What should you do if the head of the course arrow is outside the top half of the HSI during the turn?

When the head of the course arrow is outside the top half of the Horizontal Situation Indicator (HSI) during a turn, it indicates that you are not aligned with your intended course. Continuing to turn allows you to adjust your heading to bring the course arrow back towards the top of the HSI, which means you are realigning with your desired pathway.

It is essential for maintaining your course accurately and ensuring that you are on the correct track for navigation. This action helps to ensure that any deviation from your intended path can be corrected efficiently, improving situational awareness and overall flight management. By continuing your turn, you can effectively correct your heading and align back on course.

Other answers would not adequately address the need for alignment during the maneuver. Adjusting altitude or completing the turn without any changes may lead to further deviation from the intended track, while re-evaluating the course would require additional time and may not address the immediate concern of aligning the aircraft with the desired course.