You suspect that a crewmember has fallen overboard during the night and immediately execute a Williamson turn. What is the primary advantage of this maneuver under these circumstances?

Correct Answer: Option C — You will be on a reciprocal course and nearly on the track-line run during the night.

Executing an immediate Williamson turn upon suspecting a night-time man overboard ensures the vessel returns precisely to its original reciprocal track-line, maximizing the probability of re-intercepting the exact geographic position where the crewmember entered the water during hours of darkness.