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Marine Radio revision module 6 of 10
When to use Mayday, how to structure the voice call, and what to say after sending a DSC distress alert.
10 guided lessons · 19 practice questions · 19 flashcards
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The MCA small-craft procedure defines the threshold as grave and imminent danger where assistance is required. Fire that cannot be controlled, uncontrolled flooding, a person in the water...
Read the full lesson: When to Use MaydayThe digital DSC alert is not the complete voice message. It can carry the vessel's programmed MMSI, position and selected nature of distress, but the Channel 16 voice transmission still g...
Read the full lesson: Voice Mayday StructureThe MCA procedure says that on receipt of a DSC acknowledgement, or after about fifteen seconds, transmit the distress call and message on Channel 16. The short interval is not a five-min...
Build the decision around four questions: Is a vessel or person in grave danger? Is the danger imminent rather than merely possible? Is immediate outside assistance required? Would delayi...
Read the full lesson: Mayday ThresholdBefore sailing, verify that the vessel identity is correct and the radio displays a current position and time from its connected source, or follow the set's procedure for manual entry. A...
Read the full lesson: DSC Alert and Voice MaydayThe MCA format prefers latitude and longitude. Read the latitude and longitude carefully from a current source and include north or south and east or west. If a reliable latitude/longitud...
Read the full lesson: Position and Follow-UpUse a cockpit card with the vessel name, call sign and MMSI already written in. Leave a clear space for the current position and people count. In an emergency, read the prepared identity...
Read the full lesson: The Complete Current Small-Craft MaydayWhen a DSC distress alert sounds, immediately cease any transmission that may interfere and continue a listening watch on Channel 16. Record the identity, position, time, nature and any v...
Read the full lesson: Receiving and Controlling Distress TrafficThe MCA small-craft procedure requires a received, unacknowledged distress message to be relayed to an appropriate coast station by any available means. The ITU Radio Regulations give the...
Read the full lesson: Mayday RelayITU Resolution 349 (Rev.WRC-23) says to follow the radio-screen instructions where applicable, or switch off and on after ten seconds and then follow the screen instructions where applica...
Read the full lesson: False Distress Alert CancellationAdd the complete practice layer
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