Is a coastal scale chart and a set of dividers. I get so frustrated trying to do 'voyage planning' with any software on either my computer or on a chartplotter. If I'm going 5 miles, then yes, it's easy. Going 75 miles tomorrow? By the time you've made the doglegs, course changes, zoomed in, zoomed out, panned to the next chart, the answer could have been done with a set of dividers on the real chart. Of course, there's reasons we might like the info all neatly bundled into an electronic record but it just drives me nuts. Am I the only one?