"NA at Night" on an instrument approach chart signifies that the procedure is "Not Authorized" during the period between the end of evening civil twilight and the beginning of morning civil twilight.
This restriction is primarily due to the presence of unlit obstacles in the visual segment of the approach path, which poses a safety hazard for pilots transitioning from instrument to visual flight at night.
Pilots operating under Part 91 are legally required to comply with "NA at Night" restrictions, as it is the pilot's responsibility to adhere to published procedures, even if ATC issues an approach clearance.
When faced with an "NA at Night" restriction, pilots must choose an authorized alternative, such as another approach, diverting to a different airport, waiting until daylight, or cancelling IFR if safe visual conditions allow for a VFR landing.
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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