Current Setup

The Gear I'm Using

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• Raspberry Pi 3 Model B (2016 version--you can use an older one, but you'll need a wifi dongle)
• GlobalSat BU-353-S4 USB GPS Receiver (but any USB GPS will work)
• Airmar DST800 Thru-Hull Smart Sensor Triducer (Depth, Temperature, and Water Speed Paddlewheel--but any regular NMEA sailboat instrument will work)
• MPU-9250 9-DOF Accelerometer, Gyro, and Tilt-Compensated Compass (only $12.50! many other IMUs will work though)
• BME-280 Temperature, Pressure, and Humidity Sensor 
• Furuno RD-30 NMEA Display (I got mine for $39 on eBay!)

The Guides

• A Raspberry Pi Multiplexer
• How to Calibrate a Sailboat Paddle Wheel (Part 1 / Part 2)
• Here's the output stream of the KTS system

Some Notes

The code present on this website doesn't necessarily match the code I'm using on my system right now. For example, the paddlewheel calibration Part 2 isn't in the multiplexer guide posted above because I came up with it after posting the guide--however, it is reflected on the system I have on the boat. 

Also, the RD-30 display had a few dead pixels, which is why I got it for so cheap on eBay. Keep checking there by searching NMEA 0183 every now and then, and some really great deals keep popping up.

I also use OpenCPN on my laptop, and the free NKE Marine Electronics App on my iPhone at the same time. My friends can also connect to the wifi and use their own apps of their choosing. 

The Future

• Install a wind sensor anemometer
• Calculate the leeway of the boat
• Install an integral, but detachable, Raspberry Pi with OpenPlotter and a touch screen
• Create an anchor winch that automatically deploys 7 x the depth of the water at the flip of a switch
• Integrate all this with the autopilot
• Explore AI options when it comes to yacht racing (yeah, that may never happen, but it's worth a shot)