After assigning speed, start time, date to my OpenCpn Route
planner the route
planner does not calculate the ETA's to a waypoint correctly. If you take the distance of a leg from the Route Properties and compute time for leg added you the previous waypoint's arrival time their seems to be about a 10 minute error.
I have also noticed the course on the chart popup is 1 degree difference with what listed in the route properties.
I have screenshots of the above, but don't know how to include them as a http file.
Your help would be appreciated.