Which GMDSS system utilizes terrestrial...

Question 1 of 29218J873Kdo8aTOG2ZCLTHfp

Which GMDSS system utilizes terrestrial radio techniques?

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Question 1 of 29218

Q

Which GMDSS system utilizes terrestrial radio techniques?

🔍 Key Concepts

• GMDSS (Global Maritime Distress and Safety System) structure: space-based (satellite) vs terrestrial (land-based radio) components • Difference between Inmarsat services and traditional marine radio (VHF/MF/HF with DSC) • What systems are actually part of GMDSS vs supporting navigation (like GPS)

💭 Think About

• First separate the options into satellite systems, navigation-only systems, and traditional radio systems. Which group uses land-based radio stations? • Ask yourself: Which of these systems depends on satellites in orbit, and which one uses shore radio stations and ship radios talking directly to each other? • Which choice is clearly not a communication system, but rather a positioning/navigation aid?

✅ Before You Answer

• Identify which choices are satellite-based (Inmarsat variants, F-77) and remove them when thinking about terrestrial radio. • Confirm that GPS is not a GMDSS communication system but a positioning system, so be cautious about selecting it. • Look for the option that explicitly names VHF/MF/HF with DSC (Digital Selective Calling), which is the classic terrestrial radio part of GMDSS.