If you are using "auto position fix" with real navigation, then a marker will apear about every 2 hrs.
If a leg will be reached before a marker is plotted, you need to know when to turn. So use timed runs when the legs are short.
If you look at the pic above, you will see an island in your path. You need to know when close to land, when to turn before a position is plotted.
Note - when you are very close to land - you can use the "auto position at battle atations" script. That will plot using dead reckoning every 5 mins untill stopped.
