TTX – 18

1. Prevent collisions between aircrafts.
2. Prevent collisions between aircrafts on the manoeuvring area and obstructions on that area.
3. Expedite and maintain an orderly flow of traffic.
4. Provide advice and information useful for the safe and efficient conduct of flights.
5. Notify appropriate organisations regarding aircraft in need of Search And Rescue aid and assist such organisations as required. 

"information" and "clearances"

"safe", "orderly" and "expeditious"

"preventing collisions"

1. Aircraft flying in the aerodrome traffic circuits around an aerodrome
2. Aircraft operating on the manoeuvring area
3. Aircraft landing or taking off
4. Aircraft and vehicles operating on the manoeuvring area
5. Aircraft on the manoeuvring area and obstructions on that area

Approach owns airspace.

Aerodrome Control is the airspace operator (does NOT own airspace).

- Aircraft is in the vicinity of the aerodrome and
   1. it is considered that approach and landing will be completed in visual reference to the ground, OR
   2. has reached uninterrupted VMC.

OR

- Aircraft is at a prescribed point or level.

OR

- Aircraft has landed.

- When VMC prevails in the vicinity of the aerodrome
   1. Prior to the time the aircraft leaves the vicinity of the aerodrome, OR
   2. Prior to the aircraft entering IMC, OR
   3. When the aircraft is at a prescribed point or level

- When IMC prevails at the aerodrome
   1. Immediately after the aircraft is airborne, OR  
   2. When the aircraft is at a prescribed point or level
 

- direct negotiation and agreement for individual flights
- standing agreement made in accordance with local instructions
- use of permanent procedures agreed between national aviation authorities
- electronically

Standard clearances without prio coordination.

Prio coordination required only in the event of variations to standard clearances.

Keep APP informed of departure sequence and RWY to be used.

Assigned SID must be displayed to ADC, APP and ACC sector.