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Made with the professional in mind, the P.R. 500 has a considerably larger body than the smaller bi-rola? rule. Built to take rigorous use aboard commercial and blue water vessels, the P.R. 500 provides one of the easiest methods invented for plotting courses. Dims: Length 19-5/8", Width 3-5/8", Thickness 1-1/4".
Patented four-way rolling motion
Roller body has protractor markings every 1/2 degree
1-1/4" magnifying lens for enhancing chart data
Easy to follow instructions
Packaged in a protective, durable vinyl pouch
Wt. 1 lb. 10 oz.
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