Comar SLR350Ni

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Specifically designed for coastal monitoring of AIS-equipped vessels, the SLR-350Ni is a new take on traditional AIS receivers that enhances the functionality of the successful Comar SLR-400N.

 

This compact dual-channel synthesized VHF receiver is based on the Raspberry Pi 3 mini computer. Built-in Ethernet, WiFi, and USB interfaces can be connected to any wired or wireless network and start streaming data to up to five user-defined destinations, excluding the reserved MarineTraffic data stream.

 

The unit is capable of receiving and decoding all AIS transmissions from vessels fitted with Class A or Class B AIS transceivers, Aids to Navigation, and SART. Using compatible software, AIS data transmitted from ships within range can be displayed on the screen, giving a visual representation of all traffic within VHF range. The receiver's web UI also enables local plotting. 

 

Technical Information

Receiver

2 Channel AIS receiver, for 161.975 MHz and 162.975 MHz

Class A/B, Channel Spacing 25kHz

Sensitivity

> -112 dBm for 20% MER

Power

5.1V DC, 2500mA min

microUSB Power connector

Operating Temperature -15°C to +55°C
Connector

BNC 50Ω for antenna

RJ45 Ethernet Connector 10/100 BASE-T

4x USB 2.0 Type B Socket Connector

Wifi

HDMI > not used

LED

Power LED

Channel A Reception LED

Channel B Reception LED

Output NMEA0183, 38.400 Baud, VDM
Protocol TCP, UDP, DHCP, HTTP, AUTOIP
Dimensions 135x80x37 mm
Weight 180 g

 

 

Wiring Diagram

SLR350NI_Wiring.jpg

 

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

 

Links

Download the SLR350Ni User's Manual (pdf)

Download the relevant MTUtility software, depending on your Operating System:

Windows (64 bit)

Windows (32 bit)

Linux

OS X

 

Keep in mind that anyone can contribute to the collection of AIS Data by setting up an AIS receiving station. If you want to expand AIS coverage around your area, feel free to apply for free AIS-receiving equipment.

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