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Post:

Civil Aviation Authority of Viet Nam
Air Navigation Department
119 Nguyen Son Street,
Long Bien District
Ha Noi, Viet Nam

Telephone:  +84 24 38274191

Fax:  +84 24 38274194

Email:  and@caa.gov.vn

Web:  http://caa.gov.vn

AIP Supplement for VIET NAM

AIRAC AIP SUP

33/23

Effective from 05 OCT 2023

to PERM

Published on 24 AUG 2023

  ESTABLISHMENT OF OPERATIONAL PROCEDURES FOR RNP 1 AND RNP APCH AT CA MAU AERODROME

1 — INTRODUCTION

This section supplements the following portion(s) of the AIP: AD.

This AIRAC AIP Supplement aims at notifying the establishment of operational procedures for RNP 1 and RNP APCH at Ca Mau Aerodrome (VVCM).

2 — DETAILS

2.1  General

  1. In order to agree with the operation of RNP 1 SID/STAR and RNP APCH procedures at Ca Mau Aerodrome, the aircraft navigation systems shall meet ICAO RNP 1 and RNP APCH accurate standard based on global navigation satellite system (GNSS) navigation infrastructure.

  2. Pilots, Air traffic controller (ATC) and the related personnel are responsible for checking RAIM Prediction in accordance with operational procedure for RAIM Prediction Service.

  3. Aircraft operators/pilots not authorized to fly RNP 1 SID/STAR and RNP APCH procedures based on GNSS shall inform ATC and expect to use the conventional procedures in accordance with actual conditions.

2.2  Operational procedures

  1. Aircraft operators/pilots expecting to use RNP 1 SID/STAR and RNP APCH procedures at Ca Mau Aerodrome shall fill appropriate navigation capability indicators in flight plan (FPL), as follows:

    1. Insert R (PBN approved) into Item 10a.

    2. Insert O1 (RNP 1 all permitted sensors) or O2 (RNP 1 GNSS), insert S1 (RNP APCH) or S2 (RNP APCH with BARO-VNAV) after PBN/ in Item 18.

    3. Specify equipment to support each type of navigation capability in Item 18 and insert them into Item 10a (G, D, I for O1 or G for O2, S1 and S2).

  2. Before implementation of flights, pilots must verify that the navigation database is updated to current time and the aircraft position has been entered correctly. Pilots must confirm the entry and exit points on the ATS route assigned on initial clearance and any subsequent changes of route, ensuring the waypoints sequence depicted by their navigation system matches the route depicted on the appropriate chart(s) and their assigned route.

  3. Pilots are only allowed to implement the procedure RNP 1 SID/STAR and RNP APCH procedures when it is capable to retrieve by procedures from the onboard navigation database and comply the charted procedure (this procedure may subsequently be modified in response to ATC clearances). Pilots are not allowed to entry or create manually of new waypoints by inserting latitude/longitude or rho/theta values is not permitted. Additionally, pilots are not allowed to change any RNP 1 SID/STAR and RNP APCH database waypoint type from a fly-by waypoint to a fly-over waypoint or vice versa.

  4. Pilots shall comply with altitude assigned by ATC, as well as adhere to the altitude and speed restrictions depicted on the cleared RNP 1 SID/STAR and RNP APCH procedures. ATC clearance will take precedence if that clearance does not allow the pilots to adhere to the altitude and speed restrictions depicted on the procedures.

  5. In case, ATC assigns the aircraft not to conduct the expected procedure, the pilots should not modify the flight plan in the system until a clearance to rejoin the procedure is received or the ATC confirms a new procedure clearance.

  6. During the operation of the RNP 1 SID/STAR and RNP APCH procedures, ATC and pilots apply the standard phraseology specified in DOC 4444 - PANS - ATM - ICAO, Procedures For Air Navigation Services – Air Traffic Management.

2.2.1  For departing aircraft

  1. Altitude restrictions are designed to establish the separation between departing aircraft and obstacles as well as arriving aircraft.

