Question 1 of 27070qZhbKYpaJw3Xqc4vbmkD

A MF/HF Distress priority DSC call may be formatted to include the following:

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Question 1 of 27070
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A MF/HF Distress priority DSC call may be formatted to include the following:

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🔍 Key Concepts

• Digital Selective Calling (DSC) structure for a distress alert on MF/HF • What identifying number is always used in DSC: MMSI vs call sign vs vessel name • Types of follow‑on communications on MF/HF GMDSS: J3E (radiotelephony) vs F1B (NBDP/telex)

💭 Think About

• First, recall what basic information every DSC distress alert MUST contain by definition. Does it ever use the vessel’s plain name or call sign as the main identifier? • Think about how follow‑on communications are conducted in the MF/HF GMDSS system: are distress follow‑ups limited to voice only, or can they also be done by NBDP/telex? • Compare each option: which one correctly combines the proper unique identifier plus required distress info plus the realistic choices for follow‑on mode on MF/HF?

✅ Before You Answer

• Verify which unique identifier DSC equipment encodes automatically: MMSI vs call sign vs vessel name • Confirm what “J3E” and “F1B” mean and which modes are actually used for follow‑on distress communications on MF/HF under GMDSS • Check that the option you choose includes all three required elements: identifier, position, nature of distress, and a valid list of follow‑on comms modes for MF/HF