A crew member has a handheld VHF as backup. What are its key limitations compared to the fixed VHF?

A. Handhelds cannot access Ch 16 — they are restricted to working channels only

B. Handheld VHFs transmit on different frequencies — they cannot communicate with the fixed set or Coastguard

C. Handhelds are more powerful than fixed radios — the 5W figure is for high power mode

D. Maximum 5W (vs 25W fixed); low antenna height when held (reduces range); battery life limited (typically 8-12h active use); waterproofing ratings vary — IPX7 minimum recommended for marine use

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