🔍 Key Concepts

• VHF-DSC (Digital Selective Calling) purpose and how it sends automated distress alerts • Difference between voice distress traffic and digital distress alerts on VHF • Which VHF channel is reserved internationally for DSC distress, urgency, and safety calling

💭 Think About

• Which channel is traditionally used for MAYDAY voice calls, and is that the same as the digital alert channel? • Among the choices, which channels are commonly used for working traffic with the Coast Guard or between vessels, and which one is set aside specifically for DSC? • Think about what your VHF radio does automatically when you lift the red distress cover and press the button—what channel does that function use?

✅ Before You Answer

• Identify which channel in the list is designated only for DSC and not for routine voice communications • Confirm which channel is used for voice distress calls (MAYDAY) versus digital distress alerts • Eliminate any channels you know are typically used for CG working or intership communications rather than DSC-only use