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CFI lesson plans to teach aviation lessons as a Certified Flight Instructor

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INCREASED SEPARATION REQUIRED (ISR)

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ISR

Indicates the confidence level of the track requires 5 NM separation. 3 NM separation, 1 1/2 NM separation, and target resolution cannot be used.

Source FAA Pilot/Controller Glossary↗ · checked 2026-08-25

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