A Ch-70 DSC Distress alert is received. What...

🔍 Key Concepts

• DSC (Digital Selective Calling) Distress alerts on VHF Ch-70 and the required follow‑up on voice channel 16 • Role of all ships in range when a Distress alert is received (GMDSS obligations) • Difference between acknowledging to the ship and listening/relaying for the Rescue Coordination Center (RCC)

💭 Think About

• After a Ch-70 DSC Distress alert sounds on your set, what voice channel is associated with that alert, and why is listening there important? • In a real emergency, which is more important initially: immediately talking back to the vessel, or making sure you correctly monitor and understand the distress traffic? • Should an ordinary ship normally send a DSC ‘receipt’ back to the distress vessel, or is that function primarily for coast stations / RCC under GMDSS procedures?

✅ Before You Answer

• Verify what standard follow‑up channel is used after a VHF Ch-70 DSC Distress alert (think: routine distress working channel). • Check whether all ships that receive the alert must maintain watch and be ready to assist, not just coast stations. • Confirm who is normally authorized to acknowledge a DSC distress alert by DSC (ship vs. coast station) before deciding whether to transmit anything.

A Ch-70 DSC Distress alert is received. What action should be taken?

Silence the alarm, review the message and set up watch on Ch-16 to listen for Mayday communications .

Silence the alarm and immediately call the master for further instructions.

Review the incoming message information but take no action unless requested to do so by the RCC.

Use DSC to immediately notify the vessel their Distress has been received.

🔍 Key Concepts

💭 Think About

✅ Before You Answer