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2. Select SYSTEM > UNITS > TIME > FORMAT. 3. Select 12 Hour, 24 Hour, or UTC. Configuring the Time Offset If you prefer to have your unit display the time in local time rather than Universal Coordinated Time (UTC), you need to indicate the local time offset from UTC time. When you make an adjustment for local time, “LOC” is displayed after the time instead of “UTC” on the Home screen. NOTE: The time sent when you make a DSC call is always sent in UTC format. To configure the UTC offset: 1. Press the MENU key. 2. Select SYSTEM > UNITS > TIME > OFFSET. 3. Turn the Channel knob to enter an offset number in increments of 0.5 hours. You can set the offset to a maximum of +/- 13 hours. 3 VHF 300 Series Owner’s Manual Advanced Operation Advanced Operation Select from the following options: • OK—save your changes and return to the previous screen. • CANCEL—remove your changes. Modifying the Speed Unit of Measurement You can adjust the unit of measure that is displayed for the speed calculation throughout the radio. The Speed Over Ground (SOG) on the Home screen will be displayed in the measurement you select here. 1. Press the MENU key. 2. Select SYSTEM > UNITS > SPEED. 3. Select from the following options: • KNOTS—change the unit of measure to knots. • MPH—change the unit of measure to miles per hour. • KPH—change the unit of measure to kilometers per hour. Modifying the Heading Display You can modify the heading to display either true or magnetic calculations. This heading measurement is displayed throughout the radio including Course Over Ground (COG) on the Home screen. 1. Press the MENU key. 2. Select SYSTEM > UNITS > HEADING. 3. Select from the following options: • TRUE—change the calculation to reflect true north. • MAGNETIC—change the calculation to reflect magnetic north. NOTE: If your radio is configured for NMEA 2000 communication, you cannot select TRUE or MAGNETIC. Your radio displays AUTO as the setting and displays heading data based on the information provided over the network (PGN 129026 – COG/SOG, Rapid Update). Selecting the Frequency Band You can switch between the USA, International, or Canadian frequency bands. For a list of channels available in each frequency band, see pages 36–43. NOTE: The International frequency band is the only band available for the VHF 300i and the VHF 300i AIS, unless you have the other bands enabled by an Garmin authorized dealer. 1. Press the MENU key. 2. Select MENU > CHANNEL > FREQUENCY BAND. 3. Use the Channel knob to select USA, INTERNATIONAL, or CANADA. VHF 300 Series Owner’s Manual 33 Advanced Operation Advanced Operation 1. Press the MENU key. 2. Select LANGUAGE. 3. Select the system language. Changing the Channel Names Channel names are displayed on the Home screen using nine characters. If the name is longer than nine characters, the full name scrolls across the top of the screen and then switches to the short name. You can change the nine-character name of the channel to reflect a local meaning. 1. Press the MENU key. 2. Select CHANNEL > NAME. 3. Select the channel you want to edit. 4. To edit the default name, turn the Channel knob to change the character. Press the Channel knob to select the character and move to the next character in the word. You can enter a maximum of nine characters for a channel name. 5. Select any of the following options to perform various functions: • Press ab to return to a previous character. • CANCEL—return to the previous screen without saving your changes. 6. When you have completed renaming the channel, select ACCEPT. Restoring Factory Settings You can restore the radio to utilize the factory default settings. When you perform this action, any changes you have made to the radio settings are lost, and the call logs are deleted. The directory and group entries are retained. 1. Press the MENU key. 2. Select SYSTEM > SYSTEM INFO. 3. Select RESET. 4. Select from the following options: • YES—restart the radio and restore it to the original factory default settings. • NO—return to the previous screen. Testing the System Operation 1. Press the MENU key. 2. Select SYSTEM > SYSTEM INFO. 3. Select TEST. A list of test items is displayed. 4. If necessary, use the arrow keys to scroll through the information. 3 VHF 300 Series Owner’s Manual Appendix Appendix Alarms and Messages The radio may generate the following alarms or system messages. Battery Alarm If the radio detects a voltage greater than 15.8 Vdc or less than 10 Vdc, “HIGH VOLTAGE” or “LOW VOLTAGE” is displayed on the screen. Check the wiring if any of these conditions occur. Main in Use When the primary VHF 300 series radio unit is being used, “MAIN IN USE” is displayed on the screen of all remote Garmin GHS series handsets. The screen returns to normal three seconds after the last input on the primary station. Remote handset stations cannot interrupt the primary radio unit. However, remote handset stations can interrupt the operation of other handset stations. WX (Weather Al...

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