🔍 Key Concepts

• DSC (Digital Selective Calling) distress alert requirements – what data must be transmitted automatically in an emergency • GPS-to-radio NMEA sentence interface – how the radio knows your position and time from the GPS • Difference between seeing raw GPS data (lat/long/speed) versus a simple GPS status/confirmation indicator on the radio

💭 Think About

• In a real distress, what information must the DSC radio already have from the GPS before you ever push the red button? • Which option best checks that the GPS data stream is continuously and correctly received by the radio, not just that the radio can transmit something? • Which method would an installer use during setup, without involving other vessels or actually sending a distress alert?

✅ Before You Answer

• Verify which choice shows that the radio is actually receiving and decoding GPS position sentences from the GPS unit. • Check whether any option would be unsafe or improper to use as a test method during installation. • Consider which display indication would be specifically designed to confirm valid GPS input, not just any position information.