During an instrument approach, when should APPR or NAV mode be selected?

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Multiple Choice

During an instrument approach, when should APPR or NAV mode be selected?

In an instrument approach, NAV mode is used to guide you toward and join the published approach path, while APPR mode takes over to fly the published approach once you’re cleared for it. You’d typically use NAV to intercept or align with the initial approach course and bring you to the final approach segment. When you are cleared for the approach, you switch to APPR so the autopilot follows the final approach path—capturing the localizer and/or glideslope and descending along the published procedure. That sequence is why this is the best answer: it reflects using NAV to join the approach, then switching to APPR once cleared to fly the approach itself. The other options don’t fit because APPR isn’t used before you’re cleared for the approach, NAV isn’t reserved for after landing or during climb, and APPR isn’t tied to intercepting the localizer alone without clearing for the approach.

In an instrument approach, NAV mode is used to guide you toward and join the published approach path, while APPR mode takes over to fly the published approach once you’re cleared for it. You’d typically use NAV to intercept or align with the initial approach course and bring you to the final approach segment. When you are cleared for the approach, you switch to APPR so the autopilot follows the final approach path—capturing the localizer and/or glideslope and descending along the published procedure.

That sequence is why this is the best answer: it reflects using NAV to join the approach, then switching to APPR once cleared to fly the approach itself. The other options don’t fit because APPR isn’t used before you’re cleared for the approach, NAV isn’t reserved for after landing or during climb, and APPR isn’t tied to intercepting the localizer alone without clearing for the approach.

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