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1400 E. Clement Street
Baltimore,
Maryland,
United States
410-685-5068
This Course Plotter has a semi-circular protractor scaled from 180° to 360° inside. The lower edge of the course plotter scales 1:80,000 and 1:40,000 to accommodate National Ocean Survey charts. For north and south courses, a small auxiliary protractor scale is printed inside larger one on the course plotter and is used against parallel latitude. The upper edge of the Course Plotter is scaled 1 inch equal to 20 miles to accommodate VP-OS Universal Plotting Sheets.