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. 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

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

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

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