In the chain of command for flight personnel, who is the second in command?

The first officer is considered the second in command in the chain of command for flight personnel. This position plays a critical role alongside the captain during flight operations. The first officer assists with navigating, communicating, and managing the aircraft systems, while also ready to take command if the captain is unable to fulfill their duties.

In contrast, the captain is ultimately the leader of the flight crew and holds the highest level of authority and responsibility. Flight attendants, while essential for passenger safety and comfort, do not hold a command position within the flight operations structure and therefore are not part of the cockpit hierarchy. This established chain of command is essential for efficient and effective communication and decision-making during all phases of flight.