🔍 Key Concepts

• GMDSS (Global Maritime Distress and Safety System) carriage requirements for passenger ships • Differences between satellite terminals (Inmarsat-B vs Inmarsat-C) and MF-HF SSB radio • The typical use of an aircraft transceiver on 121.5 MHz and whether that’s standard ship equipment

💭 Think About

• Which of these options is specifically mentioned in SOLAS/GMDSS as an additional requirement that applies broadly to passenger vessels, not just certain sea areas or special operations? • Think about which equipment is still commonly required and supported today vs. which systems are older, being phased out, or used in more specialized situations. • Ask yourself: does every passenger vessel reasonably need direct aircraft communication, or is the focus more on maritime distress and safety communications via satellite or HF?

✅ Before You Answer

• Verify which system is explicitly listed as a required carriage item for passenger ships in GMDSS/SOLAS, regardless of trade or sea area (as far as the exam material states). • Check whether Inmarsat-B is still a common/standard requirement, or if another Inmarsat service has become the primary text/data distress and safety link. • Confirm whether an MF-HF SSB transceiver is required on all passenger vessels, or only when operating beyond VHF/sea area A1 coverage.