Final answer:
To operate an sUAS in Class C airspace, ATC authorization is required. While a visual observer can enhance safety, it is not strictly required by the FAA. Two-way radio communication and transponders with altitude reporting are not generally mandated for sUAS in Class C airspace.
Step-by-step explanation:
The requirements for operating a small Unmanned Aircraft System, commonly known as an sUAS, in Class C airspace are quite specific. In general, the operator must secure ATC authorization before flying in Class C airspace. This is typically achieved via a process set forth by the FAA, such as through LAANC (Low Altitude Authorization and Notification Capability) or by direct contact with the air traffic control responsible for that airspace.
Additionally, while a two-way radio is often necessary for manned aircraft, it is not necessarily a requirement for sUAS operations in all airspaces. However, the sUAS must be equipped with remote identification capabilities. For enhanced safety, some operators may also use a visual observer to maintain situational awareness and avoid potential conflicts with manned aircraft, though this is not a strict FAA requirement. In contrast, a transponder with altitude reporting capabilities is generally not a requirement for sUAS under the current regulations.