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Information in this document is subject to change without notice. Garmin reserves the right to change or improve its products and to make changes in the content without obligation to notify any person or organization of such changes or improvements.
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WX (weather) channels. 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 dealer. The VHF 300 series radios have many enhanced features, including those listed in the following table.
Introduction Relocatable speaker and microphone Supports Garmin GHS full-function ™ handsets Hailer and foghorn output at 30 watts with automatic and manual foghorn signals and adjustable, base-fog frequencies Two-way hailer functionality for listening back when connected to a compatible horn...
Introduction ...i Manual Conventions ... Getting Started ...1 Garmin GHS Series Handsets ... Garmin GHS Series Handset Display ... Tips ... Basic Operation ...4 Turning the Radio On and Off ... Adjusting the Volume ... Adjusting the Squelch ... Selecting Channels ...
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Introduction Advanced Operation ...29 NMEA 0183 and NMEA 2000 ... Modifying the Operating Settings ... Appendix ...35 Alarms and Messages ... Channel Lists ... Specifications ... Caring for the Unit ... Index ...51 VHF 300 Series Owner’s Manual...
Garmin GHS Series Handsets Use a Garmin GHS handset to operate all VHF 300 model radios. PTT (Push-to-talk)—press to exit the current menu and return to the Home screen to begin broadcasting. DISTRESS—lift the spring-loaded door and press the DISTRESS key to start a Digital...
Getting Started Garmin GHS Series Handset Display The Home screen is the most-viewed screen in the system. It displays all of your current information, such as the current channel, the frequency band, and the channel name. System-status icons DISTRESS Channel REPEAT Channel—current working channel.
Tips Keep the following tips in mind when using your radio or handset: • Press and release the screen. CLEAR • Press the key to view the previous screen. • Select to save your changes and return to the Home screen. •...
Basic Operation Turning the Radio On and Off IMPORTANT: To use the DSC capabilities of your radio, you must first enter an MMSI number. See page 14 for more information. To turn on the radio, press and hold the (International models). If you have not entered a Mobile Maritime Safety Identity (MMSI) number, you must press the press and hold the 16/9...
Bypassing the LO (1 W) Transmission Power Setting In the USA frequency band, transmissions on Channels 13 and 67 are required to be low- power (1 watt) by default. You can bypass this power setting by pressing the during transmission. 1.
Basic Operation To remove the saved status from a channel: 1. Select SCAN. 2. Turn the Channel knob to access different channels. 3. Select Scanning Saved Channels 1. Select SCAN. 2. Select SAVED. NOTE: This scan does not include Channel 16 unless you saved Channel 16 to memory. However, you can select +CH16 16, 32, 16).
Monitoring Two Channels (Dual Watch) Dual watch allows you to cycle between monitoring the current channel you have selected and Channel 16. 1. Select MENU > CHANNEL 2. Select DUAL. “DUAL WATCH”, the currently selected channel, and Channel 16 are displayed on the screen—for example, “DUAL WATCH CH: 75 + 16”.
Basic Operation Switching Between 1 W and 25 W Transmitting Modes You can control the transmitting power of the radio. There are two options: LO (1 W) and HI (25 W). LO is typically used for local transmissions, while HI is typically used for distance and distress transmissions.
Using the Intercom The intercom is part of the Public Address (PA) system of your radio. You can use multiple handset stations as an intercom system for two-way communication. Use the radio handset to initiate communication with a remote handset station, and use a remote handset station to initiate communication with the radio handset.
Basic Operation To operate the hailer: 1. Select > HAILER. Sounds received through the horn can be heard through the radio speaker. 2. Press and hold the 3. Turn the Channel knob to adjust the horn volume. 4. Release the key to listen.
3. Press the key on the handset to sound the horn. The horn will stop when you release the key. 4. Turn the Channel knob to adjust the volume of the horn. 5. Select EXIT to return to the Home screen. Adjusting the Sound Frequency of the Foghorn You can increase or decrease the sound frequency of the foghorn.
