What can the operator do to adjust the...

What can the operator do to adjust the audible alarm?

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🔍 Key Concepts

• GMDSS VHF DSC (Digital Selective Calling) alarm behavior for different message priorities (Distress, Urgency, Safety, Routine) • What the operator is allowed to change (volume/tones/acknowledgment) versus what is mandatory by regulation • Which types of alerts on a DSC radio must not be able to be turned off for safety reasons

💭 Think About

• Think about why the GMDSS rules require strong audible alarms for certain messages. Which message priorities are considered the most critical to safety of life at sea? • Ask yourself: Is it reasonable or permitted for the operator to completely silence the radio for those most critical messages? • Consider whether all four priorities (Distress, Urgency, Safety, Routine) are treated exactly the same, or whether some must always trigger an audible alarm that cannot be disabled.

✅ Before You Answer

• Verify which message priorities are life‑critical and therefore must generate a strong audible alarm • Check whether Distress and Urgency can legally have their alarms disabled or silenced by the operator • Confirm if the operator’s control over the audible alarm (e.g., volume, muting) applies equally to all four priorities or if there is an exception for the highest priorities

🔍 Key Concepts

💭 Think About

✅ Before You Answer