10.Release the PTT key and listen for a response. If you do not get a response, repeat step 9 until you do.

11.If you must abandon ship without receiving a response, and you have time, go back to step 1, and initiate an automatic distress call that will broadcast the ABANDONING message.

16.MAKING INDIVIDUAL ROUTINE CALLS

You can make an individual call, either to a ship or to a coast station.

To send an individual, manual call:

1.From the DSC Call Type List, select NEW CALL The New Call submenu will be displayed, and the arrow will point to MANUAL.

2.Press the CH/ENTER knob again to display the ENTER MMSI screen. Enter the MMSI number using the CH/ENTER knob; when MMSI entry is complete, press the CH/ENTER knob to enter it.

3.Then rotate the CH/ENTER knob to select the working channel (the channel on which you want to be called back) and press the CH/ENTER knob to enter it. The working channel will show up in the Acknowledge message of the called radio.

4.The radio summarizes the call details and asks for confirmation to send the call by displaying >SEND on the LCD. (You must confirm many of the DSC commands before the radio will execute them.)

5.Press the CH/ENTER knob again to send the call. The radio goes to Channel 70 and the TX icon is displayed on the screen while the DSC call is being sent, then the LCD displays an awaiting acknowledgment message. If you wish to cancel the call, rotate the CH/ENTER knob until >CANCEL is highlighted, then press the CH/ENTER knob again to cancel the call or press and release the 16/9 key.

6a. If the call is acknowledged, press PTT to talk.

or...

6b. If the call is not acknowledged within 16 seconds, the radio will prompt you to resend the call.

7.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.

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Humminbird VHF255SW manual Making Individual Routine Calls
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VHF255S, 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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