What is the primary purpose of DSC (Digital Selective Calling) on a VHF radio?
A. To operate the radar system remotely
B. To broadcast weather forecasts to other vessels
C. To make telephone calls from the vessel to shore
D. To send a digitally coded distress alert containing the vessel's MMSI and position automatically to all DSC-equipped stations and the Coastguard
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A. Maritime Mobile Service Identity — a unique 9-digit number identifying the vessel; without it a DSC distress alert cannot identify the vessel to rescuers
B. A GPS waypoint identifier used in coastal navigation
C. A VHF channel number allocated by Ofcom for distress use only
D. A vessel survey certificate number required by the MCA
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A. Only when in a Traffic Separation Scheme
B. At all times when at sea, unless the radio is in use on another channel — Ch 16 is the international distress, safety, and calling channel
C. Only during coastguard scheduled broadcasts at 0033 and 0233 UTC
D. Only offshore — inshore vessels are not required to monitor Ch 16
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