Document ID: chunk:federal_register_of_legislation:F2018C00889:reg:5:p10
Version: federal_register_of_legislation:F2018C00889
Segment Type: reg
Provision Reference: reg 5 (pt 10/51)
Character Range: 51185–53969

not exceed the specified navigation accuracy.
       7.5 Brief deviations from the standard mentioned in subclause 8.4 are acceptable during and immediately after turns, but only to the minimal extent that accurate cross‑track information may not be provided during the turn. Unless emergency conditions exist, any other intentional deviation from the route centreline requires prior clearance from ATC.
Note   Flight crew procedures and training should emphasise observance of turn anticipation commands and management of rate of turn.
       7.6 If ATC issues a heading assignment taking the aircraft off a route, the navigation system flight plan may only be modified when:
(a) ATC clearance is received to rejoin the route; or
(b) ATC confirms a new clearance.

8 Contingency procedures for performance failure
       8.1 If the system performance ceases to meet RNAV 5 requirements during an RNAV 5 operation in controlled airspace, ATC must be notified immediately.
       8.2 Where stand-alone GNSS or GNSS/FMS equipment is used for an RNAV 5 operation and a loss of the integrity monitoring function occurs, the following checks and procedures must be followed:
(a) while continuing to navigate using GNSS — cross-check the aircraft position with other sources of position information, for example, VOR, DME and NDB information, to confirm an acceptable level of navigation performance;
(b) if unable to confirm navigation accuracy — revert to an alternative means of navigation and advise ATC accordingly.
       8.3 If:
(a) stand-alone GNSS or GNSS/FMS equipment is used for an RNAV 5 operation; and
(b) a navigation display is flagged invalid due to an integrity alert;
       the aircraft must:
(c) revert to an alternative means of navigation; and
(d) ATC must be advised accordingly.
Appendix 2 – Requirements for use of RNAV 1 and RNAV 2

1 RNAV 1 and RNAV 2 eligibility for I.F.R. flights
      1.1 RNAV 1 and RNAV 2 may only be used for PBN by an aircraft if the aircraft meets the requirements for RNAV 1 and RNAV 2 as set out in this Appendix.
Note   Air routes may be designed to support RNAV 1 or RNAV 2 depending on the supporting navaid infrastructure. In Australia, as the navaid infrastructure is limited, RNAV 1 and RNAV 2 operations are dependent on self-contained navigation systems.
       1.2RNAV 1 and RNAV 2 requirements are identical, however, some operating procedures may be different.
Note   In Australian airspace, RNAV 1 will be used only in terminal area operations and RNAV 2 routes or procedures will not be used.
     1.3 RNAV 1 and RNAV 2 may be used by an aircraft:
           (a) if it meets the aircraft eligibility requirements for use of RNP 1 or RNP 2; or
           (b) the operator has been issued with, or is deemed to hold, an RNAV