How frequently must you check the heading indicator?

The heading indicator must be checked regularly to ensure its accuracy, as it can drift over time due to various factors, including mechanical errors and magnetic variations. The recommended interval for checking the heading indicator is approximately every 15 minutes during flight. This frequency allows pilots to maintain situational awareness and make necessary adjustments to their course.

Choosing this interval balances the need for accuracy with the operational demands of flying, ensuring pilots have reliable navigational data without requiring excessive interruptions to their tasks. Regular checking helps prevent navigational errors that could arise from reliance on an inaccurate heading.

Other intervals may not provide the same level of situational awareness. For instance, waiting longer than 15 minutes could potentially lead to a reliance on an inaccurate heading, increasing the risk of navigation errors. Hence, every 15 minutes is an optimal practice for maintaining confidence in the heading indication.