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To send an individual call using an MMSI stored in the Contact List:

1.From the DSC Call Type List, select NEW CALL. The NEW CALL submenu will be displayed, and the cursor will point to MANUAL; any MMSI names stored in your Contact List will also appear. If you have no names stored in your Contact List, you will not be able to proceed. (See Setup Menu, Contact List for more information.)

2.Rotate the CH/ENTER knob select the MMSI number of the person from the Contact List that you want to call, then press the CH/ENTER knob again to initiate the call.

3.Then rotate the CH/ENTER knob to select the desired reply channel and press the CH/ENTER knob to enter it. The radio goes to CH 70 and the TX icon is displayed on the screen while the DSC call is being sent, then LCD displays an awaiting acknowledgment message.

4a. If the call is acknowledged, press PTT to talk.

or...

4b. If the call is not acknowledged within 16 seconds, the radio will prompt you to resend the call.

5.If you do nothing for 5 minutes, the individual call will be cancelled and the radio will revert to the original channel selected before you started the individual call.

Sending an individual call using the Call Log:

The Call Log contains the contact details for the 20 most recent incoming calls, so that you can call any of them again quickly.

1.Press the DSC/MENU key to enter DSC mode, select CALL LOG, press the Up or Down Channel keys on the microphone handset or the CH/ENTER knob on the radio base station to scroll for previous calls. The END OF LOG message will indicate the end of the Call Log list.

2.Press the CH/ENTER key to initiate the call.

3.Then rotate the CH/ENTER knob to select the desired reply channel and press the CH/ENTER knob to enter it. The radio goes to CH 70 and the TX icon is displayed on the screen while the DSC call is being sent, then LCD displays an awaiting acknowledgment message.

4a. If the call is acknowledged, press PTT to talk.

or...

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Humminbird VHF255SW manual Press the CH/ENTER key to initiate the call, 4a. If the call is acknowledged, press PTT to talk
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VHF255SW specifications

The Humminbird VHF255SW is an advanced VHF marine radio designed for reliability and performance on the water. It is built for recreational boaters, offering a combination of essential features and cutting-edge technologies that enhance communication and navigation safety.

One of the standout features of the VHF255SW is its robust 25-watt output power, which provides extended range communication, allowing users to reach distant vessels and shore stations effectively. This high power output is crucial in emergency situations or when out on open water, ensuring that skippers can maintain contact when it matters most.

The radio is equipped with a built-in Class D Digital Selective Calling (DSC) capability, which is designed to enhance safety. This feature allows users to send a distress signal automatically to the coast guard and other vessels within the vicinity, including their location coordinates. The DSC functionality can be a lifesaver in case of an emergency, providing peace of mind for boaters.

Another key characteristic of the VHF255SW is its large, high-contrast LCD display, which is easy to read even in bright sunlight or at night. The multi-color display features adjustable backlighting, ensuring users can navigate and communicate effectively in various lighting conditions. The intuitive user interface simplifies operation, making it accessible for even the most novice boater.

Additionally, the Humminbird VHF255SW is equipped with a built-in GPS receiver, which allows for enhanced positioning and mapping capabilities. This integration enables users to access real-time information, making navigation smoother and more efficient. The unit also supports navigating to specific waypoints and routes, making it an excellent tool for fishing and exploring new waters.

The radio is designed with a rugged, waterproof housing that meets IPX7 standards, meaning it can withstand submersion in water for short periods. This durability ensures that it operates reliably in rough marine conditions. The Humminbird VHF255SW also features a noise-canceling microphone for clearer communication, minimizing background noise during transmissions.

In summary, the Humminbird VHF255SW blends important marine communication capabilities with advanced technology. Its combination of high output power, DSC functionality, built-in GPS, and a user-friendly interface makes it an invaluable asset for any boating enthusiast, ensuring safety and confidence on the water. With its rugged design and reliability, the VHF255SW is a smart choice for those who demand quality and performance from their marine radio.
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