🔍 Key Concepts

• GMDSS Sea Areas and what defines Sea Area A1 • Required distress alerting methods for ships that never leave Sea Area A1 • Differences between VHF DSC, MF/HF DSC, and older 2182 kHz systems

💭 Think About

• Ask yourself: In Sea Area A1, what shore facilities are assumed to be available at all times? • Consider which option mentions equipment that directly matches the GMDSS design for A1-only operation. • Which choices describe equipment intended for longer-range (beyond VHF) communications rather than short-range coastal coverage?

✅ Before You Answer

• Verify how Sea Area A1 is officially defined in GMDSS regulations (coverage by at least one VHF coast station with DSC). • Check which type of DSC (Digital Selective Calling) is specifically tied to Sea Area A1 requirements. • Confirm whether older 2182 kHz radiotelephone/automatic alarm systems are still considered GMDSS-compliant for initial distress alerting.