FAA Regulation

No more than three as long as the Remote PIC maintains visual line of sight. As many as he/she can handle. No more than one. 

Finish the mission by paying extra attention to the surrounding. Land as soon as practical and determine if the mission can be restarted without a Visual Observer.  Continue the mission without ...

The Remote Pilot in Command (RPIC). The owner of the aircraft. The FAA.

Operating your sUAS for an imagery company.   Flying for enjoyment with family and friends. Conducting public operations during a search mission.

The owner of the aircraft. The manufacturer of the aircraft. The operator of the aircraft.

must be made immediately to the NTSB.  must be made within 10 days to the FAA. is not required.

Remote Pilot in Command (Remote PIC). Person manipulating the controls. Visual observer.

must not cause injury to a human being equivalent to 11 ft-lb of kinetic energy.  must have an approved type certificate issued under Part 21. must not cause injury to a ...