🔍 Key Concepts

• GMDSS priority levels (Distress, Urgency, Safety, Routine) • The meaning of the prowords MAYDAY, PAN-PAN, and SECURITÉ • How SOLAS and ITU Radio Regulations structure message priority at sea

💭 Think About

• Think about which category of radio traffic is intended to protect life first, then ship/safety of navigation, and only afterward routine matters. • Look at each choice and ask: does this describe a formal internationally recognized priority order, or just a type of important traffic? • Consider where navigation warnings and government messages fit compared with calls that indicate immediate danger to life or vessel.

✅ Before You Answer

• Verify the internationally recognized order: Distress vs. Urgency vs. Safety vs. Routine in GMDSS/ITU rules. • Check which answer explicitly shows a sequence of priorities, not just one type of traffic. • Confirm that the wording matches the standard prowords: MAYDAY (distress), PAN-PAN (urgency), SECURITÉ (safety).