Due to its characteristics, it is considered by many to be the best safety equipment after the EPIRB and it is in any case complementary to this, because rescuers have a better perception when approaching shipwrecks.
Once activated, the SART enters standby mode and when it detects a valid signal from an X-band radar, it starts transmitting, sending 12-pulse cycles.
Rescuers' radar identifies shipwrecked persons by means of a distinctive line consisting of 12 points when the SART is more than 5 miles away. When the ship approaches, the points are transformed into increasingly extended circle arcs, and then become concentric circles when the SART is within a radius of one mile.
The standards require a minimum battery life of 96 hours in standby and 8 hours in transmission. The SART must be tested once a month, using the test procedure with which each SART is equipped.