USB Logger Installation

This device has been designed for easy installation by both professional marine electronics installers and by non-technical boat owners. Here we will take you through the physical installation and connection of the device.

Attaching the Seatalk Option

If you are using the optional Seatalk adaptor, it is easiest to fit this before physically installing the device. Simply loosen off all the wire connector screws on the logger, and insert the Seatalk adaptor, label side up. Then tighten up all the screws, locking the adaptor in place.


First, you need to decide where to locate the device. You need to put it in a dry location to which you can run the power and data cables, and also have enough room to insert and remove the USB stick. You can secure it in place either with 4 countersunk M4 (US #8) screws, or with Sta-Lok or Velcro.


The device consumes minimal power, so in general you can take power from the same supply as that used by your boat's instruments. If you have the Seatalk adaptor, and want to power it from the Seatalk bus, see the Seatalk section below. It also has an internal self-resetting fuse, so no inline fuse is needed. The voltage can be 9 - 30V, so can be run on any 12V or 24V supply. The connectors take wires of 0.32 - 3.3mm2 (22 - 12AWG), stripped back by 6mm (1/4"). Stranded, not solid, wire should always be used on a boat as solid wires become brittle with time and may snap; in the USA tinned wires are generally used to avoid corrosion of the copper, though this is seldom done in Europe. The cables should be secured close to the device, so that any strain on the cable does not risk pulling a wire out of the connector. Once connected, switch the power on and the power LED should flash green a couple of times and then show solid green. If it is stays quick flashing, then the voltage is below 9V. If it doesn't light up, then either the + and - are reversed, or there is no power. Switch off power whilst the data connections are made.


The device has two identical NMEA inputs that operate at 4800bps. With the Seatalk adaptor, one of these inputs becomes a Seatalk input.

Wiring for NMEA0183 data should be shielded twisted pair, with one cable used to send data and another to receive. This is important for long cable runs, or for installations where there are a lot of sources of interference and electrical noise, but for short runs on a typical leisure boat it isn't strictly necessary. Our NMEA interfaces are opto-isolated, which helps eliminate any interference that the wiring may have picked up.

Standard NMEA wiring uses 2 wires for data , strictly labelled A and B, but some manufacturers label them Signal and Ground or + and -. Connect A/Signal/+ to the A terminal and B/Ground/- to the B terminal. Some manufacturers like Garmin don't follow the NMEA standard, using a single data wire and sharing the data ground with the - ve power lead. In this case, the data wire goes to A, and B shoulkd be connected to the power -ve wire from the Garmin. If the logger is on the same circuit as the Garmin, then you can just connect the Power - and the B connections on the logger. For details of connections to your instruments, you will need to refer to your instruments' manuals, or you can refer to the data we have built up on the TeamSurv web site.

Once connected, power on and you will see the green power LED come on, and then the Ch1 and Ch2 NMEA LEDs will each flash green as a valid sentence is receiver (they may appear to be on continuously if there is a lot of data), or flash red if an invalid sentence is received. If they do not flash, or flash red, then try swapping round the A and B wires, and also check that the instrument is outputting data at 4800bps (e.g. many AIS devices will output data at 38400bps as standard). If they do not flash at all, check the instruments are switched on; the wiring from the instrument to the logger; and check that the instrument is configured to output data to that port.

Seatalk Option

With the Seatalk adaptor, you have one NMEA0183 connection operating at 4800bps, and one Seatalk connection. The NMEA connection is connected as described above. Seatalk cabling consists of 3 wires: red and black for + and - 12V power, and yellow for data. The logger can either go at the end of the Seatalk cabling, or you can cut a cable and put it in the middle. Unless your Seatalk network is particularly large, you can power the logger off the Seatalk bus, connecting red to + and black to -. The yellow data wire goes to the Seatalk In connection. If you are putting the logger in the middle of a Seatalk cable, both red wires go to +, both black to -, one yellow to Seatalk In and the other to Seatalk Out.

You have now successfully installed the device, and are ready to go ahead and use it.