How often should you check the heading indicator and align it with the magnetic compass?

The frequency of checking the heading indicator and aligning it with the magnetic compass is crucial for maintaining accurate navigation. Regular checks ensure that any errors due to precession or drift are caught early, allowing for adjustments before they significantly affect the flight path.

Choosing to align the heading indicator every 15 minutes is based on the operational standards that prioritize safety and precision in navigation. This interval provides a balance between ensuring accuracy and maintaining operational efficiency. Frequent checks help pilots stay aware of any deviations, which can be particularly important when flying in conditions where visual references may be limited.

Different options suggest varying intervals for checks. While 30 minutes might seem reasonable, it could allow for more significant errors to accumulate, leading to navigation challenges. The option stating to check whenever it precesses 15° is indeed crucial for corrective action, but it might not be as proactive as a time-based interval for regular consistency. Thus, a time-based approach every 15 minutes is a standard practice to ensure continuous alignment with the magnetic compass and uphold navigational integrity.