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New towers missing from current charts

Remote Pilot (Part 107) practice question 26 of 31 on Airspace / Operational Requirements. ACS element UA.II.B.K7 · difficulty: recall. Want to answer it in a timed quiz? Use the Remote Pilot (Part 107) practice mode.

Question bank updated 2026-09-22

QUESTIONWhy might a newly built antenna tower not appear on a remote pilot's current aeronautical chart?

  1. ACharts show only towers that exceed 2,000 feet AGL, so shorter new towers are omitted
  2. BThe tower information was not received before the chart was printed
  3. CPrivately owned towers are never depicted on sectional charts by policy
Show the answer and explanation

Correct answer: B. The tower information was not received before the chart was printed

  • A — incorrect The guide gives no such height threshold for charting; its explanation is the timing of information relative to chart printing.
  • B — correct The study guide notes that new towers may not be on your current chart because the information was not received prior to the printing of the chart.
  • C — incorrect The guide does not tie charting to ownership; the reason it gives is that information arrived too late for the printed chart.

BACKGROUND

Ground structures such as radio and television antenna towers are a major obstacle hazard for low-altitude flight. The Remote Pilot Study Guide cautions that new towers may not be on a current chart because the information was not received prior to the printing of the chart. This means a chart-based site survey alone cannot be trusted to reveal every tall structure. The guide separately lists temporary erection of obstacles near airfields and inoperable lights on tall obstructions as reasons that Notices to Airmen (NOTAMs) are issued, which is why NOTAM review complements the chart.

STUDY TIP

Pair chart review with a NOTAM check and an on-site visual survey, because the chart can lag behind construction.

KEY POINTS

  • New towers may be missing from a chart because information arrived after printing.
  • A printed chart cannot be assumed to show every tall structure.
  • NOTAMs cover temporary obstacles near airfields and inoperable obstruction lights.

SOURCES

  • remote_pilot_study_guide.txt ch11 "Antenna Towers"
  • remote_pilot_study_guide.txt ch2 "Notices to Airmen (NOTAMs)"
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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.