Your ship received a Distress relay from a...

🔍 Key Concepts

• DSC (Digital Selective Calling) distress relay on MF 2187.5 kHz and what it is used for • Difference between DSC distress/relay frequency (2187.5 kHz) and voice radiotelephony distress frequency (2182.0 kHz) • Correct procedure after receiving a coast station distress relay: what you listen on, and on which frequency you make any voice call

💭 Think About

• Ask yourself: Is 2187.5 kHz used for digital calls, voice calls, or both? How does that affect what kind of transmission you make next? • When a coast station sends a distress relay, what is your ship normally expected to do immediately afterward: re‑transmit the DSC call, switch to a voice frequency, or call back on DSC? • Which frequency is designated internationally for MF voice distress traffic, especially associated with 2187.5 kHz DSC alerts?

✅ Before You Answer

• Verify which frequency (2187.5 vs 2182.0 kHz) is officially designated for DSC-only use versus radiotelephony (voice) distress and safety traffic. • Confirm whether ships are normally required or even allowed to retransmit DSC distress relays originating from a coast station. • Make sure the action you choose involves the correct mode (DSC vs voice) on the correct paired distress frequency for follow‑up communications.

Your ship received a Distress relay from a coast station on DSC frequency 2187.5 kHz. What action should the watch officer take?

Retransmit the DSC call on 2187.5 kHz to other vessels in the vicinity to assist in SAR operations.

Monitor 2182.0 kHz to determine if there are any genuine Distress communications .

Transmit a voice “Mayday Relay” call on 2187.5 kHz to other vessels in the vicinity.

Transmit a voice “Mayday Relay” call on 2182.0 kHz to other vessels in the vicinity.

🔍 Key Concepts

💭 Think About

✅ Before You Answer