How is a distress message normally initiated through INMARSAT?

Official USCG Answer & Rule Citation

Correct Answer: Option C — Certain INMARSAT units have a dedicated key that can be pressed for immediate action, while other systems provide menu-driven features.

Inmarsat terminals use dedicated hardware distress buttons for immediate emergency alerts, while older or auxiliary systems rely on software menu-driven navigation sequences to format and transmit distress traffic in accordance with GMDSS performance standards.

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