The Weems Parallel Plotter is our most popular rolling plotter. It is mounted on an aluminum roller assembly that allows you to plot courses and parallel lines with simple, direct transfer and doesn’t require the space traditional parallel rules or triangles take up. The roller keeps the plotter parallel as you slide it across the chart. It includes distance scales at 1:20,000, 1:40,000, and 1:80,000 to fit U.S. Coast and Harbor Charts, as well as an inch scale. A semi-circular protractor for measuring course and bearing against the meridian on a chart, and two quarter-circle protractors for measuring course and bearing against the parallel of latitude, are built into the plotter. It is also used to measure or lay off courses and distances on a nautical chart.

• 12-1/2 inches (31.75cm) long
• Durable acrylic plotter mounted on a marine aluminum roller assembly
• Includes distance scales at 1:20,000, 1:40,000, and 1:80,000 to fit U.S. Coast and Harbor Charts
• Inch scale
• Semi-circular protractor
• Two quarter circle protractors
• Instructions on the back of the plastic storage sleeve
• Limited Lifetime Warranty