When considering system changes it is necessary to assess their impact on the entire ATC operational environment, and to endorse that the introduction of such changes into one air traffic system does not adversely affect, not only that system, but also any interfacing systems where changes have not been introduced.
IFATCA Policy is:Only aircraft capable of meeting the Minimum Aircraft Systems Performance Specifications (MASPS) upon which reduced separation is dependent be shall be permitted to operate in areas where reduced vertical separation is in effect. State aircraft should only be accepted when appropriate procedures have been evaluated and validated, and controllers are trained in the operation of a mixed-traffic environment. If non MASPS (e.g. military) State aircraft are required to operate in RVSM airspace then, in order to preserve system safety, their number should be kept to the absolute minimum. IFATCA is opposed to any exemptions for non-RVSM aircraft adding complexity or unduly increasing controller workload, except in coordinated contingency emergency situations. |
| See: WP 50 – Acapulco 1990, WP 115 – Tunis 1996, WP 83 – Toulouse 1998, WP 102 – Geneva 2001, Resolution B52 – WP 64 – Virtual 2022
See also: WP 102 – Christchurch 1993 |
Last Update: August 9, 2022