🔍 Key Concepts

• False distress alert procedures in GMDSS/VHF • The role of VHF Channel 16 as the international distress, safety, and calling frequency • The difference between DSC (Digital Selective Calling) on Ch-70 and voice announcements on working channels

💭 Think About

• After a false distress alert goes out, who needs to hear your cancellation message, and which channel are they most likely monitoring? • Is the cancellation normally done by DSC, by voice, or can it be a combination—and which method is emphasized for an immediate "all ships" explanation? • Which channel is specifically designated for distress and safety voice traffic, not just digital calls or port-operations traffic?

✅ Before You Answer

• Verify which channel is designated internationally for distress, safety, and calling (voice) on VHF. • Check whether Ch-70 is used for voice or only for DSC digital signaling. • Confirm which channels (13, 22A, 16) are normally used for bridge-to-bridge, coast guard working, and distress/safety communications.