Comar SLR450Ni

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The SLR 450Ni is designed for monitoring AIS signals near the shore and represents the latest generation of MarineTraffic AIS receivers since the beginning of 2024.

This compact device features a dual-channel synthesised VHF receiver and is powered by the newest Raspberry Pi mini computer. Equipped with built-in Ethernet, WiFi, and USB interfaces, it can easily connect to any wired or wireless network and stream 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 equipped with Class A or Class B AIS transceivers, as well as AIDS to Navigation and SART. You can utilize the receiver's web UI for local plotting or use software on your computer for visualisation.

 

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 5V DC, 2,5A, USBC Power Connector
Operating Temperature  
Connector

BNC 50Ω for antenna

RJ45 Ethernet Connector

Wifi

USB 2.0 Connector

HDMI

LED

Green Power LED

2x Red Reception LED A/B

Output NMEA0183, 38.400 Baud, VDM
Protocol TCP, UDP, ARP, ICMP, TFTP, Telnet, DHCP, BOOTP, HTTP, AUTOIP
Dimensions 95x90x28 mm
Weight 180 g

 

Wiring Diagram

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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

You can find more details on setting up and using the device here in the SLR350Ni manual:

Comar SLR350Ni