Weems & Plath 18" Birola Rule

Item Number: WP220

Weems & Plath 220 18" 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
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