Comar R400N (SLR350N)


The R400N (former name SLR350N) is the perfect solution for monitoring AIS-equipped vessels from remote locations and streaming the collected AIS data to a central control/monitoring station or a database. Utilising the latest 3rd generation digital technology, the dual-channel parallel receiver provides excellent range and performance.

All types of AIS messages are decoded and are simultaneously passed to both the USB port and to the Ethernet Network for local display or for sending to a remote server enabling the monitoring of complete coastlines.

It is one of the AIS receiver models that MarineTraffic and former FleetMon provided to its contributors in the past. MarineTraffic has shipped these devices until 2017 and FleetMon until 2023.
A plug-and-play device pre-programmed and configured by MarineTraffic/FleetMon for the partners. The contributor needs to connect the AIS receiver to a VHF antenna, the Internet, and a constant power supply.


Technical Information


2 Channel AIS receiver, for 161.975 MHz and 162.975 MHz

Class A/B, Adjacent Channel Selectivity 70dB, blocking >90dB


> -112 dBm for 20% MER


9V - 30V DC, 190mA @ 12V

5,5*1,9mm Power connector

Operating Temperature -15°C to +55°C

BNC 50Ω for antenna

RJ45 Ethernet Connector 10/100 BASE-T

USB 2.0 Type B Socket Connector


Red Power LED

Green Reception LED

Output NMEA0183, 38.400 Baud, VDM
Dimensions 130x105x46 mm
Weight 500 g



Wiring Diagram



LED Status

The green LED (POWER) shows that the device is on. If no green light appears, recheck the power connection.

The two red LEDs (A/B) blinks from time to time when it receives AIS data. If one of the red LEDs does not blink irregularly, check the antenna, the coax cable and the cable connections. Its indicate that the device receive no AIS data.

The orange LED on the network port flashes 3 times at a fixed interval if no network cable is connected or nothing is connected to the other end of the network cable. In this case, check the network cable and the connection.

The orange LED on the network port is permanently on when a connection has been established to a network device (e.g., switch).

The green LED on the network port only flashes when a connection has been established (see orange LED). It does not mean that the data is being transmitted to MarineTraffic or FleetMon.


USB Connection

The USB port on the device can also be used to transfer AIS data to your computer. To do this, you'll need a USB cable with a USB-A to USB-B connector. This lets you connect the device to your Windows PC, Mac, or Linux PC. You'll need additional drivers for Windows use, although the device is usually recognized automatically on other operating systems.

You can find drivers here or on the official Comar website. If you're unsure about the installation, please seek assistance from a specialist who can help you.



Download the SLR-350N User's manual

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