Pypilot with ST4000 autohelm

[ironman]

Ok, as promised, I checked my claim wrt tying the pi's output directly to a nmea input. Also a little demo of the "route position bearing".

Note that I had to run opencpn as root to get access to the uart at /dev/ttyAMA0. Interested to hear how to run it as an unprivileged user.

https://youtu.be/5TtgoWs6RhU