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Air Traffic Management Concept Baseline Definition - The Boeing ...

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6.2.5 NAS Surface<br />

Figure 6.9 shows the proposed concept transition path to achieve increased capacity on<br />

the airport surface. <strong>The</strong> chart shows two independent enhancement paths, the one on the<br />

right centered on low visibility operations, the one on the left centered on good VMC.<br />

<strong>The</strong> improvements are described in detail below.<br />

Additional Gates, Taxiways and Aprons<br />

This enhancement will be needed along with any additional runways, or improved runway<br />

utilization, to ensure that the airport surface does not become the constraining factor in<br />

the operation. <strong>The</strong> <strong>Air</strong>port Improvement Program is the cornerstone for this<br />

enhancement.<br />

Reduced Schedule Uncertainty<br />

This enhancement involves reducing variability of operations at major hubs during peaks,<br />

so that arriving aircraft can get to a gate expediently, and thus avoid gridlock on taxiways<br />

and apron areas. This will involve both more predictable aircraft turnaround time, and<br />

better airport flow management, which should result in less schedule padding due to<br />

variance in traffic related delay.<br />

CNS/ATM Transition Logic Diagram NAS<br />

Surface (2)<br />

Improved Throughput Capacity<br />

Good Visibility<br />

Low Visibility<br />

AIP<br />

Additional<br />

Gates, Taxiways<br />

and Aprons<br />

AMASS<br />

ASDE<br />

Improved Surface<br />

Guidance<br />

and Control<br />

Lights<br />

Reduce<br />

Turnaround<br />

Time<br />

Reduce<br />

Schedule<br />

Uncertainty<br />

Enhanced<br />

Flow<br />

Managmt<br />

Surface<br />

Guidance<br />

Visual Throughput<br />

in CAT IIIb<br />

RNP 0.1<br />

Surface<br />

<strong>Traffic</strong><br />

Automation<br />

Data Link<br />

Improved Surface<br />

Sequencing,<br />

Scheduling and<br />

Routing<br />

RTA<br />

ASDE<br />

CDTI<br />

Figure 6.9 CNS/ATM Transition for the <strong>Air</strong>port Surface.<br />

Improved Surface Sequencing, Scheduling and Routing<br />

This involves surface surveillance and automation to sequence, schedule and route aircraft<br />

through the taxiway system more effectively.<br />

Improved Surface Guidance and Control<br />

113

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