FAA Part 107 Remote Pilot (UAG)Airspace and Operating RequirementsMedium
A visual observer is assisting a remote pilot in command to maintain visual line of sight. According to Part 107, how must the visual observer see the small UAS?
- AWith any electronic device that provides real-time video from the aircraft
- BUsing binoculars is acceptable as long as the observer periodically scans with unaided vision
- CUnaided vision, except that corrective lenses or contacts may be used
- DThrough night-vision goggles when operating during civil twilight
Show answer & explanationAnswer & explanation
Correct answer: C. Unaided vision, except that corrective lenses or contacts may be used
Under 14 CFR 107.31, visual line of sight must be maintained using unaided vision, which may be corrected with contacts or eyeglasses; devices such as binoculars, FPV goggles, or night-vision equipment may not be used to satisfy the VLOS requirement, though they may supplement situational awareness momentarily.
Why the other options are wrong
- A. Electronic devices like FPV video feeds cannot be used to meet the VLOS requirement.
- B. Binoculars may only be used briefly to enhance situational awareness, not to satisfy the VLOS requirement itself.
- D. Night-vision goggles do not qualify as unaided vision under 107.31.
Visual Line of Sight (VLOS)
Requirement under 107.31 that the remote pilot, visual observer, or person manipulating controls be able to see the sUAS with unaided vision (corrective lenses permitted) at all times during flight.
- Corrective lenses/contacts allowed
- Binoculars/FPV cannot substitute for VLOS
- Momentary device use permitted, not continuous reliance
Memory trick: VLOS = 'Vision, Lenses Only, Simple' — no gadgets allowed.