What I'm really looking for is some kind of sixth sense to just zen a location. I've tried the overlay and 4B pencil trick and it works some times but here in the sound it is often damp if not wet on board and often it made a mess. Maybe I just haven't found the right pencil yet.
Not sure the worksheet idea is a keeper either but it has two advantages.
No mess on the chart and a record of what you did if you want to check yourself.
As far as complication goes it is just a standard running fix, just at the end the distance from the mark is taken off a scale. Any running fix is a lot more complicated to describe than to do.