Humminbird VHF255SW Accessing Channels Saved to Memory, Using the Transmit TIME-OUT Timer TOT

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10. ACCESSING CHANNELS SAVED TO MEMORY

Once channels have been saved, you can easily access them using the following procedure. Once in Memory mode, only the channels saved to memory will be accessible using the Up or Down Channel keys on the microphone handset or the CH/ENTER knob and the SCAN key on the radio base station.

To access saved channels:

1.Press and hold the HI/LOW/MEM key for 3 seconds, then release. The M icon will appear on the LCD to indicate that you are in Memory mode.

2.To scroll through saved channels, use the Up or Down Channel keys on the microphone handset or the CH/ENTER knob on the radio base station. To scan saved channels, press and release the SCAN key on the radio base station. For more information, see 12.Scanning.

3.Press the CANCEL/WX key or press and hold the HI/LOW/MEM key for 3 seconds and release to exit Memory mode and regain access to all channels.

11. USING THE TRANSMIT TIME-OUT TIMER (TOT)

When the Push-to-Talk (PTT) key on the microphone handset is held down, transmit time is limited to 5 minutes. This feature helps you to avoid unintentional transmissions. About 10 seconds before automatic transmitter shutdown, you will hear a warning beep from the speaker(s). When the Transmit Time-Out Timer takes effect, the VHF255S will automatically go into receive mode. Before transmitting again, you must release and then press the PTT key once again.

12. SCANNING

Scanning is an efficient way to locate incoming transmissions quickly over a wide selection of channels or from all the channels in a frequency band. Your Humminbird® VHF255S comes with two basic scan options, Normal and Memory Scan, with the ability to add Priority Scan to each of those modes:

•Normal Scan: If there are no channels in memory, the default mode will be Normal Scan. In Normal Scan mode, all channels in the band are scanned in sequence (for instance, 1,2, 3, 4...). After the last channel number in the band has been scanned, the sequence repeats. Normal Scan automatically and continuously searches for transmissions on the selected band. Pressing the Up/Down Channel keys on the microphone handset or turning the CH/ENTER knob on the radio base station (clockwise = up, counterclockwise = down) will change the scan direction. If a transmission (TX icon) is received, the scan stops

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Contents Operations Manual Thank YOU Operator Warnings Table of Contents Setup Menu Maintenance Troubleshooting VHF255S Introduction HOW VHF Radio WorksFeatures Overview Page Maritime Mobile Service Identity Mmsi To obtain an Mmsi assignmentGroup Mmsi VHF255S Controls Radio Base Station Front Page VHF255S Controls Radio Base Station Rear VHF255S Controls Microphone Handset Whats on the Display 10 11Indicates current channel selected Dot Matrix Indicates special conditions or radio functionsInstallation Overview Parts SuppliedRadio Base Station Watt VHF255S Fixed Mount 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 Install the Microphone Mounting Bracket Connected to the radio before powering up the radioAttach the Antenna Cable to the Radio Mount the microphone onto the bracket Attach a GPS Receiver OPTIONAL-PURCHASE Using Your VHF255S Before YOU USE Your Radio You will need to obtain an FCC license ifTo turn on the radio Adjusting Squelch Selecting a ChannelTo select a channel Selecting HIGH/LOW Power Transmitting and ReceivingSelecting U.S./INTERNATIONAL/CANADIAN Bands Selecting a Weather Channel and Turning on Weather Alert Accessing the 16/9 Priority Channels ADDING/DELETING Channels TO/FROM MemoryTo delete channels from memory Accessing Channels Saved to Memory Using the Transmit TIME-OUT Timer TOTTo access saved channels ScanningTo activate scan modes Using the Watch Monitor Modes Digital Selective Calling DSC To select a DSC call typeExit Quits the DSC Call Type menu mode DSC Call TypesTo make a Group call Group MmsiMaking a Distress Call Open the red cover over the Distress keyMayday Mayday Mayday Say that you will be monitoring ChannelMaking Individual Routine Calls Press the CH/ENTER key to initiate the call 4a. If the call is acknowledged, press PTT to talkReceiving Calls To receive a DSC callTo receive a Distress call To receive a Distress Relay call To receive an All Ships callTo receive a Group call Call data is stored in the Call LogTo receive an Individual call To receive a Geographic Area callResetting the Radio Position IndicationTo acknowledge a missed call Distress 23’20.1234 N 100’15.1002 E 0810PM UTC Setup Menu To access the Setup Menu Contact ListTo delete an entry from the Contact List Backlight Adjustment LOCAL/DISTANTContrast Adjustment To adjust the ContrastGPS/TIME Submenu GPS/TIME Submenu Manually Enter GPS Data GPS/TIME Submenu Settings Submenu GPS/TIME Settings Submenu Position Display ON/OFFGPS/TIME Settings Submenu Time Display ON/OFF GPS/TIME Settings Submenu Time Offset Local TimeGPS/TIME Settings Submenu Time Format Radio Setup Submenu Radio Setup Channel Name Display and Editing To display an existing channel nameTo edit an existing channel name entry Radio Setup Ring Volume Adjustment Radio Setup Beep Volume Adjustment Radio Setup Turning the Internal Speaker ON/OFFDSC Setup Submenu To access the DSC Setup SubmenuDSC Setup Enter Your User Mmsi Group Mmsi DSC Setup Create and Manage Group Mmsis To enter Group MMSIsTo edit an existing Group Mmsi entry To delete a Group MmsiDSC Setup Individual Reply DSC Setup DSC EnableDSC Setup Position Reply DSC Setup ResetMaintenance TroubleshootingVHF255S Doesnt Power UP Transmitting is Impossible Or High Power CAN’T be Selected No Sound from the SpeakerLOW Receiver Sensitivity Year Limited Warranty Humminbird Service Policy Returning Your Unit for Service Specifications TransmitterReceiver Marine Channels UseMarine Channels 157.350 161.950 International Marine Channels MHz 156.125 160.725 Canadian Marine Channels Commercial Fishing Only These menu choices appear when you press the DSC/MENU key Menu TreeDSC Call Type List Setup Menu Page Page Page Contact Humminbird Monday Friday 800 a.m. to 430 p.m. Central Standard Time
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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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