2.1.1  Purpose

The implementation of the Multi-Node ATFM Level 3 Operating Procedures in Viet Nam aims to achieve harmonized and unified coordination among stakeholders for air traffic flow management in Viet Nam. This ensures compliance with Common Operating Procedures of AMNAC. Consequently, Viet Nam participation in AMNAC is significantly enhanced, facilitating seamless air traffic flow within Viet Nam and the broader region.

2.1.2  Scope

This document is applicable for all stakeholders involved in the Level 3 multi- nodal ATFM (indicative measure Calculated Take-Off Time (CTOT)) for aircraft operating at Noi Bai, Da Nang, Tan Son Nhat Aerodromes.

2.1.3  Applicable subject

1. Viet Nam Air Traffic Management Corporation (VATM): Viet Nam Air Traffic Flow Management Center, Northern Region Air Traffic Services Company, Middle Region Air Traffic Services Company, Southern Region Air Traffic Services Company, Viet Nam Aeronautical Information Centre, Aviation Meteorological Centre.

2. Airlines (Operation Control Centers; Airline representatives); Flight plan procedure support enterprise; Airports Corporation of Viet Nam (ACV); Van Don International Airport; other stakeholders participate in implementing this procedure.

2.1.4  Application condition

1. Viet Nam Air Traffic Management Corporation (VATM), Airports Corporation of Viet Nam (ACV), Airlines, Van Don International Airport, Flight plan procedure support enterprise shall ensure that relevant personnel understand the concept of ATFM operations and have a plan to support CTOT-enabled departures and coordinate with the Viet Nam Air Traffic Flow Management Center (ATFMC) for CTOT management.

2. Ensure the following equipment system: Computer with internet connection; AFTN/AMHS terminal; Phone; Email; FAX.

2.2.1  The departures to the following airports in Viet Nam will be applied CTOT issued by Viet Nam ATFMC:

1. Noi Bai International Airport (HAN/VVNB);

1. Da Nang International Airport (DAD/VVDN);

1. Tan Son Nhat International Airport (SGN/VVTS).

The application of ATFM measures, including CTOT, may be extended to other international airports in Viet Nam in the future.

2.2.2  Airlines responsibilities

2.2.3  EXEMPTION OF FLIGHTS FROM ATFM MEASURES

The following flights may be exempted from applying ATFM measures:

1. Flights experiencing an emergency, including aircraft subjected to unlawful interference;

2. Flights in search and rescue or fire-fighting missions;

3. VIP flights;

4. Urgent medical evacuation flights with patient at risk;

5. Other flights specifically identified by appropriate authorities.

2.3.1  Submit FPL and send ATS messages

Stakeholders shall submit the draft FPL and send ATS messages (DLA, CHG, CNL, DEP) according to the following regulations:

Step 1: Submit draft FPL and CHG/DLA/CNL information

Operations Control Center (Airlines of Viet Nam); airline representative (Foreign Airlines); Flight Plan Procedure Supporting Enterprises:

1. Make sure to submit the draft FPL to related ARO’s unit before 03 hour 30 before EOBT (except for operational or technical reasons);

2. Submit CHG/DLA when the EOBT deviates from the originally filed flight plan by 15 minutes or more and CNL message for flight cancellation to relevant ARO’s unit.

Step 2: Send FPL message and ATS messages

ARO Unit:

1. Send FPL at least 03 hours before EOBT;

2. Promptly transmit CHG/DLA messages to relevant parties upon receiving CHG/DLA information from airlines (do not send a EOBT revision message as the result of CTOT);

3. Send CNL message immediately upon receiving flight cancellation information from airlines;

4. Send DEP message according to applicable regulations.

2.3.2  Online CDM conference

ATFMC will host recurring online local CDM conferences with stakeholders every Thursday at 0200 UTC and cases when there are extreme weather conditions, or when there is other information effecting the receiving capacity of Level 3 AD.

2.3.3  CTOT delivery, receipt and compliance

a. Procedure for CTOT delivery and receipt

Step 1: The announcement of the intention to apply ATFM measures (CTOT)

ATFMC will announce the plan to implement ATFM measures (CTOT) through the release of ADP which will be distributed via email to stakeholders.

Information released in ADP includes the following:

1. Limitations and Impacts: Provides information about ATM resources with demand-capacity imbalances.

2. ATFM measures: provide information about ATFM measures applied to address the imbalance noted in the Limitations and Impacts section.

3. Related contents: provide information about possible situations affecting the operations of the air traffic controller or ATM capacity. This information is provided for situational awareness purposes.

In order to facilitate automated ADP processing, ADP is to be sent as a file attached to an email with the following specifications:

1. E-Mail Subject: ADP_[FIR Name]_[Effective Date, yyyyymmdd]_[Version number]

2. File Name: ADP_[FIR Name]_Effective Date, yyyymmdd]_[Version number]

   Example: ADP_VVNB_20241207_1

   See ATFM Daily Plan (ADP) Template and ATFM Alerts / Notification Message Templates for detail in Appendix 2 and Appendix 3 as follow link: https://tinyurl.com/atfm3

Step 2: Organization of online CDM conference

ATFMC will host an online CDM conference to clearly communicate information regarding the planned ATFM measures.

