Sending a DSC Distress Alert
Operating the protected distress control, choosing designated or undesignated distress, holding until transmission and checking the resulting channel and acknowledgement state.
How to prepare for the Marine Radio SRC
Build from station licensing and radio controls to disciplined voice and DSC traffic, then rehearse distress, urgency, safety, false-alert and GMDSS decisions on training equipment.
Core concepts
Concept 1
Open the protected control and, if time permits, select the nature of distress and verify valid position and time.
Exam cue: Demonstrate the sequence on training mode or non-radiating equipment only.
Concept 2
Press and hold the distress control for the set's required period until the alert is confirmed as sent; a brief accidental touch should not be treated as transmission.
Exam cue: Read the display for sent status, position, time and selected distress nature.
Concept 3
After transmission, monitor the set for acknowledgement and prepare the Channel 16 Mayday call and message rather than assuming the digital alert is sufficient.
Exam cue: Move immediately from digital alerting to the required voice and listening procedure.
Risk pitfalls and guardrails
Testing the live distress button on an operational set.
Guardrail: Do not present the 601-item authoring target as an official RYA paper and do not treat static study as a substitute for the recognised written and practical examination.
Releasing the protected button before the set confirms transmission.
Guardrail: Do not present the 601-item authoring target as an official RYA paper and do not treat static study as a substitute for the recognised written and practical examination.
Walking away after the alert without listening for acknowledgement or sending voice.
Guardrail: Do not present the 601-item authoring target as an official RYA paper and do not treat static study as a substitute for the recognised written and practical examination.
Memory anchors
Lift
Expose the protected distress control.
Select
Choose nature of distress if time safely permits.
Hold
Keep the button pressed until the set confirms the alert is sent.
Listen
Monitor acknowledgement and distress traffic.
Follow with Voice
Transmit the Mayday call and message on Channel 16 when able.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
What is the first physical action on most Class D sets when intentionally sending distress?
If time permits, what should be selected before holding the distress button?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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