RNP 10 based 50NM longitudinal separation may be applied to aircraft which are approved for RNP 10 operation on ATS route segments as follow :

   Operating restrictions applicable within Bangkok FIR are detailed in paragraphs below.

  ATC will apply 50 NM longitudinal separation minima between suitably equipped aircraft which are approved for RNP 10 operations on those segments of the routes which fall within the Bangkok FIR for flight intending to operate on the routes listed above in paragraph 2.1

  Controller-Pilot Data Link Communications (CPDLC) will be used as primary means of fulfilling Direct Controller-Pilot Communications (DCPC) requirement for providing 50 NM longitudinal separation between RNP 10 aircraft on those ATS Route.

  Therefore, CPDLC equipage will be required in order to provide 50 NM longitudinal separation on route segments in paragraph 2.1.1 for flight transitting YGN FIR

  Flight intending to land within YGN FIR, CPDLC will not be required

  Pilots are to advise ATC of any deterioration or failure of navigation system below the navigation requirements for RNP 10 or unavailability of CPDLC. ATC shall then provide alternate separation and/or alternative routing.

  Pilots of aircraft meeting RNP 10 navigation requirements are to indicate “/R” in Item 10 of the ICAO Flight Plan

  Aircraft are recommended to indicate CPDLC equipage in Item 18 of the ICAO flight plan.

  80 NM RNAV or 10 minutes (or less) Mach Number Technique (MNT) separation minima may be applied between aircraft.

  50 NM longitudinal separation may be applied between RNP 10 approved aircraft utilizing CPDLC or VHF communications.

  Non-RNP 10 approved aircraft must file flight plan at FL270 or below. Operations above FL270 for these aircraft will be subject to ATC approval, in accordance with the following provisions.

  ATC units receiving a request for a non-RNP 10 approved aircraft to operate on ATS routes specified in paragraph 2.1, at or above FL280, will co-ordinate with adjacent ATC units affected by the flight. In deciding whether or not to approve the flight each ATC unit will take into consideration:

1. Traffic density;

2. Communications, including the non-availability of normal communication facilities;

3. Weather conditions en- route; and

4. Any other factors pertinent at the time

  Monitoring of aircraft navigation performance is a joint responsibility between operators, States of Registry or States of Operators (as applicable), regulatory authorities and the ATS providers.

  The State and aircraft operator shall follow the procedures laid out in the ICAO Asia Pacific En-route Monitoring Agency Handbook for submission of navigation errors.

  The operator shall ensure that in-flight procedures, crew manuals and training program are established in accordance with RNP 10 navigation requirements.

  The operator may choose to initiate CPDLC communications with Yangon ACC (VYYF) within sufficient time before entering the Yangon FIR.