Europe. Your Garmin dealer can program your VHF 300i or VHF 300i AIS to use ATIS if you plan to use your radio on waterways that are within the bounds of the Regional Arrangement Concerning the Radiotelephone Service on Inland Waterways (the Basel Agreement).
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IMPORTANT: Use caution when entering your ATIS identification number because you can only enter it once. If you need to change your ATIS identification number after entering it, you must take the radio to your Garmin dealer for reprogramming. 1. Press the MENU key.
Digital Selective Calling Digital Selective Calling Digital Selective Calling (DSC) is a key component of the Global Maritime Distress and Safety System (GMDSS). DSC provides VHF radios with the ability to place and receive digital calls directly with other vessels and shore stations, including the USA and Canadian Coast Guards.
IMPORTANT: Use caution when entering your MMSI number, because you can only enter it once. If you need to change your MMSI number after entering it, you must take the radio to your Garmin dealer for reprogramming. To enter your MMSI number: 1.
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Digital Selective Calling 2. The radio automatically sounds an alarm, switches to Channel 70, and transmits your call on HI (25 W) power. You can press any key to turn off the alarm sound. 3. After transmitting your distress call, the radio automatically tunes to Channel 16 on HI (25 W) power.
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Waiting for a Distress Call Acknowledgement If the radio does not receive a distress call acknowledgement, the radio retransmits the distress call at a random time between 3.5 and 4.5 minutes. This process is repeated continually until the radio receives an acknowledgement. Receiving a distress call acknowledgement: 1.
Digital Selective Calling Placing Calls Placing Individual Calls 1. Press the key. 2. Select INDIVIDUAL. 3. Select from the following options to select the place from which the MMSI number is retrieved: • MANUAL—a screen is displayed that allows you to enter the MMSI number manually. Select a number and move to the next character.
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Position data received from stations that respond to position request calls is sent over the NMEA network, so that you can track the vessels on your Garmin chartplotter, for example. For more information on NMEA 0183 and NMEA 2000, see 1.
Digital Selective Calling 4. Select ACCEPT when you have entered your MMSI number. 5. Select CALL. The radio transmits the call on Channel 70, and then switches to your current working channel. The screen displays “POS REQUEST WAITING FOR ACKNOWLEDGE”. Receiving Calls Receiving Distress Calls and Distress Relay Calls The radio sends data relative to the call over the NMEA network based on how you have...
Receiving Position Request Calls You can configure your radio reply automatically to incoming position requests, to prompt you to review and approve the incoming requests before replying, or to ignore incoming requests (see page 27 for more information). If you enable automatic position replies, the screen displays “SENDING POSITION CALLING”...
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Digital Selective Calling Position data received from stations that respond to position-request calls is sent over the NMEA network, so that you can track the vessels using your Garmin chartplotter. For more information on NMEA 0183 and NMEA 2000, see Selecting the Vessels and Activating the Call 1.
Working with the Call Logs For every DSC call that your radio receives, the calling station, type of call, and date and time of the call are recorded in the call logs. The latitude and longitude of the calling station are also recorded if they are transmitted with a call.
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Digital Selective Calling Placing a Call from a Call Log All calls placed from the call log are individual routine calls. 1. Press the key. 2. Select CALL LOG > DISTRESS 3. Select the MMSI number or the station name. 4.
Using the Directory Viewing the Directory 1. Press the key. 2. Select DIRECTORY. 3. Select a station name in your directory. 4. Press the CLEAR key to return to the previous screen. Press the the Home screen. Adding an Individual Entry to the Directory 1.
Digital Selective Calling Adding and Modifying Group Entries Adding a Group 1. Press the key. 2. Select GROUP > ENTRY. 3. Enter the MMSI number. 4. Enter a name. 5. Select ACCEPT to save your changes. Select without saving the changes. Press the Editing a Group 1.
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To enter position information: 1. Press the MENU key. 2. Select SYSTEM > MANUAL 3. For each number in the sequence, turn the Channel knob clockwise to increase the number, and counterclockwise to decrease the number. When entering a direction character, rotate the channel knob to switch between N or S and E or W.
