Part 107 requires at least 3 statute miles of visibility and specific distances from clouds: 500 feet below, 1,000 feet above, 2,000 feet horizontal. Here is what each number means in practice, where the rules come from, and the trap answers to watch for on the test.
Part 107 requires at least 3 statute miles of visibility and specific distances from clouds. The rule comes from 14 CFR § 107.51(c) and (d).
Cloud clearance is the pattern 500-1,000-2,000: 500 feet below clouds, 1,000 feet above clouds, 2,000 feet horizontal from clouds.
| Requirement | Value | Source |
|---|---|---|
| Minimum flight visibility | 3 statute miles | 14 CFR § 107.51(c) |
| Minimum distance below clouds | 500 feet | 14 CFR § 107.51(d) |
| Minimum distance above clouds | 1,000 feet | 14 CFR § 107.51(d) |
| Minimum horizontal distance from clouds | 2,000 feet | 14 CFR § 107.51(d) |
Visibility is measured from the control station (where you are standing), not from the drone's position. If standing fog or haze drops your visibility below 3 statute miles, you cannot fly even if the drone itself can see further.
Memory shortcut: "500 down, 1,000 up, 2,000 sideways." The vertical numbers are small (500/1,000); the horizontal number is the largest (2,000) because clouds move sideways faster than they move up or down relative to you.
Most test questions on this topic show all three numbers together as answer choices with one of them swapped. Memorizing them as a set, not as individual facts, is the fastest way to get these questions right.
The FAA does not define an altitude threshold for what counts as a cloud. Any visible cloud, fog bank, or moisture that meets normal aviation definitions counts.
Haze, mist, and low-visibility air mass are different from clouds for the purpose of this rule. Those affect visibility (the 3 SM rule), not cloud clearance.
If you can see the cloud, you need to stay clear of it by the required distances. If a cloud forms directly above you during a flight, descend to a safe altitude that maintains the 500-foot below-cloud clearance, or land.
You are responsible for maintaining VFR weather minimums throughout the flight, not just at takeoff. If visibility drops below 3 SM during a flight, or if clouds move into your operating area and you can no longer maintain the clearance, land as soon as practicable.
Check METARs and TAFs before every commercial flight. The Aviation Weather Center (aviationweather.gov) publishes current and forecast conditions for nearby airports. Even a 5-minute weather brief reduces the risk of a no-go condition appearing mid-flight.
Content here is derived from 14 CFR Part 107 and the FAA Pilot's Handbook of Aeronautical Knowledge (FAA-H-8083-25C). It is for educational purposes. Verify current rules with the FAA before any flight.
Practice with real FAA style questions and get detailed explanations for every answer.