The book that each pilot receives before each mission is typically referred to as the "flight manual" or "pilot's operating handbook" (POH). Its main purpose is to serve as a comprehensive guide that provides essential information about the specific aircraft the pilot will be flying. The manual contains details on the aircraft's systems, performance characteristics, operating procedures, limitations, emergency procedures, and other relevant information.
Pilots use the flight manual to familiarize themselves with the aircraft's capabilities and limitations, ensuring safe and efficient operation. It also serves as a reference during flight for procedures and checklists. The manual is a crucial tool for pilots to conduct pre-flight planning, understand the aircraft's handling characteristics, and respond appropriately to various situations that may arise during the mission. Following the procedures outlined in the flight manual helps ensure the safety of the flight and the well-being of both the pilot and the aircraft.