What is the primary role of a First Officer on an aircraft?

The primary role of a First Officer, also known as the co-pilot, is to assist the Captain with flight operations and responsibilities. This includes supporting the Captain in flight planning, operating the aircraft, monitoring systems, and ensuring that all safety protocols are followed during flight. The First Officer works closely with the Captain, taking on specific tasks and responsibilities as directed, which not only aids in the smooth operation of the flight but also contributes to overall safety.

In contrast, the role of pilot in command pertains specifically to the Captain, who has the final authority and responsibility for the aircraft. Managing ground operations is typically a function assigned to ground staff or operations personnel, rather than flight crew members. Providing customer service to passengers is primarily handled by cabin crew members, such as flight attendants, who focus on passenger comfort and safety during the flight.