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Horizontal extent of tower guy wires

Remote Pilot (Part 107) practice question 10 of 31 on Airspace / Operational Requirements. ACS element UA.II.B.K4g · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONAbout how far can the guy wires supporting a skeletal structure extend horizontally from the structure?

  1. AAbout 2,000 feet
  2. BAbout 1,500 feet
  3. COnly about 200 feet
Show the answer and explanation

Correct answer: B. About 1,500 feet

  • A — incorrect 2,000 feet is the recommended horizontal avoidance distance from the structure, not the extent of the wires themselves.
  • B — correct The study guide states that guy wires can extend about 1,500 feet horizontally from a structure.
  • C — incorrect The wires reach much farther, about 1,500 feet, which is why a wide berth is recommended.

BACKGROUND

Skeletal structures such as radio and television antenna towers are usually held up by guy wires. The Remote Pilot Study Guide notes that these wires are very difficult to see in good weather and can be invisible at dusk or during periods of reduced visibility. The wires can extend about 1,500 feet horizontally from the structure. For that reason the guide advises avoiding all skeletal structures horizontally by at least 2,000 feet, and it cautions that new towers may not appear on a current chart if the information arrived after printing.

STUDY TIP

Keep the two numbers straight: wires reach about 1,500 feet, so the recommended clearance is 2,000 feet.

KEY POINTS

  • Guy wires can reach about 1,500 feet horizontally from a tower.
  • They are hard to see even in good weather.
  • Recommended horizontal clearance from skeletal structures is at least 2,000 feet.

SOURCES

  • Remote Pilot Study Guide (remote_pilot_study_guide.txt) ch11 "Antenna Towers"
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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.