Humminbird VHF255SW - Manual (Page 14)

VHF255S CONTROLS - RADIO BASE STATION REAR
The following drawing shows the Humminbird® VHF255S connections on the rear of
the radio:
Power Input: Allows you to connect the radio to the boat’s 12 VDC power system.
External Speaker: Allows you to connect the radio to an optional-purchase external
speaker.
External GPS: Allows you to connect the radio to an optional-purchase GPS receiver to
acquire the position of your vessel and the GMT time.
Antenna Jack: Allows you to connect a suitable antenna to your marine VHF radio.
External GPS Antenna Jack
External Speaker
Power Input
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