Example NMEA-0183 Sentences
Here's a log of the Raspberry Pi Multiplexer's output I wrote about previously.
This is a great resource to get each sentence's definition, although you will find the MDA sentence here.
The "PFEC" sentence is a proprietary sentence used so that my Furuno RD30 display can read roll and pitch. I use the free NKE Marine Electronics app on my phone to display everything, so I include a few XDR sentences so that it recognizes them (same with GPVTG).
Out of curiousity, I'm going to compare the costs here between a DIY setup and a professional one (minus all the blood and sweat of course).
* the Airmar 220WX has a compass, accelerometer, GPS, and weather station all in one unit. However, I personally don't think having a GPS at the top of a rocking mast will produce very good GPS data
** the Regatta Processor calculates the VDR sentence, or Tidal Set and Drift (speed and direction of the ocean current)
By doing the work yourself, it'll cost you about 4% of what a professional installation would cost (granted, if you're doing professional work, you should definitely get a professional setup).
Well that's pretty cool. Next up is to make an NMEA wind instrument like this or this ultrasonic wind sensor.