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Aluminum Arm Parallel Rule

No navigator should be without a good set of parallel rules as part of the navigation back up plan in the event of an electronic navigation failure. These parallel rules are accurate and durable. Choose from four arm lengths.

4 in stock


Product Type: Parallel Rule

Vendor: Weems & Plath

Product #: WeemsPlath-140


Black parallel lines on each rule improve ease of use and accuracy. Brushed aluminum arms. