In the NAV mode, is it necessary to fly a full ILS approach with glideslope?

• A. TRUE
• B. FALSE
• C. NAV mode is optional
• D. Only LOC mode works with glideslope

Answer: (B)

NAV mode handles the horizontal tracking of a navigation course from sources like a VOR or the ILS localizer, but it does not automatically include vertical guidance. An ILS can provide glideslope for vertical guidance, but you are not required to fly the full ILS with glideslope when using NAV mode—you can fly just the localizer portion or switch to other approach modes as needed. In practice, you might intercept the localizer with NAV mode and descend using altitude constraints or step-down fixes, or opt for a non-precision approach if glideslope is unavailable.