SESKStuff Everyone Should Know
SESK: Stuff Everyone Should Know · sesk.info/sport-103-daylight

When may you normally operate a Part 103 ultralight?

Between sunrise and sunset.

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  1. Any time with lights on
  2. Only between sunrise and sunset ✔
  3. Until one hour after sunset

Why: Part 103 allows ultralight operation only between sunrise and sunset. There is a narrow twilight exception, but only if the vehicle has an anticollision light and stays in uncontrolled airspace.

Huh, didn't know that: In Alaska the twilight period is defined by civil twilight in the Air Almanac instead of 30 minutes.

The dad joke
Why do ultralight pilots love the sunrise? It's their official green light.
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References

Answer: Only between sunrise and sunset. Part 103 allows ultralight operation only between sunrise and sunset. There is a narrow twilight exception, but only if the vehicle has an anticollision light and stays in uncontrolled airspace.

  1. 14 CFR Part 103, Ultralight Vehicles (eCFR) www.ecfr.gov/api/renderer/v1/content/enhanced/current/title-14?part=103
    No person may operate an ultralight vehicle except between the hours of sunrise and sunset.
    Checked 2026-10-11.

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Test yourself in the game

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