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. Utilizing the latest 3rd generation digital technology, the dual-channel parallel receiver provides excellent range and performance.

All types of AIS messages are decoded and simultaneously passed to the USB port and 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.
MarineTraffic/FleetMon pre-programmed and configured this plug-and-play device for the partners. The contributor needs to connect the AIS receiver to a VHF antenna, the Internet, and a constant power supply.

Technical Information

Receiver	2 Channel AIS receiver for 161.975 MHz and 162.975 MHz Class A/B, Adjacent Channel Selectivity 70dB, blocking >90dB
Sensitivity	> -112 dBm for 20% MER
Power	9V - 30V DC, 190mA @ 12V 5,5*1,9mm Power connector or by USB cable with a USB-A to USB-B connector
Operating Temperature	-15°C to +55°C
Connector	BNC 50Ω for antenna RJ45 Ethernet Connector 10/100 BASE-T USB 2.0 Type B Socket Connector
LED	Red Power LED Green Reception LED Orange Link LED (Network Port) Green Activity LED (Network Port)
Output	NMEA0183, 38.400 Baud, VDM
Protocol	TCP, UDP, ARP, ICMP, TFTP, Telnet, DHCP, BOOTP, HTTP, AUTOIP
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) blink from time to time when the device receives AIS data. If one of the red LEDs does not blink irregularly, check the antenna, the coax cable, and the cable connections. It indicates that the device does not receive AIS data.

If the orange Link LED on the network port flashes three times at a fixed interval or nothing is connected to the other end of the network cable, check the network cable and the connection.

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

The green Activity 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.

Data Sharing

Here, you find a quick guide for programming your AIS receiver via the web interface to share data. Please note that these instructions only apply to devices you have purchased yourself. Devices sent by MarineTraffic or FleetMon are password-protected and already programmed, so these steps do not apply to them. If you want to use the AIS data with your computer, you can use the USB connection.

To program your AIS receiver via the web interface and share data, please follow these steps:

Login: Login to the AIS receiver's web interface using your credentials.
Navigate to the Menu: Go to the "Serial Port" section in the left-hand menu.
Open the Port: Open "Port 1" to configure the settings.
Select Port Profile: At the top of the page, you can select the port profile.
The options that you need are TCP sockets or UDP sockets.
- With the TCP option, you can send data to one specific target.
- With the UDP option, you can send data to multiple targets simultaneously.
Enter Target Information: To proceed and share the data, you need the sharing information (IP and port) from MarineTraffic. Please make sure that you "Add an existing station" here before you move forward.

UDP Sockets: Add MarineTraffic as the name for the "description." The IP or DNS name will be added to the "Send To" field, and the port will be in the "UDP Port" field. Press Add when you finish.

TCP Sockets: Add in the field "Server (name or IP)" the DNS or IP address. As Service, choose "Raw TCP" and add the port to the "TCP Port" field.
Save Settings and Restart the Device: Click "Apply" to save the settings, and then restart the device to establish the connection and apply the changes.

After completing these steps, your AIS receiver will be configured to share data through the selected connection.

USB Connection

The device's USB port 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, Mac, or Linux PC. You'll need additional drivers for Windows use, although the device is usually recognized automatically on other operating systems.

Drivers can be found here or on the official Comar website. If you're unsure about the installation, please seek assistance from a specialist.

Links