🔍 Key Concepts

• GMDSS Sea Areas A1–A4 and how they are defined by coverage • Which Sea Areas require MF/HF or satellite (INMARSAT) for distress and safety communications • The difference between equipment that fully vs partially satisfies a carriage requirement

💭 Think About

• First, recall what kind of radio coverage defines Sea Area A2, A3, and A4. Which of these areas is associated with satellite coverage instead of just coastal MF coverage? • Think about which piece of equipment in the question (INMARSAT or HF SITOR) is linked with that area’s normal distress and safety system. • Look closely at the words “partially satisfies” vs **“satisfies in full.” In which Sea Area is this combination intended to cover the main distress requirement, and where is additional equipment still needed?

✅ Before You Answer

• Be sure you know the formal definitions of Sea Area A2, A3, and A4 under GMDSS, not just a rough idea. • Confirm which areas rely on INMARSAT satellite systems for distress alerting, and which ones rely mainly on MF/HF coast station coverage. • Check whether the option you choose says the equipment partially or fully satisfies the requirement, and match that carefully with the Sea Area’s defined coverage.