1. In controlled airspace, traffic information will be given when an identified controlled flight is observed to be on a conflicting path with an aircraft which ATC have no specific information deemed to constitute a collision hazard, a course of avoiding action will be suggested, if so requested by the pilot or if in the opinion of the radar controller the situation warrants.

2. When an identified IFR operating outside controlled airspace is observed to be on a conflicting path with another aircraft, the identified aircraft will be advised of the need for collision avoidance. If so requested by the pilot or if in the opinion of the radar controller the situation warrants, a course of avoiding action will be suggested.

3. In both cases mentioned in 3.3 the decision as to whether or not to comply with the ATC suggestion rests solely with the pilot.

4. Whenever suggestion to assist the pilot for avoiding action is given, the consideration will be given if practicable to the rules of the air, but pilot are nevertheless reminded that they are ultimately responsible for the prevention of collision.

1. 5 miles en-routes along airways, and

2. 5 miles in Bangkok, Chiang Mai, Hat Yai, Hua Hin, Krabi, Phitsanulok, Sukhothai, Phuket, and U-Tapao TMAs/CTRs.

3. 10 miles in Nakhon Si Thammarat, Surat Thani, Samui and Ubon Ratchathani TMAs/CTRs.

1. Inbound aircraft

   Inbound on airway

   Aircraft flying on the airways system will be cleared into the TMA/CTR without having to request a specific entry clearance.

2. Inbound other than on airways

   Aircraft wishing to enter the TMAs/CTRs are required to obtain permission at least 10 minutes before reaching the zone boundary, when they will be advised of the route to be followed consistent with the current traffic situation.

3. Initial approach procedures with radar control

   1. When inbound traffic is being sequenced by radar, the initial and intermediate approach procedures will be flown under directions from the approach radar controller and will consist of the part of the approach between the zone boundary or the terminal holding fix and the final approach path. When holding procedures are not in use, radar sequencing may commence before the terminal holding fix.

   2. Pilots should plan their flight profile in such a manner as to be able to achieve the minimum holding level at the holding point if so required.

   3. When an aircraft is under approach radar control, changes of heading or flight level/altitude will be made only on instructions from the radar controller, except in the case of radio communication failure in the aircraft or at the radar unit.

   4. Heading and flight levels/altitudes at which to leave the zone boundary or holding areas will be passed by ATC. Radar vectors will be given and descent clearance will include an estimate of track distance to touchdown. Further distance information will be given between the initial descent clearance and intercept heading to the ILS.

   5. Speed control may be applied on a tactical basis to the extent determined necessary by the radar controller. Aircraft unable to conform to the speeds specified by the radar controller should inform ATC immediately and state what speeds will be used. In the interests of accurate spacing, pilots are requested to comply with speed adjustment as promptly as is feasible within their own operational constraints and should advise ATC if circumstances necessitate a change of speed for aircraft performance reasons.

   6. In the event of radar failure, new instructions will be issued to each aircraft under radar control and the procedures as defined for intermediate approach without radar control will be put into effect.

4. Initial approach procedures – without radar control

   When inbound traffic is not being sequenced by radar, aircraft will be cleared from the TMA zone boundary to carry out an instrument approach procedure appropriate for the landing direction.

5. Outbound Aircraft

   Routes from the airport

   1. Routes may be varied at ATC discretion according to the prevailing traffic conditions.

   2. Warning: Pilots are reminded to maintain adequate terrain clearance, except when being vectored under radar control, in which case the radar controller will ensure that adequate terrain clearance exists prior to issuing radar vectors.

   3. For ATC purposes, outbound aircraft will normally be required to cross a certain point at or above the altitude assigned. Pilots who cannot comply with the necessary climb profile must inform ATC in good time (i.e. before departure) so that an alternative routing can be coordinated.

   Visual reporting points

   1. To facilitate the integration of VFR flights within the controlled airspace, pilots may be required to join/leave the airspace via the specified visual reporting points.

   2. For the benefit of pilots of VFR flight who prefer to determine their position by radio navigation aids rather than by visual pin-points, the visual reporting points are suitably defined in AIP-Thailand.

1. TWO-WAY radio capable of communications with approach control units on appropriate frequency.

2. Operable radar beacon transponder.

3. Request for deviation from the 4096 transponder equipment must be submitted to appropriate approach control units at least one hour before the proposed operation.

4. An operable VOR, ADF or TACAN receiver.

1. Sequencing of all arriving radar controlled aircraft.

2. 5 NM radar separation between IFR aircraft.

3. 5 NM radar separation between IFR and VFR or Special VFR aircraft.

4. Between VFR aircraft – Traffic advisories and as appropriate safety alert, and also information to enable them to fit into the landing sequence.

5. Except for aircraft operating within Nakhon Si Thammarat, Surat Thani, Samui and Ubon Ratchathani are required 10 NM radar separation.

