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

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

B. 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"

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

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

A. To send a digitally coded distress alert containing the vessel's MMSI and position automatically to all DSC-equipped stations and the Coastguard

B. To broadcast weather forecasts to other vessels

C. To make telephone calls from the vessel to shore

D. To operate the radar system remotely

A. A GPS waypoint identifier used in coastal navigation

B. Maritime Mobile Service Identity — a unique 9-digit number identifying the vessel; without it a DSC distress alert cannot identify the vessel to rescuers

C. A VHF channel number allocated by Ofcom for distress use only

D. A vessel survey certificate number required by the MCA