What is the function of the SART device?

The SART (Search and Rescue Transponder) plays a critical role in maritime safety, specifically for locating vessels in distress. When activated, the SART emits radar signals that allow search and rescue teams to pinpoint the location of the distressed vessel. This device is particularly useful in emergency situations, such as during a man overboard scenario or when a vessel is sinking.

The radar signals from the SART are designed to be picked up by nearby radar systems on rescue vessels or aircraft, effectively marking the position of the distressed vessel on the radar screen. This functionality significantly enhances the chances of a successful rescue operation by providing precise location information.

While communication between ships, measuring distances, and monitoring weather conditions are important aspects of maritime operations, they do not pertain to the primary purpose of the SART device. Thus, the correct answer highlights the SART's essential role in search and rescue scenarios.