Document ID: chunk:federal_register_of_legislation:F2025C00187:reg:5:p2
Version: federal_register_of_legislation:F2025C00187
Segment Type: reg
Provision Reference: reg 5 (pt 2/9)
Character Range: 154651–157331

ensure that ATS is notified of the situation as soon as practicable.
       (2) Before the departure of a flight planned to operate in oceanic airspace using GNSS, the pilot in command must obtain a prediction for GNSS FDE availability for the intended route.
       (3) For subsection (2), the pilot in command must plan so that the maximum predicted duration of the loss of GNSS FDE availability is not more than:
(a) for an RNP-4 operation — 25 minutes; or
(b) for an RNP-10 operation — 34 minutes.
       (4) The pilot in command of an aircraft whose approved GNSS can achieve LNAV accuracy of less than 0.3 NM using requisite GNSS satellites may disregard subsections (2) and (3).
Note   Requisite GNSS satellites is defined in section 1.07.

11.04 Loss of GNSS integrity
       (1) This section applies to a flight in any class of airspace, whether controlled or uncontrolled:
(a) that is within an Australian FIR; and
(b) for which the flight is:
           (i) required to maintain regular contact with an ATS; or
           (ii) being provided with a separation service by an ATS.
Note   Regulation 91.630 requires certain flights to make regular reports or broadcasts to an ATS. Regulation 91.635 requires certain flights to continuously monitor the primary communications medium used by ATC in controlled airspace.
       (2) The pilot in command of an aircraft must advise ATS if any of the following occurs:
(a) during an en route phase of flight — there is RAIM loss or loss of GNSS integrity for more than 5 minutes;
(b) during a terminal phase of flight — there is RAIM loss or loss of GNSS integrity;
(c) when ATS requests the provision of GNSS-derived information — RAIM or GNSS integrity is not available;
(d) when ATS grants a clearance or imposes a requirement based on GNSS-derived information — RAIM or GNSS integrity is not available;
(e) the GNSS receiver is in dead-reckoning mode, or experiences loss of its navigation function, for more than 1 minute.
       (3) If a pilot has notified ATS of a RAIM loss or loss of GNSS integrity in accordance with subsection (2), the pilot must notify ATS when RAIM or GNSS integrity is restored.

11.05 Use and supply of distance information
       (1) This section applies to a flight using any class of airspace, whether controlled or uncontrolled, that is within an Australian FIR.
       (2) When supplying distance information requested by the ATS, the pilot in command must be satisfied that ATS is aware of the source and the point of reference of the distance measurement.
Note   Here are examples of source and the point of reference: 115 GNSS ML VOR, 80 GNSS CTM NDB, 267 GNSS BEEZA 86 DME BN.
       (3)