"NA at Night" on instrument approach charts means "Not Authorized" during the period between the end of evening civil twilight and the beginning of morning civil twilight, primarily due to unlit obstacles penetrating the obstacle clearance surfaces below the minimum descent altitude or decision altitude.
Pilots are legally responsible for complying with "NA at Night" restrictions under Part 91.175(a), even if ATC issues an approach clearance, as these restrictions exist for pilot safety.
Ignoring "NA at Night" limitations carries both physical and regulatory risks, requiring pilots to prioritize safety by utilizing authorized approaches, considering alternative runways or airports, or delaying flight until daylight.
You planned this getaway weekend to Wise County, Virginia months ago. A cabin is ready. A rental car awaits you when you land at Lonesome Pine airport (KLNP). It’s good to be instrument rated. The reported ceilings are comfortably high at 1500 AGL. It’s nice to have the protection of an instrument approach when going somewhere new, especially in the Appalachians.
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