A DSC distress alert is accidentally transmitted. What must you do immediately?

A. Switch the radio off to prevent further alerts being sent

B. Only cancel if someone responds — unanswered alerts do not need cancellation

C. Say nothing — the Coastguard will identify it as a false alarm automatically

D. Immediately transmit a cancellation on Ch 16: "MAYDAY ALL STATIONS, ALL STATIONS, ALL STATIONS — this is [vessel name] — CANCEL DISTRESS ALERT — [time of false alert] — [position] — Out"

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

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