I have a vanilla system setup which contains a Navnet Touch 3d plotter, a SC-20 compass, and a NAVpilot-711C connected via N2K. The plotter runs the latest software version.
After two hours of sailing the plotter displayed suddenly “Position Lost” and also the SOG displayed wrong values up to 95 knots instead of 6 knots (the actual speed). The “Position Lost” message could be cleared but the SOG did continue to display wrong values. The SC-20 has been installed as per the installation directive. On the plotter I also noticed that the course line was changed 180 degrees every now and then. Please advice.
After two hours of sailing the plotter displayed suddenly “Position Lost” and also the SOG displayed wrong values up to 95 knots instead of 6 knots (the actual speed). The “Position Lost” message could be cleared but the SOG did continue to display wrong values. The SC-20 has been installed as per the installation directive. On the plotter I also noticed that the course line was changed 180 degrees every now and then. Please advice.