Part 107 Night & Operating Limitations Questions

Groundspeed limit UAG-03-011

A trainee without a remote pilot certificate flies your sUA under your direct supervision and pushes it to 95 knots groundspeed. Under 107.51, who is bound by the operating limitations?

You, since the trainee has no certificate and can't be bound by the limits You and the trainee at the controls The trainee, since he is the one flying it

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The answer is B: You and the trainee at the controls

107.51 opens by binding the remote PIC and the person manipulating the flight controls to every limit in it, so both are responsible for exceeding 87 knots. The trainee's lack of a certificate does not shift the duty to the remote PIC alone, and being at the controls does not make it the trainee's alone.

Source: 14 CFR 107.51(a) ACS UA.I.B.K21

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Altitude limits UAG-03-019

Your drone's telemetry reports its altitude above mean sea level. According to AC 107-2A, how can you use that readout to check the Part 107 altitude limit?

Subtract the control station's MSL elevation from the MSL readout Use the MSL readout directly, since the Part 107 limit is in MSL Add the control station's MSL elevation to the aircraft's MSL altitude

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The answer is A: Subtract the control station's MSL elevation from the MSL readout

AC 107-2A 5.12.2 describes subtracting the control station's MSL elevation from the aircraft's reported MSL altitude to find its height above the ground, because the 400-foot limit is AGL. Adding the elevation runs the conversion backward, and the limit is not an MSL value.

Source: AC 107-2A 5.12.2 14 CFR 107.51(b) ACS UA.I.B.K21b

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Visibility UAG-03-024

A friend who flies airplanes says that in Class G airspace by day, low-level VFR flight needs only 1 statute mile visibility, so your drone job should be fine in 2 miles of haze. What minimum visibility does Part 107 require?

3 statute miles from the control station 1 statute mile in Class G by day 2 statute miles from the control station

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The answer is A: 3 statute miles from the control station

Part 107 uses one visibility minimum in every airspace class: 3 statute miles observed from the control station (107.51(c)). The 1-mile Class G figure is a Part 91 manned-aircraft minimum, and Part 91 weather minimums don't govern small UAS.

Source: 14 CFR 107.51(c) AC 107-2A 5.10 ACS UA.I.B.K21c

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Cloud clearance UAG-03-033

The METAR for your site reads: KXYZ 211450Z 18006KT 10SM SCT006 BKN035 22/12 A3010 A colleague says the ceiling is 3,500 feet, so the scattered clouds at 600 feet don't matter. What is correct?

Cloud distances apply to the scattered clouds too Scattered clouds are a concern for manned aircraft, not for drones The cloud distances are measured from the ceiling layer

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The answer is A: Cloud distances apply to the scattered clouds too

A scattered layer is not a ceiling, but 107.51(d) applies to any cloud: the sUA must stay 500 feet below and 2,000 feet horizontally from each cloud, including the scattered ones at 600 feet. The ceiling definition (the lowest broken or overcast layer) does not exempt FEW or SCT clouds from the Part 107 distances.

Source: 14 CFR 107.51(d) AIM 7-1-29 ACS UA.I.B.K21d

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Daylight and civil twilight UAG-03-043

You are flying a sunset shoot on Maui, Hawaii. How long after official sunset does the 107.29(c) evening civil twilight period last?

30 minutes, as everywhere outside Alaska As long as the Air Almanac gives for Hawaii One hour, because Hawaii is in the tropics

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The answer is A: 30 minutes, as everywhere outside Alaska

107.29(c) singles out only Alaska for the Air Almanac definition; everywhere else, Hawaii included, evening civil twilight runs from official sunset to 30 minutes after it. No location uses a one-hour period.

Source: 14 CFR 107.29(c) ACS UA.I.B.K24

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Operations near airports UAG-03-066

Your farm field job is 2 miles from a small non-towered airport, entirely in Class G airspace. What does Part 107 require with regard to the airport?

Permission from the airport manager before each flight No authorization, but you must not interfere with its traffic LAANC authorization, since you are within 5 miles of an airport

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The answer is B: No authorization, but you must not interfere with its traffic

No ATC authorization is needed in Class G, and AC 107-2A says that outside controlled airspace no notification or authorization is needed near an airport. 107.43 still prohibits interfering with operations and traffic patterns there. Part 107 has no 5-mile authorization rule, and the airport manager's permission is not required.

Source: AC 107-2A 5.10.1 14 CFR 107.43 ACS UA.I.B.K17

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Operating Limitations, Night & Airspace Rules

A trainee without a remote pilot certificate flies your sUA under your direct supervision and pushes it to 95 knots groundspeed. Under 107.51, who is bound by the operating limitations?

Your drone's telemetry reports its altitude above mean sea level. According to AC 107-2A, how can you use that readout to check the Part 107 altitude limit?

A friend who flies airplanes says that in Class G airspace by day, low-level VFR flight needs only 1 statute mile visibility, so your drone job should be fine in 2 miles of haze. What minimum visibility does Part 107 require?

The METAR for your site reads: KXYZ 211450Z 18006KT 10SM SCT006 BKN035 22/12 A3010 A colleague says the ceiling is 3,500 feet, so the scattered clouds at 600 feet don't matter. What is correct?

You are flying a sunset shoot on Maui, Hawaii. How long after official sunset does the 107.29(c) evening civil twilight period last?

Your farm field job is 2 miles from a small non-towered airport, entirely in Class G airspace. What does Part 107 require with regard to the airport?

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