Digital Selective Calling Sending Voicemail You can record a 15-second voicemail message and send it to another vessel. When you send the voicemail, the radio will call the other vessel and transfer the voicemail if the other vessel responds with an acknowledgement message. The have an outgoing voicemail message.
TIP: Try using position tracking on up to three contacts to automate this process. • When your VHF 300 series radio is connected to a NMEA 2000 network with another Garmin chartplotter, you can use the chartplotter interface to set up an individual routine call. •...
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Advanced Operation Selecting NMEA 0183 or NMEA 2000 This setting determines whether you are connected to a NMEA 0183 network or a NMEA 2000 network. The radio can only communicate over one network type at a time. To configure a VHF 300 or a VHF 300i: 1.
• OFF—the radio will not send data for this vessel. Distress call information will still be sent. Modifying the Operating Settings Modifying the Backlight and Contrast Settings 1. Press the MENU key. 2. Select SYSTEM > DISPLAY 3. Turn the Channel knob to adjust the backlight or contrast.
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Advanced Operation Configuring Course Over Ground/Speed Over Ground (COG/SOG) Information Displayed on the Home Screen You can display COG and SOG on the home screen if you have a GPS device connected to your radio. 1. Press the MENU key. 2.
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.
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Advanced Operation Changing the Language 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.
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.
Appendix • Select to enter a new position. See entering position data. Position Tracking After five consecutive failed attempts to request position information from a vessel, “NO POS FOR [VESSEL NAME]” is displayed on the screen. • Select RETRY to reattempt the position request. •...
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Channel Transmission Number 156.550 156.600 156.650 156.700 156.800 156.850 156.900 156.950 157.000 157.000 157.050 157.100 157.150 157.200 157.250 157.300 157.350 157.400 156.075 156.175 156.225 156.275 156.325 156.375 156.425 156.475 VHF 300 Series Owner’s Manual Receiving User 156.550 Commercial. VTS in selected areas. 156.600 Port operations.
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Appendix Channel Transmission Number 156.525 156.575 156.625 156.675 156.725 156.875 156.925 156.975 157.025 157.075 157.125 157.175 157.225 157.275 157.325 157.375 157.425 157.425 The letter “A” indicates simplex use of the ship station transmit side of an international duplex channel, and that operations are different than international operations on that channel.
Channel Frequency (MHz) 162.45 162.5 162.525 Canadian Channels Channel Transmission Number 156.050 156.100 156.150 156.200 156.200 156.250 156.300 156.350 156.400 156.450 156.500 156.550 156.600 VHF 300 Series Owner’s Manual Receiving Area of User Operation 160.650 Public correspondence 160.700 Public correspondence 160.750 Public correspondence 156.200...
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Appendix Channel Transmission Number 156.650 156.700 156.750 156.800 156.850 156.900 156.950 156.950 157.000 157.050 157.100 157.150 157.200 Receiving Area of User Operation 156.650 All areas Intership, Commercial, Non-commercial, and Ship Movement: Exclusively for bridge-to-bridge navigational traffic. Limited to 1 watt maximum power. 156.700 AC, GL Intership, Ship/Shore, Commercial,...
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Channel Transmission Number 157.250 157.300 157.350 157.400 156.025 156.075 156.075 156.125 156.125 156.225 156.225 156.275 156.325 156.375 VHF 300 Series Owner’s Manual Receiving Area of User Operation 161.850 Ship/Shore and Public Correspondence: Also assigned for operations in the Lake Winnipeg area. 161.850 Safety: Continuous Marine Broadcast (CMB) service.
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Appendix Channel Transmission Number 156.375 156.425 156.475 156.475 156.575 156.575 156.625 156.675 156.675 156.725 156.875 156.925 156.975 157.025 157.075 Receiving Area of User Operation 156.375 All areas Intership, Ship/Shore, Commercial, Non-commercial, and Safety: May also except EC be used for communications with aircraft engaged in coordinated search and rescue and antipollution operations.
