Definition
An approved alternative to the 9 GHz radar SART under SOLAS. Once activated it transmits bursts of position reports, normally eight messages per minute, using its own GNSS receiver and an identity beginning with 970. Receivers display it with a distinct SART symbol and raise an alarm. Antenna height governs range, so mounting it as high as practicable in the liferaft matters. Battery endurance is at least 96 hours.
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