In the modern world of aviation there are a variety of different types of airspace that could possibly require protection. There are danger areas, restricted areas, special use areas, prohibited areas, temporary reserved areas, military areas and other locally defined special airspace areas to name a few. All of these have different entry and operational requirements but from an ATS perspective these requirements are immaterial. The airspace will have been established for a specific purpose and there will be a requirement to either keep aircraft operations clear of such areas or at least advise a pilot of the imminent penetration of some types of airspace. For the purpose of this policy, all such airspaces referred to above shall be classified “as special use” airspace.
IFATCA Policy is:
An Area Proximity Warning (APW) is an alert provided to a controller of the imminent incursion of a flight into “special-use” airspace.
Note – The response to such a warning will be dictated by the nature of the airspace in question and its specific requirements.
|See: WP 92 – Hong Kong 2004|
Last Update: October 2, 2020