencies. In Europe, where the problem is most pronounced due to the large number of states and flights, functional airspace blocks (FABs) were envisaged as … Continued

ATS 3.29 MERGING AND SEQUENCING CONCEPTS

Due to environmental, economical and operational reasons the need for more accurate merging and sequencing tools has arisen. IFATCA Policy is: IFATCA encourages the development of sequencing and merging tools provided that: They provide controllers with reliable and effective information. … Continued

ATS 3.44 HELICOPTER RTF PHRASEOLOGY

It is often normal practice on airfields for helicopters to take off and land from parts of the apron area. However, these areas, not being part of the manoeuvring area, are not under the control of ATC and there may … Continued

ATS 3.14 SYSTEM DEFENCES DURING PLANNED SYSTEM DEGRADATION

Planned System Degradation could be any potential reduction in the availability, reliability or integrity of any part of the ATM system, known in advance to the user of the system. IFATCA Policy is: Risk assessment and appropriate mitigation should be … Continued

ATS 3.30 TRANSPONDER MANDATORY ZONES

Transponder Mandatory Zones (TMZ), defined areas in which the carriage of an operational transponder is required, have been implemented in several states to improve safety. IFATCA Policy is: All aircraft operating as IFR flights shall be equipped with a pressure-altitude … Continued

ATS 3.43 HELICOPTERS: DISCRETE IDENTIFICATION IN FLIGHT PLANS

There is no provision on the present flight plan form to differentiate a helicopter from a fixed wing aircraft, unless the type designator gives the information in order to prevent uncertainty. IFATCA Policy is: Procedures should be developed for Flight … Continued

ATS 3.15 (ADVANCED) STRATEGIC LATERAL OFFSET PROCEDURES

Strategic Lateral Offset Procedures (SLOP) are mitigating the risk of vertical collision and wake turbulence encounters between aircraft with high precision navigation capabilities. Provisions of SLOP are published in ICAO Doc 4444 (PANS-ATM) as special procedures for oceanic and remote … Continued