DSC Procedures Flashcards

What does a DSC acknowledgement from a coast station confirm?

Answer: The distress alert has been received and help is being coordinated

When a coast station acknowledges a DSC distress alert, it confirms that the alert has been received and that search and rescue coordination is being initiated.

In DSC, what is a 'position request' call used for?

Answer: Requesting another vessel to send their current GPS position

A DSC position request allows you to request another vessel to automatically send their GPS position to your radio, useful for rendezvous situations or monitoring.

Which organisation maintains the UK MMSI registration database?

Answer: Ofcom

In the UK, Ofcom is responsible for assigning and maintaining MMSI numbers for vessels. All UK vessels with DSC radios must have a registered MMSI from Ofcom.

What happens if you press the distress button on a DSC radio accidentally?

Answer: Immediately cancel by transmitting a DSC cancellation and announcing on Channel 16

Accidental distress alerts must be cancelled immediately using the DSC cancellation procedure on Channel 70, then a voice announcement on Channel 16 explaining the false alarm, to prevent unnecessary SAR deployment.

What is the purpose of the DSC 'polling' function?

Answer: Automatically requesting position updates from another vessel at set intervals

The DSC polling function allows automatic periodic position requests to another vessel, enabling a shore station or fleet manager to track vessel positions at regular intervals.

A DSC routine call is typically used for what purpose?

Answer: Setting up a voice call on a working channel with another vessel

A DSC routine call is used to establish contact with another vessel or station and agree a working channel for voice communication, similar to the process of a telephone call being connected.