Standard Horizon GX1850 Explorer Series – White – 25W Fixed Mount VHF with Class D DSC and NMEA 2000
A versatile fixed-mount VHF radio with Class D DSC and broad connectivity, including NMEA 2000 and NMEA 0183,
designed for integrated networked installations. Requires an external GPS source for DSC position reporting.
Key Selling Features
- 25W / 1W fixed-mount VHF radio with Class D DSC
- Dedicated receiver for CH70 (continuous DSC call reception)
- Supports NMEA 2000 for seamless integration with a marine electronics network
- NMEA 0183 input/output for optional chartplotter and device interfacing
- External GPS input required for DSC position reporting
- E2O (Easy to Operate) icon/menu system
- Ultra-slim rear case design (depth 3.3 in / 82 mm) for easier installations
- Preset key for up to 10 favorite channels
- Programmable Scan, Priority Scan, and Multi Watch
- Second-station capable with optional wired remote microphone (RAM4 / SSM-70H)
- Intercom between main radio and second station
- MOB (Man Overboard) support and group DSC monitoring
- Selectable night mode display
- Noise-canceling microphone with dedicated H/L and 16/S keys
- NOAA weather channels with Weather Alert
- Submersible IPX8 waterproof rating (1.5 m for 30 minutes)
- 3-year waterproof warranty
Overview
The Standard Horizon GX1850 is built for boaters who operate vessels with an integrated network (NMEA 2000)
and want flexible connectivity across onboard electronics. It supports Class D DSC and includes dedicated DSC
monitoring on Channel 70, but requires an external GPS feed for position-enabled DSC functions.
DSC Safety Calling (External GPS Required)
Digital Selective Calling (DSC) gives you one-touch distress calling and direct digital vessel-to-vessel calling.
To enable DSC position reporting and position-enabled features:
- A valid MMSI number must be programmed into the radio
- An external GPS must be connected (via NMEA 2000 or NMEA 0183) to provide position and time
- DSC test calling lets you confirm proper setup before departure
NMEA 2000 Integration (Preferred)
The GX1850 supports NMEA 2000 for networked installations, allowing position, heading, and time to be shared from
existing GPS/heading sources without additional cabling. NMEA 2000 also simplifies powering and connecting
multiple devices on a backbone.
NMEA 0183 Support (Optional)
In addition to NMEA 2000, the GX1850 includes NMEA 0183 input/output for legacy chartplotters, GPS devices,
and redundancy. This offers flexibility for mixed installations or redundancy paths.
Second Station + Intercom (Optional)
Second-station capability adds an optional wired remote microphone (RAM4 / SSM-70H) and supports an intercom
feature between the main unit and the second station.
Specifications
| Transmit Power |
25W / 1W |
| DSC Class |
Class D DSC |
| DSC Receiver |
Dedicated CH70 receiver |
| GPS Source |
External GPS required (NMEA 2000 or NMEA 0183) |
| Rear Case Depth |
3.3 in (82 mm) |
| NMEA |
NMEA 2000 & NMEA 0183 |
| Weather |
NOAA weather channels with Weather Alert |
| Waterproof Rating |
IPX8 (1.5 m for 30 minutes) |
| Second Station |
Optional RAM4 wired remote microphone (SSM-70H) |
Downloads
FAQ
Does the GX1850 include built-in GPS?
No. The GX1850 requires an external GPS source for position and time in order to support DSC position reporting.
Can I use DSC without GPS?
You can still make and receive DSC calls, but position-enabled features (distress with position, group monitor with position) require a GPS data feed from NMEA 2000 or NMEA 0183.
Do I need an MMSI number?
Yes. A valid MMSI must be programmed to use DSC distress calling and DSC vessel-to-vessel calling.
Can the GX1850 connect to my network?
Yes. The GX1850 supports both NMEA 2000 for modern networked installations and NMEA 0183 for legacy or redundancy connections.
What’s in the Box
- Standard Horizon GX1850 VHF Radio
- Microphone (noise-canceling)
- Mounting bracket and hardware
- Power cable
- Documentation
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