What shall non-radar aircraft on a published approach be separated by?

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Multiple Choice

What shall non-radar aircraft on a published approach be separated by?

In a nonradar environment, separation on a published approach is maintained using time and distance because there’s no radar to measure spacing. The established standard is two minutes or five miles, whichever is greater, between aircraft on the same published approach path in the terminal area. This pairing keeps enough lead for the trailing aircraft to react and ensures adequate obstacle and wake turbulence margins at typical approach speeds. So, two minutes corresponding to about five miles is the correct spacing. The other options propose tighter or looser separations that don’t align with the standard for nonradar separation on a published approach.

In a nonradar environment, separation on a published approach is maintained using time and distance because there’s no radar to measure spacing. The established standard is two minutes or five miles, whichever is greater, between aircraft on the same published approach path in the terminal area. This pairing keeps enough lead for the trailing aircraft to react and ensures adequate obstacle and wake turbulence margins at typical approach speeds.

So, two minutes corresponding to about five miles is the correct spacing. The other options propose tighter or looser separations that don’t align with the standard for nonradar separation on a published approach.

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