TIME BASED SEPARATION - European Commission · 2016-09-22 · Introduction • Aim - Improve...
Transcript of TIME BASED SEPARATION - European Commission · 2016-09-22 · Introduction • Aim - Improve...
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Heathrow Concept of Operation
TIME BASED SEPARATION
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Introduction
• Aim - Improve landing rate resilience to headwind conditions on final approach
• How - Change from distance based separation to time based separation rules
• Tools to support the safe application of Time Based Separation (TBS) between wake pairs
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Headwind affect on landing rate
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Normal Landing Rate – Light Headwind
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Headwind affect on landing rate
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Normal Landing Rate – Light Headwind
Reduced Landing Rate – Strong Headwind
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Heathrow wind delay
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Wind is the biggest cause of Heathrow ATFM delay
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DBS/TBS Minima
Nautical Miles
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4
5
6
7
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TBS equivalent (seconds)
68
90
113
135
158
180
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Effect on Distance Between Aircraft
Light
Headwind
90s = 4NM
Strong
Headwind
90s = 3.5NM
90s = 4.25NM
Light
Tailwind
IAS = Steady 160kt
Mean GS = 160kt
IAS = Steady 160kt
Mean GS = 141kt
IAS = Steady 160kt
Mean GS = 169kt
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Indicators
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• Distance indicators
– TBS indicator distance
– Actual distance from indicator
• Aircraft/indicator pairing
Quick Look Tools
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TBS System Overview
AMAN
MET RULES
RADAR SEQUENCE
Heathrow Approach
NODE
Heathrow Tower
ATM
TBS ENGINE
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TBS Landing Rate Recovery
Normal Landing Rate – Light Headwind
Reduced Landing Rate – Strong Headwind
TBS Landing Rate – Strong Headwind
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Benefits
Flight cancellations due to strong
headwinds would be minimised
Reduce ATFM delays due to strong
headwinds on final approach by up to 50%
Save over 80,000 minutes of delay per
annum through recovering lost landing
rate
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Tower and Approach
ATCOs trained how
to use indicators
ATC Procedures
will be written and published
KEY ACTIONS
Working with the UK regulator
Switch indicators on with current distance
based rules
Consolidate using
indicators with
familiar DBS rules
Further training in simulator
before moving to TBS rules
Operational Spring 2015
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Thanks for your attention
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