If radar is available, what is the minimum radar separation, in miles, for a BE36 to depart behind an MD11?

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Multiple Choice

If radar is available, what is the minimum radar separation, in miles, for a BE36 to depart behind an MD11?

Explanation:
Wake turbulence from a heavy jet can affect a following light aircraft, so the trailing plane needs a safe margin. When radar is available, the controller can reliably ensure a five-mile separation between a light airplane and a preceding heavy like an MD11. This 5-mile spacing lets wake effects dissipate while still taking advantage of precise radar tracking. If radar weren’t available, the required separation would be larger (typically six miles) to cover the reduced ability to monitor exact distance. Three or four miles wouldn’t provide enough wake clearance, and six miles isn’t necessary with radar.

Wake turbulence from a heavy jet can affect a following light aircraft, so the trailing plane needs a safe margin. When radar is available, the controller can reliably ensure a five-mile separation between a light airplane and a preceding heavy like an MD11. This 5-mile spacing lets wake effects dissipate while still taking advantage of precise radar tracking. If radar weren’t available, the required separation would be larger (typically six miles) to cover the reduced ability to monitor exact distance. Three or four miles wouldn’t provide enough wake clearance, and six miles isn’t necessary with radar.

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