Humminbird DC 25 manual LCD Screen, Operating the VHF Radio

The microphone button controls whether you are receiving or transmitting. Depress the microphone button and speak clearly into the selected channel. When the microphone button is not depressed, the radio remains ready to receive signals.

Note: Your DC-25 complies with new FCC regulations, which require the radio to disable the transmitter after 3 minutes of continuous transmission. This should only occur if the microphone button is stuck down. During this time, the speaker will emit a repeated beeping tone and the channel number on the LCD will flash. Click your microphone button several times in an attempt to free the stuck button. If the button doesn’t clear, or if the problem occurs again, please return the radio to the Humminbird factory or to an authorized service center.

THE LCD SCREEN

The Humminbird VHF radio’s LCD screen keeps you informed of the current state of the communications set-up.

HI or LO indicates whether you are set to transmit at the maximum legal wattage for the current channel, or at the lower 1 watt of power.

The T transmission symbol blinks when you are transmitting (that is, when the microphone button is depressed).

The large numeral appearing at the center of the screen shows the current channel selection.

SCAN appears when the scan function is enabled.

DUAL appears when the dual watch function is enabled.

WX illuminates when you are receiving in the Weather frequency band.

USA illuminates when the USA frequency band is selected.

OPERATING THE VHF RADIO

The controls, switches, and displays on the Humminbird VHF radio function as described in the previous pages. The following examples are provided to further acquaint you with communication operations.