The above was made at GPS Visualizer. It makes some very nice plots, and has a lot of configuration options. The only downside is that because it’s all done through a web interface, there’s a lot of slow iterations to find the settings that work. In that sense, it would be nice to have a piece of software which would go grab the maps and allow more real time tweaking of all the input parameters.
Lest you not be bothered to note the key, the track is colorized by heading (read / pink heading North, green heading South). I had colorized it by speed, but we cruised right between 3 and 3.5mph for almost the entire time we were moving, so that didn’t show much. You can see in the middle that we passed on the upwind side of the lighthouse each time.