🔍 Key Concepts

• GMDSS (Global Maritime Distress and Safety System) basic channels • Difference between distress & calling versus digital selective calling (DSC) • Common working channels used by ships and coast stations

💭 Think About

• Think about what channel you are taught to monitor at all times for emergency voice traffic. • Which channel is internationally recognized for MAYDAY, PAN-PAN, and SECURITÉ voice calls? • Which of the options is actually used for digital selective calling (DSC) rather than voice distress?:

✅ Before You Answer

• Identify which option is the international voice distress and calling channel. • Identify which option is the DSC distress channel (used for digital alarms, not voice). • Eliminate channels typically used as U.S. Coast Guard working or non-commercial working channels.