Document ID: chunk:federal_register_of_legislation:F2005L04061:body:0:p26
Version: federal_register_of_legislation:F2005L04061
Segment Type: other
Provision Reference: 
Character Range: 68220–71294

any differences between the selected earth model and the WGS-84 earth model form part of the path definition error. Errors induced by data resolution also form part of the considerations.

Section 4.4 Operational requirements for CASR 91.5010

4.4.1 Navigation equipage

       4.4.1.1The minimum navigation equipage for RNP 4 operations in oceanic or remote airspace is 2 fully serviceable independent LRNSs, with integrity such that the navigation system does not provide misleading information.

       4.4.1.2For aircraft incorporating GNSS, FAA Advisory Circular AC 20-138 or equivalent documents provide an acceptable means of complying with installation requirements for aircraft that use but do not integrate the GNSS output with that of other sensors.

Note   FAA AC 20-130A describes an acceptable means of compliance for multi-sensor navigation systems that incorporate GNSS.

       4.4.1.3The equipment configuration used to demonstrate the required accuracy must be identical to the configuration specified in the MEL or AFM.

       4.4.1.4The design of the installation must comply with the design standards that are applicable to the aircraft being modified and changes are to be reflected in the flight manual before commencing operations requiring an RNP 4 navigation approval.

4.4.2 Flight plan designation

       4.4.2.1The method of indicating that an operator is approved to undertake RNP 4 operations is to have the letter 'R' written in Item 10 (Equipment) of the ICAO flight plan.

       4.4.2.2The method to be used to indicate the RNP type (RNP 4) is set out in the relevant State AIPs.

       4.4.2.3The insertion of the letter "R" indicates that the pilot has:

(a) reviewed the planned route of flight, including the routes to any alternate aerodromes, to identify the types of RNP involved; and

(b) confirmed that the aircraft and the operator have been authorised by CASA for RNP 4 operations; and

(c) confirmed that the aircraft can comply with all conditions of the approval for the planned route of flight, within airspace or on routes requiring RNP 4.

4.4.3 Availability of GNSS

       4.4.3.1Before the commencement of a flight, the operator must ensure that the GNSS availability requirements, on which the operator's approval is based, will be met for the whole of the flight.

4.4.4 Navigation database

       4.4.4.1The standards for navigation databases are set out in RTCA document DO-200A and EUROCAE document DO-76.

       4.4.4.2An operator who uses a navigation database supplier that does not meet these standards must implement navigation database integrity checks using appropriate software tools or approved manual procedures to verify data relating to all waypoints in RNP 4 airspace or routes. These checks are in addition to any checks performed by the Aeronautical Information Services, unapproved navigation database suppliers or navigation equipment manufacturers.

       4.4.4.3The integrity checks must identify any discrepancies between the navigation database and the published charts and procedures.