Aircraft established on final within 5 miles shall be separated by a minimum of?

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Multiple Choice

Aircraft established on final within 5 miles shall be separated by a minimum of?

The main idea is approach spacing: when two aircraft are established on the same final approach within five miles of the runway, they must maintain a minimum longitudinal separation of 1.5 nautical miles. This distance provides a safe gap for descent and speed adjustments as both aircraft line up for landing, taking into account typical approach speeds and wake turbulence. Values smaller than 1.5 NM would not give enough margin for the follower to respond to speed changes or for the lead to complete the landing safely, while 2 miles or more would unnecessarily constrain throughput. So, 1.5 miles is the correct minimum within that five-mile window.

The main idea is approach spacing: when two aircraft are established on the same final approach within five miles of the runway, they must maintain a minimum longitudinal separation of 1.5 nautical miles. This distance provides a safe gap for descent and speed adjustments as both aircraft line up for landing, taking into account typical approach speeds and wake turbulence. Values smaller than 1.5 NM would not give enough margin for the follower to respond to speed changes or for the lead to complete the landing safely, while 2 miles or more would unnecessarily constrain throughput. So, 1.5 miles is the correct minimum within that five-mile window.

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