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Channel Transmission Number 157.075 157.125 157.125 157.175 157.175 157.225 157.275 157.325 157.375 157.425 PC: Pacific Coast EC (East Coast): includes NL, AC, GL and Eastern Arctic areas WC (West Coast): Pacific Coast, Western Arctic and Athabasca-Mackenzie Watershed areas International Channels Channel Transmission Number...
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Appendix Channel Transmission Number 156.350 156.400 156.450 156.500 156.550 156.600 156.650 156.700 156.750 156.800 156.850 156.900 156.950 157.000 157.050 157.100 157.150 157.200 157.250 157.300 157.350 157.400 156.025 156.075 Receiving User 160.950 Public Correspondence, Port Operations, and Ship Movement 156.400 Intership 156.450 Intership, Port Operations, and Ship Movement 156.500...
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Channel Transmission Number 156.125 156.175 156.225 156.275 156.325 156.375 156.425 156.475 156.575 156.625 156.675 156.725 156.775 156.825 156.875 156.925 156.975 157.025 157.075 157.125 157.175 157.225 157.275 VHF 300 Series Owner’s Manual Receiving User 160.725 Public Correspondence, Port Operations, and Ship Movement 160.775 Public Correspondence, Port Operations, and Ship...
Appendix Channel Transmission Number 157.325 157.375 157.425 Specifications VHF 300/300i Specifications Dimensions: W × H × D: 9 Weight: 4.177 lb. (1.895 kg) Temperature Range: from 14ºF to 122ºF (from -10ºC to 50ºC) Compass-safe Distance: 20 in. (500 mm) Waterproof: IEC 60529 IPX7 (Immersion in 1 meter of water for 30 minutes) Antenna Connector: S0-239 (50 Ω) Digital Selective Calling: Class D Frequency Bands: All USA, Canadian, and International marine channels;...
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Adjacent Channel Power: -70 dBc or less Conducted Spurious Emission: -36 dBm or less Receiver Audio Distortion: Less than 10% Hum and Noise: Less than -40 dB Squelch Operation: Less than 107 dBm at tight setting Adjacent Channel Rejection: 70 dB or more Spurious Response: 70 dB or more Inter-modulation Response: 70 dB or more Audio...
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Appendix Transmitter Frequency Error: +/- 500 Hz Transmit Power (at 13.6 Vdc): High Power: 25 W (23–25 W) Low Power: 1 W (.7–1 W) Maximum Deviation: 5 kHz Hum and Noise: -40 dB or less Duty Cycle: 5% Transmit; 5% Receive; 90% Standby Modulation Distortion: 10% or less Adjacent Channel Power: -70 dBc or less Conducted Spurious Emission: -36 dBm or less...
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NMEA (VHF 300 models and VHF 300 AIS models) NMEA 0183 IN Sentences Supported (NMEA 0183 version 3.01) Sentence NMEA 0183 OUT Sentences Supported (NMEA 0183 version 3.01) Sentence VDM* NMEA 2000 PGN Information Receive 059392 ISO Acknowledgement 059904 ISO Request 060928 ISO Address Claim 126208...
Waterproof: IEC 60529 IPX7 (Immersion in 1 meter of water for 30 minutes) Contact Garmin Contact Garmin Product Support if you have any questions while using your VHF 300 series radio. In the USA, go to www.garmin.com/support, or contact Garmin USA by phone at (913) 397.8200 or (800) 800.1020.
Index Symbols 16/9 mode 1 W power transmission 25 W power transmission Automatic Identification System alarms battery GPS data invalid GPS data WX (weather alert) ATIS disabled functions with disabling enabling entering identification number viewing identification number Automatic Identification System disabling enabling autopilot capabilities...
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Index Garmin contact information Garmin GHS series handsets display overview groups adding deleting editing receiving calls from hailer, using heading display, modifying HI power transmission intercom initiating call receiving call language, changing latitude and longitude displaying local/distant reception sensitivity adjustment...
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specifications GHS 10 series VHF 300/300i AIS VHF 300 series Speed Over Ground displaying speed unit of measurement modifying squelch adjusting with handset adjusting with radio system messages main in use position tracking testing the radio time changing format configuring offset displaying transmitting with handset...