In cases where stakeholders are unable to participate in a specific online CDM conference, the ATFMC will send the conference outcomes to the relevant stakeholders.

Step 3: CTOT Generation and Dissemination

CTOT will be generated and disseminated to stakeholders by Viet Nam ATFMC through various channels at least 90 minutes before the EOBT of the associated flights. These channels may include web portal, AFTN/AMHS, telephone, or email to stakeholders.

Step 4: CTOT Receipt

Upon receiving a CTOT, stakeholders are responsible to confirm the receipt of the CTOT to Viet Nam ATFMC, Airline is responsible to inform the flight crew of their assigned CTOT to ensure flight planning and to comply with assigned CTOT.

See ATFM terminology used in GDP coordination and The ATFM terminology used in voice communication for detail in Appendix 4 as follow link: https://tinyurl.com/atfm3

b. CTOT Compliance Procedure:

Step 1: Determining CTOT compliance

Upon receiving a CTOT, stakeholders will assess their ability to comply. They will then notify Viet Nam ATFMC of their compliance status (compliant or non-compliant) via telephone or email.

Step 2: Cases where an aircraft can comply with CTOT

Upon receiving a CTOT, the airline will disseminate the assigned CTOT internally. Flight crews will request en-route clearances and push-back/start-up approvals, taking into account the taxi-out time to ensure adherence to the CTOT.

See CTOT compliance procedure for detail in Appendix 6 as follow link: https://tinyurl.com/atfm3

Step 3: CTOT Non-Compliance

1. Upon receiving a CTOT, if anticipating non-compliance with the CTOT, stakeholders are responsible for promptly notifying the ATFMC of the reason(s). Upon receiving a CTOT revision request, the ATFMC will recommend a new CTOT and notify stakeholders at least 30 minutes before this new CTOT.

2. Prior to engine start-up, if the flight crew anticipates non-compliance with the CTOT, they will notify the airline and request a CTOT change. The airline will then inform the ATFMC about the situation where the aircraft cannot comply with the CTOT, and request to change the CTOT (if possible).

3. In case the aircraft has started up and taxied but cannot comply with CTOT due to operation, technique, weather, etc. The related TWR must notify the ATFMC immediately. ATFMC makes changes to CTOT (if possible) or the related TWR handling according to actual situations (the aircraft not complying with CTOT may have to hold when landing at the arrival airport).

See Procedure of changing CTOT request for detail in Appendix 7 as follow link: https://tinyurl.com/atfm3

2.3.4  Revision/cancellation of CTOT

1. Revisions and cancellations of CTOT will be normally notified by Viet Nam ATFMU to stakeholders 45 minutes before the revised CTOT via web portal/email/ATFN/AMHS/Tel. However, in some exceptional circumstances, CTOT revision and cancellation may be notified after this time frame. Airline will base their decisions on the actual situation to determine the possibility of compliance/non-compliance with the revised CTOT.

2. Upon revised CTOT receipt, the airlines inform the flight crew about the revised CTOT. The flight crew must comply with CTOT (See Procedure of revising CTOT request for detail in Appendix 8 as follow link: https://tinyurl.com/atfm3)

3. Upon cancelled CTOT receipt, airline should acknowledge receipt of the information to Viet Nam ATFMU. Flight can then proceed under normal operations (See Procedure of cancelling CTOT request for detail in Appendix 9 as follow link: https://tinyurl.com/atfm3).

2.3.5  CTOT swapping

2.3.6  CTOT compliance management

Stakeholders coordinate in order that the flight have the capability of CTOT compliance in the time window as follows:

1. -5 /+10 minutes for designated CTOT in case the airport is restricted;

2. -5/+5 minutes for designated CTOT in case the airspace is restricted.

2.3.7  Post Analysis

Stakeholders are encouraged to contribute feedback and information on ATFM operations to the Post-Operations Analysis process and send it to the TFMC when there are special cases before the 5th of every month. This feedback will be used to evaluate the effectiveness of ATFM measures and identify areas for improvement.

See Post-Operation analysis report template for detail in Appendix 13 as follow link: https://tinyurl.com/atfm3).

Further information can be found at: https://tinyurl.com/atfm3

Communications

1. Post: Viet Nam Air Traffic Flow Management Center

2. Telephone/Fax: +84 24 32127893/ +84 24 38271513 ext 8643

3. Email: atfmu@vatm.vnWeb Portal: https://www.atfm.vn/atfmportal, https://ctot.atfm.vn

4. AFTN/AMHS: VVVVZDZX

5. Helpdesk: +84 24 32127893 (24/7 Operations)