Final answer:
The Remote Pilot in Command must inspect the small UAS before each flight to ensure it is safe for operation, which may be multiple times per day, using checklists as a common tool for thorough inspections.
Step-by-step explanation:
The question addresses the frequency at which the Remote Pilot in Command (PIC) is required to inspect a small unmanned aircraft system (UAS) to ensure its safety for operation. According to the Federal Aviation Administration (FAA) regulations, the Remote PIC must perform pre-flight checks before each flight to ensure the UAS is in a condition for safe operation. There is no specified interval for these inspections; however, it is implied that an inspection must occur before every flight, which could be multiple times a day depending on the number of flights conducted. Checklists are a common tool used to help ensure thorough inspections, similar to the WHO surgical checklist referenced, which is used to reduce workplace accidents. Safety protocols, including mandatory rest periods for pilots, are put in place to prevent accidents due to operator fatigue.