GMDSS: Element 7R

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

Tip: press A-D to answer