What is the minimum flight visibility, as observed from the control station, required for small UAS operations under Part 107?

Explanation

Part 107 requires a minimum flight visibility of 3 statute miles measured from the location of the control station, which is what lets the remote pilot see and avoid other aircraft and obstacles. One statute mile is the special VFR figure used by manned aircraft, not the Part 107 minimum. Five statute miles applies to certain manned operations in Class E above 10,000 ft, and Part 107 visibility is stated in statute miles rather than nautical miles.