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Owner's Manual

Explorer Series GX1850 25W Fixed Mount VHF / NMEA2000 / Second Station Capable

• Meets ITU-R M.493-13 Class D DSC (Digital Selective Calling)

• Separate Receiver for CH70 (Receiving DSC Calls)

• Ultra-slim and compact Rear case design (Depth 3.3", 82mm)

• NMEA2000 Compatible (GX1850GPS/GX1850)

• NMEA 0183 Connectivity

• E2O (Easy to Operate) Icon & Menu System

• Preset key stores up to 10 favorite channels

• Second Station Remote Microphone (Optional RAM4 SSM-70H)

• Intercom Feature between the Radio and an Optional Second Station

• Programmable Scan, Priority Scan, and Multi Watch

• Automatic DSC polling of up to 6 ships GPS positions

• GPS Compass, Waypoint and GPS status pages (when connected to a GPS)

• Enter, Save, and Navigate to a waypoint using the Compass page (when connected to a GPS)

• Navigation (LAT/LON, SOG, and COG) information shown on display (when connected to a GPS)

• GM (Group Monitor) Using DSC Group position Calling

• MOB (Man over Board) Operation

• Selectable Night Mode Display

• Noise canceling microphone with channel change selection, 16/S and H/L keys

• NOAA Weather channels with weather Alert

NMEA2000 Compatible

Easy plug and play connectivity to the NMEA bus. A single plug-in interface allows the radio to instantly receive position data from a compatible GPS, and easily send DSC information (position sharing data, DSC distress information) right to the display of the chartplotter.

Second Station RAM4 compatibility

Now compatible with Standard Horizon's latest second station microphone RAM4, model SSM-70H. All functions on the main radio can now be controlled on the Second Station RAM4, this includes all radio functions, DSC functions, and intercom features between the radio and the Second Station.

E2O Easy to Operate Menu System

Keeping the everyday boater in mind, the Easy to Operate menu system is now more intuitive than ever. Access all the menu functions and settings with just a few simple steps. DSC calling and DSC programming has never been easier.

Ultra Compact Easy Installation

The Explorer Series is more versatile than ever, with it's ultra thin, compact rear case, measuring 3.3” in depth or half the depth of comparable VHF radios on the market. The rear case design also gives flexibility when flush mounting the radio in tight areas or bracket mounting the radio by taking up less dash space, and allowing more mounting options.

How do I remove the current MMSI number from my newer radio?

For radios produced in 2018 and newer we can do this remotely! We would need you to email marinetech@yaesu.com with the following information: Name, Model Number, Serial Number, Current MMSI, and the Request Code. The radios Request Code you will find the radios Reset Menu under the option MMSI. All are needed to provide you a reset password via email. Typically, we can provide you a reset password in about 2 business days.

How can I check to see if my radio is receiving correctly? I don’t seem to hear anyone talking.

Try switching the radio over to the Weather channel mode. When you are in this mode the USA will disappear and be replaced by WX on your screen. Make sure you check all 10 weather channels to find your local one. If you receive weather loud and clear, this is a good sign your radios receiver is working as the radio only has one receiver. You may be out of range of other boaters, or you may be listening on channels no one is actively using at the time.

Why does my radio not talk to the NMEA 2000 network?

Go to the radios NMEA 2000 Setup menu. We normally suggest changing the Device Number on the radio to something that does not match up to other equipment on the network. If you have a GPS antenna with a device number of 002, then make sure the radio is not set to 002. Try a radio device number such as 009. We find having different numbers reduces confusion on the network. After changing the device number, you will go to the option called Select Device (NMEA 2000 Setup menu) and run a search for devices. Start by selecting your GPS chart plotter and tap the button under Set once. Go to the main screen and see if it’s working. A 2K icon will appear in addition to your position. If not, go back to the Select Device menu and select the next device on the list. Sometimes it’s the secondary devices that act as more consistent sources of NMEA 2000 data.

Why can others not hear me when I transmit?

There are several reasons this can happen which are not a fault of the radio. Make sure you test with another person who is aware you will test your radio with theirs. Check that both radios are on a common non-emergency channel such as channel 68. Speak clearly directly into the microphone hole opening with your mouth no more than 2 inches away. Try setting your radio to Hi transmit power.

I am transmitting in an area with lots of boats and no one responds to me. Why is this happening?

Although there are other boaters near you, 1) they must have their radio turned on, 2) they must be on the same channel, 3) be able and willing to respond to your call.

When I press the talk button (PTT) my radio’s display will shut off and restart. Why does this happen?

The radio will shut down to protect itself. This will happen when the radio is unable to get sufficient “energy” from the power source. - On a vehicle installation you want to check the voltage at the radios rear DC connector. It should be about 13.8 VDC. If this voltage at the radio drops below 11 VDC, the radio will shut down. - Consider reducing the DC cables from the radio as direct to the battery as possible. - Try to use a higher gauge (thicker) cable if the DC must travel long distances.

The radio is asking me to enter my MMSI number. Where do I get this number?

The MMSI numbers are a number you will need to register for through one of the registration agencies. For a U.S. registered MMSI number you can reach out to Boat US or United States Power Squadrons. For an MMSI number for international use you will have to register through the FCC. Boat US https://www.boatus.com/mmsi/ US Power Squadrons https://www.usps.org/ FCC https://www.fcc.gov/wireless/bureau-divisions/mobility-division/ship-radio-stations

Why do I get my radio to send DSC/DSE data to the NMEA 2000 network? This data is related to position reports and distress alerts.

Go to the radios GPS setup menu. Go into the NMEA 0183 IN/OUT submenu. Turn On the DSC/DSE output sentences.

Model

Mounting Hardware

MMB-97	MMB-97
Rain/Dust Covers

HC1600 DUST COVER	HC1600 DUST COVER
Second Station

CT-100	23' Extension Cable for CMP25 / CMP30 / CMP31 / SSM-70H / SCU-30
SSM-70H	RAM4 Wired Remote Access Microphone
Sensors

SCU-31	SCU-31 GPS Smart Antenna
Speakers

MLS-410SP-B	Fixed Mount VHF Speaker Black
MLS-410SP-W	Fixed Mount VHF Speaker White

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Marine \ Owners Manuals \ VHF Fixed Mount GX1800/GX1850 French Owners Manual ( 28.11 MB )

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