Comar R250 Dual Channel AIS Receiver with USB, NMEA 0183 & Wi-Fi
A high-performance dual-channel AIS receiver with USB, NMEA 0183, and integrated Wi-Fi outputs.
The R250 replaces the Comar R220U, adding wireless streaming and expanded connectivity while
maintaining simple, flexible installation options.
Key Selling Features
- Direct replacement for the Comar R220U AIS receiver
- Dual-channel AIS receiver (161.975 MHz & 162.025 MHz)
- Decodes all AIS message types: Class A, Class B, AIS-SARTs, and Aids to Navigation
- USB plug-and-play connection for PC-based AIS viewing
- NMEA 0183 VDM output for chartplotters and navigation systems
- Built-in Wi-Fi for wireless AIS and NMEA data streaming
- Multiplexes external GPS NMEA input with AIS data
- Powered via USB or 12/24 V DC supply
- Low power consumption (3 W nominal)
- Compact, rugged ABS enclosure with carbon-reinforced side panels
- Supplied complete with cables, power supply, and software
Overview
The Comar R250 is a compact, high-performance AIS receiver designed for both leisure and
commercial applications. It receives and decodes all AIS traffic within VHF range,
delivering vessel position, identity, speed, course, and navigational status information
to chartplotters, PCs, and mobile devices.
When connected via USB, the R250 is powered directly by the host PC and streams AIS data
immediately, making it a simple plug-and-play solution. When powered from a 12/24 V DC
supply, it provides simultaneous USB, NMEA 0183, and Wi-Fi outputs for more integrated installations.
Wi-Fi AIS & NMEA Data Streaming
The integrated Wi-Fi interface allows AIS and NMEA data to be streamed wirelessly to
tablets, smartphones, and PCs. Configuration is handled through an integrated web interface,
with support for Access Point, Station, or combined AP + STA modes.
GPS Data Multiplexing
An external GPS NMEA 0183 input can be multiplexed with AIS data, allowing both AIS targets
and position data to be carried on a single output stream. This is particularly useful when
feeding chartplotters or PC navigation software.
Specifications
| AIS Channels |
161.975 MHz (A) / 162.025 MHz (B) |
| Sensitivity |
Up to -112 dBm |
| Data Output |
NMEA 0183 VDM @ 38,400 baud (USB, NMEA, Wi-Fi) |
| Data Input |
NMEA 0183 @ 4,800 baud (GPS) |
| Wi-Fi |
2.4 GHz, AP / STA / AP + STA, TCP/IP & UDP/IP |
| Power Supply |
9–30 V DC, 3 W nominal (or USB-powered) |
| Dimensions |
140 × 120 × 37 mm |
| Weight |
250 g |
| Environmental |
IP40, -15 °C to +55 °C |
| Antenna |
50 O, BNC connector |
Downloads
FAQ
Is the R250 a direct replacement for the R220U?
Yes. The R250 replaces the R220U and adds integrated Wi-Fi while maintaining USB and NMEA 0183 connectivity.
Does the R250 transmit AIS?
No. The R250 is a receive-only AIS receiver and does not transmit vessel position.
Can AIS data be viewed on tablets or phones?
Yes. AIS and NMEA data can be streamed wirelessly via the built-in Wi-Fi interface.
What AIS targets are received?
The R250 receives Class A, Class B, AIS-SARTs, and Aids to Navigation transmissions.
NMEA 0183 Wiring Diagram
Typical NMEA 0183 and power wiring for the Comar R250 AIS receiver.
What’s in the Box
- Comar R250 Dual Channel AIS Receiver
- 12 V DC power supply
- M8 4-pin data cable (2 m)
- USB cable (1 m)
- BNC to UHF antenna adaptor
- Software & drivers
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