McMurdo S4 Rescue SART: The McMurdo S4 Rescue SART (Search and Rescue Transponder) is an essential device for enhancing search and rescue operations. It works by emitting distress signals that are detected by rescue teams and nearby vessels, allowing for the swift location of distressed vessels or individuals. The S4 Rescue SART operates on AIS frequencies, making it compatible with other modern rescue equipment. By improving visibility during emergency situations, it plays a critical role in maritime safety and quick response efforts.