Here's a special flight planning tool we really like. A colorful little plotter with a rotating azimuth that makes it much easier to plot a course line. Place the compass rose over your departure point and rotate the straight edge towards destination. Presto!An instant readout of your course! Reads distance in statute miles or nautical miles for both sectional & WAC charts. Made of bullet proof Lexan. Wont crack, break, or warp in extreme heat or cold.