Aircraft Operations. Volume II - Construction of Visual and Instrument ...

Chapter 7
RNP
7.1 EQUIPMENT REQUIREMENTS
Area navigation systems which use the procedure must be controlled through a navigation database.
7.2 FIX TOLERANCE AREAS
It is assumed that the entire RNP 95 per cent error distribution is contained within a circle of radius equal to the RNP
value. Fix tolerance areas are defined by circles with radius equal to the RNP value.
7.3 FLIGHT TECHNICAL TOLERANCE
It is assumed the system provides information which the pilot monitors and uses to intervene and thus limit excursions
of the flight technical error (FTE) to values within those taken into account during the system certification process.
7.4 RNP VALUES
7.4.1 The four basic parameters used to define the total system performance requirements are accuracy, integrity,
continuity and availability. However, the values included after the term RNP in this chapter provide only the accuracy
parameter (expressed in nautical miles).
7.4.2 Departure procedures are normally based on RNP 1. Where necessary and appropriate, they may be based
on RNP 0.5 or RNP 0.3. Departures are not associated with an RNP less than RNP 0.3.
7.4.3 Non-precision approach procedures are normally based on:
a) RNP 0.5 (initial approach only); or
b) RNP 0.3 (initial, intermediate, final approach).
Non-precision approach procedures are not associated with an RNP less than RNP 0.3.
7.4.4 En-route procedures are normally based on RNP 4 or higher. Where necessary and appropriate, they may be
based on RNP 1.
III-1-7-1 23/11/06