  2. ATC shall issue a clearance for departing aircraft including the following contents:

    1. Call sign;

    2. Clearance limit, normally destination aerodrome;

    3. SID;

    4. Route;

    5. Assigned flight level/altitude;

    6. SSR code; and

    7. Any other related and necessary instruction or information not contained in the SID description.

Note: In case, a clearance provided SID is not assigned altitude/flight level, the pilots are not allowed to reach the altitude/flight level itself on the SID vertical profile. Pilots shall re-confirm with ATC to assign a specified altitude/flight level to ensure flight safety.

2.2.2  For arriving aircraft

  1. Altitude restrictions are designed to establish the separation between arriving aircraft to obstacles and departing aircraft.

  2. Clearances allowing the aircraft to conduct as approach procedure which shall be issued by ATC in accordance with actual operating conditions.

  3. ATC shall issue clearance for arriving aircraft including the following contents:

    1. Call sign;

    2. STAR;

    3. Runway-in-use;

    4. Assigned flight level/altitude;

    5. Any other related and necessary instruction or information not contained in the STAR description.

Note: In case, a STAR clearance is not assigned altitude/flight level, the pilots are not allowed to reduce the altitude/flight level itself on the STAR vertical profile. Pilot shall re-confirm with ATC to assign a specified altitude/flight level to ensure flight safety.

2.2.3  For approaching aircraft

  1. The procedures for approaching aircraft include 2 main elements:

    1. IAP; and

    2. Missed approach procedure.

  2. The approach procedure starts from an IAF to the THR or the missed approach holding in case aircraft must conduct the missed approach.

  3. Speed as well as altitude restrictions ensure the separation between approach aircraft and obstacle and ensure in compliance with aircraft performance.

  4. Clearances allowing the landing aircraft shall be issued by ATC appropriate to practical operating conditions.

  5. ATC shall issue clearance for approaching aircraft including the following contents:

    1. Call sign;

    2. IAP;

    3. Runway-in-use;

    4. Information of wind conditions, RWY surface conditions (if applicable);

    5. Any other related instructions or information not contained in the IAP description.

Note: In case, aircraft must conduct a missed approach, provide pilots with information relating to the missed approach procedure such as track, waypoint, estimated holding pattern.

2.3  Contingency procedures

2.3.1  Aircraft is unable to comply with RNP 1 or RNP APCH Requirements

If aircraft is unable to comply with RNP 1 or RNP APCH requirements, pilots shall inform ATC immediately and expect to be used the conventional procedure in accordance with actual conditions.

2.3.2  Aircraft degrade the RNP capability or failure of GNSS signal

When the aircraft degrade the RNP capability or fail in GNSS signal, which leads to the inability to comply with the requirements of RNP 1 or RNP APCH, pilots must advise ATC immediately and expect to be used the conventional procedure in accordance with actual conditions.

2.3.3  Aircraft experience bad weather

When the aircraft flying on RNP 1 or RNP APCH procedures encounters bad weather which is likely to impact the aircraft’s adherence to the cleared flight procedures, pilots will notify ATC and request revised clearance.

2.3.4  Radio communication failure procedure

In case of a radio communication failure, the pilots are expected to proceed the following procedures:

  1. Set transponder to Mode A/C, code 7600.

  2. For arriving aircraft: Continue flying on the assigned procedure, complying with the altitude and speed restrictions and at the end of the STAR, join the holding pattern at IAF. Aircraft leaves holding pattern following the issued EAT that affirmed with ATC last time or if there is no EAT, apply the ETA in the current flight plan and conduct the approach procedure assigned by ATC

  3. For departing aircraft: Continue flying on the procedure complying with the altitude and speed restrictions, climb to cruising level as mentioned in the current flight plan.

2.3.5  Procedure for changing runway-in-use

  1. ATC shall assign time to conduct the change of the runway-in-use, determine aircraft sequence corresponding to the runway-in-use to notify and issue the assigned clearance for RNP 1 SID/STAR and RNP APCH procedures which are suitable for the pilots.

  2. In case of necessity, ATS surveillance vectoring may be used by ATC to deal with complicated situations.

3 — EFFECT

This AIRAC AIP Supplement shall become effective from 0000 on 5 OCT 2023.

4 — CANCELLATION

This AIRAC AIP Supplement shall remain in force until its content has been incorporated into Viet Nam AIP.