A Search And Rescue Transponder is a self contained waterproof transponder intended for emergency use at sea.
SART is the main means in the GMDSS for locating ships in distress or their survival craft, and it is mandatory for all ships to have it onboard
A SART operates in the 9 GHz (3cm or X-band radar frequency)
These response signals will be seen on the ship or Aircraft radar screen as line of 12 dots, This unique radar signal is easily recognized and allows the rescue vessel or Aircraft to locate the survival craft
