167. How can vessel personnel detect the operation of a SART in its vicinity?

A unique two-tone "warbling" signal heard on VHF-FM Ch-70.
It will activate an AIS new signal alarm on the AIS receiver.
The SART signal appears as a target that comes and goes -- due to the effect of heavy swells on a SART.
A unique 3-cm signal consisting of a 12-dot pattern radiating outward from a SART's position along its line of bearing .

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