20-Inch Bi-Rola Rule

Made with the professional in mind, the P.R. 500 Rolling Plotter has a considerably larger body than the smaller Bi-Rola Rule. Built to take rigorous use aboard commercial and blue water vessels, this rolling plotter provides one of the easiest methods invented to plot courses.

• Patented four-way rolling motion
• Roller body has protractor markings every 1/2 degree
• 1-1/4 inch magnifying lens for enhancing chart data
• Easy to follow instructions
• Packaged in protective, durable vinyl pouch

Weight: 1.625 lbs. (737 g)

Dimensions: 19-5/8" x 3-5/8" x 1-1/4" (499 x 92 x 32 mm)

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