Crossing and Passing MAAFAS

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Crossing and PassingMA-AFAS

• Tony Henley
• BAE SYSTEMS

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Basic Instructions

• Pass 8NM behind target, then resume to WPT
• Pass above/below target to LEVEL
• Pass 8NM left/right of target, then resume to WPT

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PASS BEHIND

• Conditions
• Two aircraft at same flight level
• Lateral routes cross at angles (50-140)
• Separation will be lost without course change
• Action
• Instruct target aircraft to maintain heading
• Issue Pass Behind instruction

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PASS BEHIND
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ImplementationSequence

• Identify conditions for application
• Identify Target
• Issue Instruction
• Implement and monitor instruction

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Identify Target
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Issue Instruction
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Implement Instruction
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Video
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Rome - Flight Results
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End
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PASS ABOVE

• Conditions
• Aircraft have similar lateral routes
• Lead aircraft is slower than trailing aircraft
• Lead aircraft is above trailing aircraft
• Trailing aircraft wishes to climb
• Action
• Instruct lead aircraft to maintain altitude
• Issue PASS ABOVE instruction

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PASS ABOVE
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PASS ABEAM

• Conditions
• Aircraft operating at same flight level
• Aircraft on same lateral route
• Trailing aircraft faster than lead aircraft
• Action
• Instruct lead aircraft to maintain speed
• Issue PASS instruction to trailing aircraft

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PASS ABEAM
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Variations

• Spacing
• Can be specified by controller
• Defaults 1000ft vertical, 8NM lateral
• Resume
• to waypoint
• own navigation