Course Plotter

Course Plotter This is a 15' course plotter with a semi-circular protractor scaled from 180 to 360 inside. A small auxiliary protractor scales is printed inside the larger one for north and south courses. Lower edge scales 1:80, 000 and 1:40, 000 to accommodate National Ocean Survey charts. Upper edge is scaled 1' equals 20 miles to accommodate the VP-OS Universal Plotting Sheets.