Parallel Plotter

Parallel Plotter This parallel rolling plotter contains distance scales at 1:20, 000, 1:40, 000 and 1:80, 000 for charts and also an inch scale. Semi-circular protractor is included for measuring courses and bearings against a meridian on a chart. Two quarter circle protractors are for measuring courses and bearings against a parallel of latitude. Courses and lines are transferred by two rollers on a slide axis. Used for measuring or laying off courses and distances on a chart.