2.1.1  Bangkok Approach Control Service Operates:

ASR – station at Suvarnabhumi international airport position 134117.00N 1004625.00E

Range 80 NM with following limitations:

1. Altitude 1 000 feet within 45.5 NM

2. Altitude 2 000 feet within 58.9 NM

3. Altitude 3 000 feet within 53.6 NM

4. Altitude 5 000 feet within 55.9 NM

5. Altitude 7 000 feet within 63.3 NM

6. Altitude 10 000 feet within 68.9 NM

7. Altitude 15 000 feet within 67.3 NM

8. Altitude 20 000 feet within 73.9 NM

2.1.2  Hua Hin Approach Control Service Operates:

ASR – station at Hua Hin airport position 123729.00N 0995655.00E (On aerodrome HHN R195/0.6 NM)

Range 60 NM with following limitations:

1. Altitude 1 000 feet within 10 NM

2. Altitude 2 000 feet within 15 NM

3. Altitude 3 000 feet within 20 NM

4. Altitude 4 000 feet within 25 NM

5. Altitude 5 000 feet within 35 NM

6. Altitude 7 000 feet within 40 NM

7. Altitude 10 000 feet within 60 NM

8. Altitude 20 000 feet within 60 NM

3.1.1  Chiang Mai Approach Control Service Operates:

SSR – station at Chiang Mai international airport 184534.92N 0985801.45E with following limitations:

1. Altitude 3 000 feet within 26.5 NM

2. Altitude 4 000 feet within 38 NM

3. Altitude 6 000 feet within 57 NM

4. Altitude 8 000 feet within 75 NM

5. Altitude 11 000 feet within 95 NM

3.1.2  Hat Yai Approach Control Service Operates:

SSR – station at Hat Yai international airport 065607.98N 1002300.20E with following limitations:

1. Altitude 3 100 feet within 95.2 NM

2. Altitude 5 100 feet within 103.2 NM

3. Altitude 7 100 feet within 126.2 NM

4. Altitude 10 100 feet within 135.1 NM

3.1.3  Phitsanulok Approach Control Service Operates:

SSR – station at Phitsanulok airport position 164559.18N 1001642.28E with following limitations:

1. Altitude 1 200 feet within 41.3 NM

2. Altitude 2 200 feet within 52.5 NM

3. Altitude 3 200 feet within 69.1 NM

4. Altitude 5 200 feet within 89.9 NM

5. Altitude 7 200 feet within 105.8 NM

6. Altitude 10 200 feet within 123.3 NM

7. Altitude 20 000 feet within 174.6 NM

3.1.4  Phuket Approach Control Service Operates:

SSR – station at Bang Duk Hill, Phuket 080801.64N 0981946.52E with following limitations:

1. Altitude 3 000 feet within 56 NM

2. Altitude 4 000 feet within 56 NM

3. Altitude 6 000 feet within 99 NM

4. Altitude 8 000 feet within 106 NM

5. Altitude 11 000 feet within 119 NM

3.1.5  Surat Thani/Samui Approach Control Service Operates:

1. Altitude 1 000 feet within 45.9 NM

2. Altitude 2 000 feet within 64.8 NM

3. Altitude 3 000 feet within 74.6 NM

4. Altitude 5 000 feet within 102.1 NM

5. Altitude 7 000 feet within 114.0 NM

6. Altitude 10 000 feet within 127.7 NM

7. Altitude 20 000 feet within 173.4 NM

3.1.6  Ubon Ratchathani Approach Control Service Operates:

1. Altitude 1 500 feet within 56.0 NM

2. Altitude 2 500 feet within 70.7 NM

3. Altitude 3 500 feet within 81.7 NM

4. Altitude 5 500 feet within 100.3 NM

5. Altitude 7 500 feet within 116.2 NM

6. Altitude 10 000 feet within 130.4 NM

7. Altitude 20 000 feet within 179.4 NM

3.1.7  Suvarnabhumi Approach Control Service Operates:

1. Altitude 1 000 feet within 61.7 NM

2. Altitude 2 000 feet within 75.1 NM

3. Altitude 3 000 feet within 91.4 NM

4. Altitude 5 000 feet within 110.0 NM

5. Altitude 7 000 feet within 124.0 NM

6. Altitude 10 000 feet within 143.0 NM

7. Altitude 20 000 feet within 197.0 NM

3.1.8  Don Mueang Approach Control Service Operates:

SSR – station at Don Mueang international airport 135532.59N 1003620.46E with following limitations:

1. Altitude 1 500 feet within 35.1 NM

2. Altitude 3 000 feet within 59.5 NM

3. Altitude 5 000 feet within 78.5 NM

4. Altitude 7 000 feet within 101.2 NM

5. Altitude 10 000 feet within 117.6 NM

6. Altitude 15 000 feet within 142.3 NM

7. Altitude 20 000 feet within 169.7 NM

3.1.9  U-Tapao Approach Control Service Operates:

SSR – station at U-Tapao Rayong Pattaya international airport position 124055.10N 1005953.74E

Range 250 NM with following limitations:

1. Altitude 1 000 feet outer fringe 59.2 NM

2. Altitude 2 000 feet outer fringe 71.2 NM inner fringe 0.8 NM

3. Altitude 3 000 feet outer fringe 84.4 NM

4. Altitude 5 000 feet outer fringe 113.6 NM inner fringe 1.9 NM

5. Altitude 7 000 feet outer fringe 129.9 NM

6. Altitude 10 000 feet outer fringe 160.0 NM inner fringe 2.9 NM

7. Altitude 20 000 feet outer fringe 168.9 NM inner fringe 5.6 NM

3.5.1  Should an aircraft in flight be subjected to unlawful interference, the pilot shall endeavour to set the transponder to mode A/3 code 7500 to give indication of the situation unless circumstances warrant the use of mode A/3 code 7700.

3.5.2  When a pilot has selected mode A/3 code 7500 and subsequently requested to confirm his code by ATC, he shall, according to circumstances either confirm this or not reply at all.

3.7.1  All IFR aircraft flying within controlled airspace in Bangkok FIR shall be assigned transponder code as follows.

3.7.2  Pilots of aircraft about to enter Bangkok FIR who have not received specific instructions from ATC concerning the setting of the transponder shall operate the transponder on mode A/3 code 3300 before entry and maintain that code setting until otherwise instructed.

3.7.3  VFR Operation