unless otherwise authorized, what is the maximum airspeed at which a person may operate an suas below 400…

Brief Explanations:

According to the Federal Aviation Administration (FAA) Part 107 regulations, which govern the operation of small Unmanned Aircraft Systems (sUAS) in the United States, the maximum groundspeed allowed for a drone is 87 knots, which is equivalent to 100 miles per hour (mph). This limit is established to ensure safety and minimize the risk of high-energy impacts in the event of a collision or loss of control.

Answer:

100 mph.