area navigation (RNAV) X specificationmeans a navigation specification based on area navigation that does not include the requirement for on-board performance monitoring and alerting, whereby ‘X’ refers to the lateral navigation accuracy in nautical miles;
conventional navigation proceduresmeans ATS routes and instrument approach procedures predicated on the use of ground-based navigation aids that do not enable compliance with the PBN requirements set out in this Regulation;
instrument approach proceduremeans instrument approach procedure as defined in Article 2(90) of Implementing Regulation (EU) No 923/2012;
instrument runwaymeans instrument runway as defined in Annex I, point 22 of Commission Regulation (EU) No 139/2014;
navigation functionalitymeans the detailed capability of the navigation system required to meet the needs of the proposed operations in the airspace.
navigation specificationmeans a set of requirements for aircraft and aircrew needed to support performance-based navigation operations within a defined airspace;
performance based navigation (PBN)means performance based navigation as defined in Article 2(5) of Regulation (EU) No 965/2012;
radius to fix (RF)means a constant radius circular path about a defined turn centre that terminates at a fixed point;
required navigation performance (RNP) X specificationmeans a navigation specification based on area navigation that includes the requirement for on-board performance monitoring and alerting, whereby ‘X’ refers to the lateral navigation accuracy in nautical miles or the operation type and required functionalities;
satellite-based augmentation system (SBAS)means a wide-coverage augmentation system in which the user of a GNSS receives augmentation information from a satellite-based transmitter;
standard instrument arrival (STAR) routemeans a designated instrument flight rule arrival route linking a significant point, normally on an air traffic service (ATS) route, with a point at which a published instrument approach procedure can be commenced;
standard instrument departure (SID) routemeans a designated instrument flight rule departure route linking the aerodrome with a specified significant point, normally on a designated ATS route, at which the en route phase of a flight commences;