Which radiotelephone signal indicates...

🔍 Key Concepts

• Distress communications under the Global Maritime Distress and Safety System (GMDSS) and traditional radiotelephone procedures • The standard radiotelephone phrases used for distress (Mayday), urgency (Pan Pan), and safety (Sécurité) • The difference between sending a distress call and acknowledging/receiving one

💭 Think About

• Look at which option uses correct, standard radiotelephone phraseology that would be used after hearing a Mayday call from another vessel. • Ask yourself: In proper procedures, what short words or phrase confirm that the message was received and understood, without re-declaring the distress itself? • Consider which options sound informal or non‑standard compared to the precise language required in distress situations.

✅ Before You Answer

• Verify which phrase is recognized in official radio procedures (ITU/USCG) as an acknowledgment, not as a distress call itself. • Check that the phrase does not invent new words around “Mayday” but instead uses the standard acknowledgement wording. • Eliminate any option that sounds like casual aviation slang (e.g., “wilco”) rather than formal maritime distress procedure.

Which radiotelephone signal indicates receipt of a distress message?

Received mayday

Mayday, roger

SOS acknowledged

Roger wilco