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Made with the professional in mind, the Bi-Rola Rule 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.Features:
- 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
- Length: 19-5/8"
- Width: 3-5/8"
- Thickness: 1-1/4"
- Weight: 1 lb. 10 oz