🔍 Key Concepts

• GMDSS DSC distress alert procedures and the idea of "follow-on" communications • Which frequencies are used for watchkeeping vs. for voice (radiotelephone) follow‑up to a DSC alert • The difference between DSC calling channels (like VHF Ch 70) and associated working channels/frequencies

💭 Think About

• When a DSC distress alert is received, does the operator continue to monitor the DSC channel, or do they prepare to communicate on a different mode/frequency? • Look at each choice and ask: is this about staying on the DSC alert channel, or about moving to the channel where the actual distress conversation will occur? • Which option incorrectly assumes that "no human action" is needed after receiving a distress alert?

✅ Before You Answer

• Verify which channel/frequency is designated for DSC watchkeeping (e.g., VHF Ch 70) and which is for radiotelephone distress traffic (e.g., VHF Ch 16). • Check GMDSS procedures: after DSC distress alert, what is the standard step for establishing voice or NBDP follow‑on communications? • Eliminate any option that would leave the operator not listening where the actual distress traffic will be conducted.