Which of the following statements concerning...

🔍 Key Concepts

• GMDSS (Global Maritime Distress and Safety System) basic responsibilities of the certified radio operator • How DSC guard channels are selected and monitored on VHF, MF, and HF equipment • Requirements for updating the ship’s position in GMDSS equipment (think about time interval and why it matters)

💭 Think About

• Ask yourself: Does the radio operator still have responsibility for selecting any guard channels, or is everything fully automatic on all bands? Consider VHF, MF, and HF separately. • Think about why the GMDSS console needs an updated GPS position. In an emergency, how current must that position be to be useful? Would 4 hours be considered too long, too short, or reasonable? • Consider who approves different types of GMDSS equipment. Is Inmarsat the approval body for all equipment, or is its role more limited to certain satellite systems?

✅ Before You Answer

• Verify what the GMDSS Radio Operator’s duties are with respect to selecting/setting DSC watch channels on VHF, MF, and HF (are any bands automatic-only?). • Check the official requirement for how often the vessel’s position must be updated in GMDSS/DSC equipment; focus on the specific time interval given in the rules or manuals. • Confirm whether all GMDSS equipment must be type accepted by Inmarsat, or whether acceptance/approval depends on the service (satellite vs. non-satellite) and relevant authorities.

Which of the following statements concerning DSC equipment is true?

The GMDSS Radio Operator is not responsible for properly selecting HF DSC guard channels because they are done automatically by the watch receiver.

All equipment must be type accepted by Inmarsat.

The vessel 's navigational position must be updated , either automatically or manually , no less often than every four ( 4 ) hours .

The GMDSS Radio Operator is responsible for properly selecting VHF & MF DSC guard channels but the HF frequencies are done automatically by the watch receiver.

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🔍 Key Concepts

💭 Think About

✅ Before You Answer