If you need to contact a vessel quickly in an emergency, which system on a VHF radio facilitates this?

• A. DSC (Digital Select Calling).
• B. GPS navigation.
• C. Weather alert channel.
• D. AM/FM analog channel.

Answer: (A)

Digital Select Calling is the feature that makes emergency contact fastest on a VHF radio. DSC sends a digital distress or safety message directly to a specific vessel or to all DSC-equipped stations, so responders can be alerted immediately. If your GPS is connected, your position can be included in the distress signal, helping rescuers locate you quickly. The system operates on the DSC channel (channel 70), ensuring the call is prioritized and reaches the right people without needing a voice conversation.

GPS navigation is for determining your location, not for contacting others. Weather alert channels provide weather information, not direct emergency contact. AM/FM analog channels aren’t used for rapid emergency distress signaling on marine radios.