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Anti-collision light visibility distance at night

Remote Pilot (Part 107) practice question 11 of 31 on Airspace / Operational Requirements. ACS element UA.II.B.K6 · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONFor operation at night under § 107.29, the small unmanned aircraft's anti-collision lighting must be visible for at least what distance?

  1. A1 statute mile
  2. B3 statute miles
  3. C5 statute miles, unless a waiver is held
Show the answer and explanation

Correct answer: B. 3 statute miles

  • A — incorrect The regulation requires visibility for at least 3 statute miles, not 1.
  • B — correct § 107.29(a)(2) requires lighted anti-collision lighting visible for at least 3 statute miles with a flash rate sufficient to avoid a collision.
  • C — incorrect No 5-statute-mile figure appears in § 107.29; the requirement is 3 statute miles.

BACKGROUND

Section 107.29 governs operation at night. Paragraph (a) allows night operation only if the remote pilot in command (RPIC) has completed an initial knowledge test or training under § 107.65 after April 6, 2021, and the small unmanned aircraft has lighted anti-collision lighting visible for at least 3 statute miles with a flash rate sufficient to avoid a collision. The same lighting is required during periods of civil twilight under paragraph (b). The RPIC may reduce the intensity of the lighting for safety reasons but may not extinguish it.

STUDY TIP

Note that the 3-statute-mile figure for anti-collision lighting matches the 3-statute-mile visibility minimum, which makes it easy to remember.

KEY POINTS

  • Night operation requires anti-collision lighting visible for at least 3 statute miles.
  • The lighting must have a flash rate sufficient to avoid a collision.
  • The same lighting is required during civil twilight.

SOURCES

  • 14 CFR 107.29(a)(2)
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MORE ON AIRSPACE / OPERATIONAL REQUIREMENTS

SkyDrill is not affiliated with the FAA. This is an original practice item based on 14 CFR part 107, 14 CFR part 89, and the FAA Remote Pilot – Small UAS Study Guide (FAA-G-8082-22). Regulations and handbooks are revised; confirm details against the current edition.