What does an Inmarsat satellite terminal provide that a VHF radio cannot?

A. Global two-way voice, data, and email communications with no range limitation — ideal for offshore/ocean passages where VHF range is inadequate. Also enables long-range distress alerting through the GMDSS Inmarsat-C system

B. Inmarsat is available only in Sea Area A1 within 50nm of the coast

C. Inmarsat replaces VHF entirely — vessels fitted with it do not need a VHF radio

D. Inmarsat only provides one-way weather downloads — it cannot transmit voice

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