I know the ruler is more accurate at the 500 m scale, but then any ship plotted at a decent distance will be OUT of the map you see at that zoom
Remember that plotting is something not done at close ranges -you don't have time for that- but works best instead at more than 5000 metres. Also, forget Wazoo's tutorial's pin-point accurancy at distances, allowing you to get course and speed with just two measurements. That is not the general rule, nor was it what real kaleuns managed to do. Instead, as explained on my tutorial, it's the AVERAGE of the movement what shows the best results.
Good hunting
