If an airplane wants to direct a vessel towards another vessel in distress, what should it do?

To direct a vessel towards another vessel in distress, circling the distressed vessel at least once is the most effective method. This action helps to visually alert the crew of the vessel in distress and allows them to understand precisely where the assistance is coming from. The circle creates a clear reference point, making it easier for the crew to locate their position relative to the aircraft and the site of distress.

The circling action also signals to the vessel's crew that they need to take action, such as signaling their location or preparing to be rescued. It establishes a visual communication that would be beneficial in emergency situations, so the crew on board understands where to navigate.

In contrast, flying straight above the vessel or descending rapidly may not provide enough information or visual guidance to the crew below. Simply hovering above could also be confusing without indicating the next steps to be taken, which is why circling is the preferred method to guide a vessel effectively.