Hi,
yes, I´ll try to explain this a little better...
I spend two days with
driving on the boat the others with
working at the boat
.
Day 1 I drive over a number of lakes connected with canals. The canals are usually not wider than 30m. It was the very first time running pypilot on the boat in real life so I decided to look if I can calibrate pypilot and how it then works as a heading sensor and how big are the differences between the magnetic compass and the heading shown by pypilot.
So after start I drive a slow big circle at a wider place.
Then pypilot says 2d fix and I follow the canals and lakes. After passing a tunnel and an underwater cable pypilot shows a heading which was round about 100° off the course. This heading error stays until I drive a new circle. I then locked the calibration and all seems fine.
There was a lot of iron (retaining walls) around the tunnel.
Next day after switching pypilot on (during the night it was off) -calibration was still locked- there was a heading error again. I passed a lock, enter the Ijsselmeer and there I drive a circle, relock the calibration (2d fix) and sail a route over the sea. No more heading error again. Due to the fact that there was a lot of space I use pypilot in auto mode and after using the compass mode I decided to test the gps (route) mode.
Compass mode was fine, and route modus too except the steering correctments.
I use OpenCPN on a raspberry and during gps mode the build in route management of OpenCPN.
The next times using pypilot I have to investigate if the heading errors shown by pypilot are due to magnetic irritation of the compartement of the boat itself or due to things outside of the boat. The place I mounted the sensor is far away enough from electric or magnetic components I thought.
I have to test the route plugin
I have to understand the gains deeper.
Best regards
Andreas