Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:22:p25
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 22 (pt 25/26)
Character Range: 234114–237230

from the NDB.
       6.4.4RAIM or other approved integrity monitor must be available during these operations.
       Equipment requirements
       6.5.1Operators conducting regular passenger transport, or charter, operations must be equipped with at least 1 other independent navigation system in addition to the installed and operative GNSS-based area navigation system.
       6.5.2This additional system must be suitable for the intended route so that, in the event of an area navigation system failing, the aircraft is capable of proceeding safely to an aerodrome and completing an instrument approach. For example:
(a) for an aircraft equipped with (E)TSO- C145 ( ), (E)TSO-C146 ( ) or (E)TSO-C196 ( ) GNSS-based area navigation systems, an acceptable installation requires dual GNSS but no additional navigation equipment is required; and
(b) an aircraft equipped with (E)TSO-C129 GNSS-based area navigation systems requires operative VOR and/or ADF navigation equipment suitable for the intended en route, terminal, and approach operations, including any alternates.
       6.5.3ADF equipment need not be installed and operative, although operators of aircraft without an ADF will be bound by the operational requirements defined in this Appendix and may not have access to some procedures (that is, there may be instances when some operations might not be conducted without ADF equipment).
       6.5.4Use of an area navigation system as a substitute means of navigation may be applicable to normal in-flight use, to continuation of flight after failure, or to dispatch with inoperative conventional capability if consistent with the applicable MMEL for the aircraft type and an applicable CASA approved operator's MEL.
       Alternate aerodrome requirements
       6.6 For the purposes of flight planning, any required alternate aerodrome must have an available instrument approach procedure that meets the requirements of this Appendix for the equipment installed in the aircraft.
       6.7 For aircraft equipped with (E)TSO-C129 ( ) GNSS systems, the alternate aerodrome must have a non-GNSS approach procedure available and the aircraft must have the requisite equipment installed and operative.
       6.8 For aircraft equipped with (E)TSO-C145 ( ), (E)TSO-146 ( ) or (E)TSO‑196 ( ) equipment, the approach procedures at an alternate aerodrome may be GNSS based.

7 GNSS requirements
       7.1 GNSS-based area navigation systems may be used as an alternate means of navigation without restriction providing the aircraft is fitted with the equipment for the underlying navigation aid, the system is operative and the ground-based navigation aid is operative.
       7.2 As part of flight planning, a prediction for GNSS integrity availability must be obtained where GNSS will be used as a substitute or alternate means of navigation.
Notes to Civil Aviation Order 20.91 (Instructions and directions for performance‑based navigation) Instrument 2014
The Civil Aviation Order (in force under the Civil Aviation Regulations 1988, the Civil Aviation Safety Regulations 1998 and the Acts Interpretation Act