Which of the following is a prohibited transmission under ITU Radio Regulations and UK law?

A. Using low power (1W) when the other vessel requests high power (25W)

B. Making a radio check on a working channel rather than Ch 16

C. Calling a vessel by name rather than by MMSI on Ch 16

D. Transmitting a false distress alert, using obscene language on air, broadcasting music on marine VHF, transmitting without a licence, or impersonating another vessel's call sign

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