7.1 General
7.1.1 Definition
Sequencing is the process of arranging aircraft into an orderly and safe arrival flow for approach and landing.
The Approach Controller shall establish and maintain sequencing to ensure continuous traffic flow and safe separation.
7.1.2 Controller Responsibilities
The Approach Controller shall:
- Establish the landing sequence as early as practicable
- Maintain separation between aircraft at all times
- Deliver aircraft in a stable and predictable order
- Monitor spacing continuously
Sequencing shall be proactive and continuously managed.
7.1.3 Objectives
The Approach Controller shall:
- Maintain minimum separation standards
- Deliver stable final approaches
- Minimise controller workload
- Optimise runway throughput
Efficiency shall not compromise separation or safety.
7.1.4 Sequencing Methods
The Approach Controller shall use:
- Speed control as the primary tool for spacing
- Radar vectoring to position aircraft
- Downwind extension where additional spacing is required
Speed control shall be applied early to reduce the need for corrective vectoring.
7.1.5 Planning and Anticipation
The Approach Controller shall:
- Plan the sequence in advance
- Anticipate spacing requirements
- Adjust sequencing before conflicts develop
Late or reactive sequencing shall be avoided.
7.1.6 Key Concept
Effective sequencing is proactive.
The Approach Controller shall:
- Build the sequence early
- Maintain spacing continuously
- Avoid last-minute corrections
Good sequencing reduces the need for corrective action later.