Marine VHF radio equipment is installed on all large ships and most seagoing small craft. It is also used, with slightly different regulation, on rivers and lakes.
Basics Steps for Using a VHF Radio
Turn on the VHF unit and adjust the squelch by turning the knob until the static stops.
Tune to channel 16, the channel monitored by the U.S. Coast Guard.
Perform a radio check to ensure your unit is functioning properly—do not use channel 16 this.
Use an "open channel" to performance the check (channels 68, 69, 71, 72 and 78A).
Turn radio to one-watt power setting, and key the microphone.
Call "radio check" three times, followed by your boat name and location.
Wait for a reply confirming someone has heard your transmission.
For general communications, always use channel 16
Types of VHF Marine Radios
A VHF marine radio may be hand-held or fixed-mount.
A fixed-mount VHF unit is permanently installed on the boat and powered by the boat’s electrical system.
The hand-held version is portable and is battery-powered, so it will still function if the boat’s battery is dead or the electrical system fails, and can be used if you are forced to abandon ship.
PKO( Practical Knowledge Onboard)
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