ATPL EASA Radio Navigation Practice Exam - Practice Test & Study Guide

The primary function of a navigation log is to record headings, distances, and times for flight planning. This document plays a crucial role in ensuring that pilots have a clear and structured approach to navigation during a flight. It helps in calculating the flight path along the selected route, allowing pilots to maintain awareness of where they are and what adjustments need to be made.

By detailing specific headings, distances, and estimated times of arrival or updates during the journey, the navigation log aids in efficient route management and assists pilots in making informed decisions. This is essential for maintaining safety and optimizing flight performance, especially under changing conditions such as weather variations or air traffic control instructions.

In contrast, other options like recording passenger information, documenting weather conditions, or tracking maintenance issues do not serve the primary objective of navigation directly and focus on different aspects of operational or safety management within aviation.