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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

30/23

Effective from 07 SEP 2023

to PERM

Published on 27 JUL 2023

  IMPLEMENTATION OF WAKE TURBULENCE SEPARATION MINIMA AT NOI BAI, DA NANG, TAN SON NHAT TMA

1 — INTRODUCTION

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

In order to enhance efficiency of RWY, terminal airspace of Noi Bai, Da Nang, Tan Son Nhat Aerodrome, on 24 MAY 2023, AIP supplement A18/23 was published to provide information about the implementation of wake turbulence separation minima at Noi Bai TMA. Applicated from 0000 on 15 JUN 2023. This AIRAC AIP Supplement aims at notifying the implementation of wake turbulence separation minima (based on distance and time) between aircraft at Noi Bai, Da Nang, Tan Son Nhat TMA.

Applicable time: From 0000 on 7 SEP 2023

2 — DETAILS

2.1  Wake turbulence categories according to the maximum certificated take-off mass as follows:

According to Amendment 9 ICAO DOC 4444 (PANS-ATM), wake turbulence categories included for 4 types, as follows:

  1. SUPER (J) - aircraft types (large weight equivalent to aircraft A380), specified as such in DOC 8643.

  2. HEAVY (H) - aircraft types of 136 000 kg or more, with the exception of aircraft types listed in DOC 8643 in the SUPER (J) category.

  3. MEDIUM (M) - aircraft types less than 136 000 kg but more than 7 000 kg.

  4. LIGHT (L) - aircraft types of 7 000 kg or less.

2.2  Application of wake turbulence separation

Wake turbulence separation shall be applied when:

  1. An aircraft is operating directly behind another aircraft at the same altitude or less than 300 m (1 000 ft) below; or

  2. Both aircraft are using the same runway, or parallel runways separated by less than 760 m (2 500 ft); or

  3. An aircraft is crossing behind another aircraft, at the same altitude or less than 300 m (1 000 ft) below.

2.2.1  In case aircraft are being provided with an ATS surveillance service in the approach and departure phases of flight, the following distance-based wake turbulence separation minima are applied:


Note: Separation between wake turbulence categories are not belong to ICAO recommended at Chapter 8, Item 8.7.3.4, DOC 4444 (the cells marked in bold in table above) are applied minimum ATS surveillance standard of 3 NM.

2.2.2  In case aircraft are not being provided with an ATS surveillance service in the approach and departure phases of flight, the following time-based wake turbulence separation minima are applied:

Wake turbulence categories

Time-based wake turbulence separation minima

Preceding aircraft Succeeding aircraft For landing aircraft For take-off aircraft (from the beginning of RWY) For take-off aircraft (from the intersection of RWY and TWY)
SUPER HEAVY 2 minutes 2 minutes 3 minutes
MEDIUM 3 minutes 3 minutes 4 minutes
LIGHT 4 minutes 3 minutes 4 minutes
HEAVY MEDIUM 2 minutes 2 minutes 3 minutes
LIGHT 3 minutes 2 minutes 3 minutes
MEDIUM LIGHT 3 minutes 2 minutes 3 minutes

2.3  Additional information for airlines and/or pilots

2.3.1  Flight planning

Airlines, aircraft operators and/or pilots are to continue to Indicate the wake turbulence category of the aircraft (e.g: J, H, M, L).

2.3.2  Radio telephony

For aircraft in the SUPER or HEAVY wake turbulence categories, the word “SUPER” or “HEAVY” shall continue to be included, as appropriate, immediately after the aircraft call sign in the initial radio telephony contact between pilot and ATC.

2.3.3  Speed control

Accordance with the provisions of speed control within Noi Bai, Da Nang, Tan Son Nhat TMA have been published in Viet Nam AIP; complying with the ATC clearances and inform ATC immediately if unable to follow the speed restrictions are issued.

2.3.4  Runway occupancy

Pilots must concentrate on observing, strictly complying and implementing ATC clearances fully and in a timely manner to reduce RWY occupation time.

  1. For departure aircraft:

    1. Pilots shall be ready for take-off; ensure that aircraft shall be held on the assigned holding point as requested by ATC.

    2. Expedite to carry out the line up RWY and take-off clearances are issued.

      Note: Line up RWY clearance is not take-off clearance.

    3. Pilots shall ensure that aircraft start rolling for take-off within 30 seconds after receiving take-off clearance (if the aircraft is unable to do so, pilots shall inform Noi Bai, Da Nang, Tan Son Nhat TMA immediately).

  2. For landing aircraft: Pilots expedite to vacate RWYs (ensure that the tail of the aircraft vacating the holding point marking) within 60 seconds after deceleration. If the aircraft is unable to do so, pilots shall inform Noi Bai, Da Nang, Tan Son Nhat TMA immediately.

3 — EFFECT

Any change relating to the contents of this AIRAC AIP Supplement shall be notified by NOTAM.

4 — CANCELLATION

This AIRAC AIP Supplement shall replace AIP SUP A18/23 and remain in force until its information has been incorporated into the Viet Nam AIP.