Maritime Questions › Src Vhf

Two vessels are coordinating a tow in open water. Which channel should they use for coordination communications?

A. Channel 37 — the marina channel
B. Channel 6 — the designated intership safety channel; clear of port operations and not blocking Ch 16
C. Any available channel the skippers agree upon, including Ch 16
D. Channel 16 — the distress channel, which is appropriate for all safety communications
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What is the primary purpose of DSC (Digital Selective Calling) on a VHF radio?
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
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What is an MMSI number and why must it be programmed into a DSC radio before it is used?
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
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