Humminbird VHF255SW manual VHF255S Introduction, HOW VHF Radio Works

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VHF255S INTRODUCTION

The Humminbird® VHF255S represents state-of-the-art high tech VHF radio engineering, and is skillfully designed and constructed with the finest components. It is constructed to commercial- grade standards to give you clear, reliable communication.

HOW VHF RADIO WORKS

The most popular method of communicating with other boats is via very high frequency (VHF) radio. In technical terms, this is similar to the way that commercial radio stations transmit. VHF equipment is relatively simple, and can therefore be compact and low cost.

To ensure that maritime users do not cause interference for other radio users, a part of the radio spectrum has been allocated specifically to this group of users. These reserved frequencies have been numbered, for example, Channel 16 (usually abbreviated Ch16) actually refers to a frequency of 156.800 mHz.

Because radio does not recognize geographic or political boundaries, and to make sure that boats traveling on international voyages can always communicate, the VHF marine band is the same worldwide. There are 55 international marine channels, a similar number of private channels (allocated on a local basis to commercial organizations) and some other unique national channels.

The United States and Canada employ a slightly different application of marine channels, using the same frequency but allocating more simplex (one-way) rather than duplex (two-way) channels.

National channels include WX (weather) channels in the U.S., fishing channels in Norway and the marina channels M and M2 in the U.K. To make sure that your radio is fitted with the correct local channels, be sure to purchase type-approved equipment for the country of intended use.

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Contents Operations Manual Thank YOU Operator Warnings Com Table of ContentsSetup Menu Maintenance Troubleshooting HOW VHF Radio Works VHF255S IntroductionFeatures Overview Page To obtain an Mmsi assignment Maritime Mobile Service Identity MmsiGroup Mmsi VHF255S Controls Radio Base Station Front Page VHF255S Controls Radio Base Station Rear VHF255S Controls Microphone Handset 10 11 Whats on the DisplayDot Matrix Indicates special conditions or radio functions Indicates current channel selectedWatt VHF255S Fixed Mount radio base station Installation OverviewParts Supplied Radio Base StationMicrophone handset Microphone HandsetCables Connections Overview Decide Where to Install the Radio Base Station Install the Radio Base Station Radio Base Station Mounting Screws Gimbal Knobs Bracket Dash Nuts Recessed mounting brackets Connected to the radio before powering up the radio Install the Microphone Mounting BracketAttach the Antenna Cable to the Radio Mount the microphone onto the bracket Attach a GPS Receiver OPTIONAL-PURCHASE Using Your VHF255S You will need to obtain an FCC license if Before YOU USE Your RadioTo turn on the radio Selecting a Channel Adjusting SquelchTo select a channel Transmitting and Receiving Selecting HIGH/LOW PowerSelecting U.S./INTERNATIONAL/CANADIAN Bands Selecting a Weather Channel and Turning on Weather Alert ADDING/DELETING Channels TO/FROM Memory Accessing the 16/9 Priority ChannelsTo delete channels from memory Scanning Accessing Channels Saved to MemoryUsing the Transmit TIME-OUT Timer TOT To access saved channelsTo activate scan modes Using the Watch Monitor Modes To select a DSC call type Digital Selective Calling DSCDSC Call Types Exit Quits the DSC Call Type menu modeGroup Mmsi To make a Group callOpen the red cover over the Distress key Making a Distress CallSay that you will be monitoring Channel Mayday Mayday MaydayMaking Individual Routine Calls 4a. If the call is acknowledged, press PTT to talk Press the CH/ENTER key to initiate the callTo receive a DSC call Receiving CallsTo receive a Distress call To receive an All Ships call To receive a Distress Relay callTo receive a Geographic Area call To receive a Group callCall data is stored in the Call Log To receive an Individual callPosition Indication Resetting the RadioDistress Setup Menu Contact List To delete an entry from the Contact List LOCAL/DISTANT Backlight AdjustmentTo adjust the Contrast Contrast AdjustmentGPS/TIME Submenu GPS/TIME Submenu Manually Enter GPS Data GPS/TIME Settings Submenu Position Display ON/OFF GPS/TIME Submenu Settings SubmenuGPS/TIME Settings Submenu Time Offset Local Time GPS/TIME Settings Submenu Time Display ON/OFFGPS/TIME Settings Submenu Time Format Radio Setup Submenu To display an existing channel name Radio Setup Channel Name Display and EditingTo edit an existing channel name entry Radio Setup Ring Volume Adjustment Radio Setup Turning the Internal Speaker ON/OFF Radio Setup Beep Volume AdjustmentTo access the DSC Setup Submenu DSC Setup SubmenuDSC Setup Enter Your User Mmsi Group Mmsi To enter Group MMSIs DSC Setup Create and Manage Group MmsisTo delete a Group Mmsi To edit an existing Group Mmsi entryDSC Setup DSC Enable DSC Setup Individual ReplyDSC Setup Reset DSC Setup Position ReplyTroubleshooting MaintenanceVHF255S Doesnt Power UP No Sound from the Speaker Transmitting is Impossible Or High Power CAN’T be SelectedLOW Receiver Sensitivity Year Limited Warranty Humminbird Service Policy Returning Your Unit for Service Transmitter SpecificationsReceiver Use Marine ChannelsMarine Channels 157.350 161.950 International Marine Channels MHz 156.125 160.725 Canadian Marine Channels Commercial Fishing Only Menu Tree These menu choices appear when you press the DSC/MENU keyDSC Call Type List Setup Menu WwwNOTES..reelschematic..com WwwNOTES..reelschematic..com WwwNOTES..reelschematic..com Monday Friday 800 a.m. to 430 p.m. Central Standard Time Contact Humminbird
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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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