What is the purpose of a navigation log?

A navigation log is a critical tool used by pilots to ensure they maintain an accurate and efficient flight path. Its primary purpose is to function as a record of essential information regarding heading changes, distances, and times during a flight. By documenting this information, pilots can assess their progress, make necessary adjustments, and ensure they are on course to reach their destination safely and efficiently.

Maintaining a navigation log helps pilots to plan and execute their flight strategies effectively. It fosters situational awareness by allowing them to anticipate when they will need to change their headings or adjust for wind conditions, thereby aiding in navigation accuracy. This log not only supports the pilot in real-time decision-making but also serves as a reference for future flights.

In contrast, while monitoring fuel consumption is important for flight safety and efficiency, this task isn't the primary function of a navigation log. Similarly, though weather updates are vital during flight, they're typically not recorded in a navigation log. Additionally, providing entertainment options for passengers is unrelated to the navigation log's purpose, as it focuses solely on flight navigation and safety. Hence, the key role of the navigation log revolves around logging essential navigational details to assist the pilot throughout the flight.