Learn everything you need to know about Search and Rescue Transponders (SARTs), including radar SARTs, AIS SARTs, their working principles, installation, maintenance, and carriage requirements for various vessels. A standard SART 9 GHz radar transponder, produced by Jotron, on board a Norwegian ferry. The unit is 251 mm high. A search and rescue transponder ( SART ) is a self-contained, waterproof transponder intended for emergency use at sea. These devices may be either a radar- SART , or a GPS -based AIS- SART (automatic identification system SART ). The radar- SART is used to locate a survival craft or distressed vessel by creating a series of dots on a rescuing ship's radar display. A SART will only ... SART -Search and Rescue Transponder SEANAV MARINE is a leading supplier of marine SART , providing high-quality products at competitive prices. SART which we supply are designed to meet the latest international standards and are backed by a comprehensive warranty.