What action should be taken if a Distress...

Question 1 / 27070XacHtq0AP77f1JMrUwoZ

Question 1 of 27070XacHtq0AP77f1JMrUwoZ

What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

Question 1 of 27070

What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

🔍 Key Concepts

• DSC distress alerting procedures in the GMDSS (Global Maritime Distress and Safety System) • Relationship between a DSC distress channel and the associated radiotelephony distress working frequency • When ships should acknowledge via DSC versus switching to a voice distress frequency

💭 Think About

• Ask yourself: after receiving a DSC distress alert on an HF (12 MHz) DSC channel, what is normally the next step for communication with the ship in distress? • Consider whether you should stay on a DSC frequency or move to a radiotelephony (voice) frequency to handle distress traffic. • Think about which emission type (J3E vs F1B/J2B) is used for voice and which is used for data/DSC.

✅ Before You Answer

• Verify which option uses a voice (radiotelephony) emission suitable for MAYDAY traffic. • Check which frequency in the options corresponds to the 12 MHz distress working frequency for radiotelephony, not the DSC calling frequency itself. • Confirm that ships at sea normally do not acknowledge HF DSC distress alerts by DSC unless specifically required; instead, they listen and respond on the linked voice distress frequency.

Question 1 of 27070

What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

Use DSC to acknowledge/relay the alert using the 12 MHz DSC frequency.

Do nothing. Ship is too far away to render assistance.

Set the transceiver to 12290 .0 kHz simplex J3E emission.

Set the transceiver to 12520.0 kHz simplex F1B/J2B emission.

Question 1 / 27070XacHtq0AP77f1JMrUwoZ

Question 1 of 27070XacHtq0AP77f1JMrUwoZ

What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?

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Question 1 of 27070

What action should be taken if a Distress alert is received on the 12 MHz DSC frequency?