Which pairing of numbers is correct for CAT II preceding and succeeding CAT I departures?

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Multiple Choice

Which pairing of numbers is correct for CAT II preceding and succeeding CAT I departures?

This tests how vertical separation is allocated when departures are in different instrument categories. When a CAT II departure precedes a CAT I departure, the sequencing uses a lower altitude for the earlier flight and a higher altitude for the following flight to ensure safe margins during the initial climb, accounting for wake turbulence and performance differences. The pairing with 3,000 ft for the preceding CAT II and 4,500 ft for the succeeding CAT I provides that necessary headroom: the earlier flight can begin its climb with the appropriate clearance, while the later CAT I flight reaches a higher altitude before crossing the same airspace, maintaining safe separation as both depart in quick succession. Choosing the opposite (a higher altitude first or the same altitude for both) would reduce the available separation margin and could compromise safety given the differing performance envelopes of CAT II versus CAT I operations.

This tests how vertical separation is allocated when departures are in different instrument categories. When a CAT II departure precedes a CAT I departure, the sequencing uses a lower altitude for the earlier flight and a higher altitude for the following flight to ensure safe margins during the initial climb, accounting for wake turbulence and performance differences.

The pairing with 3,000 ft for the preceding CAT II and 4,500 ft for the succeeding CAT I provides that necessary headroom: the earlier flight can begin its climb with the appropriate clearance, while the later CAT I flight reaches a higher altitude before crossing the same airspace, maintaining safe separation as both depart in quick succession. Choosing the opposite (a higher altitude first or the same altitude for both) would reduce the available separation margin and could compromise safety given the differing performance envelopes of CAT II versus CAT I operations.

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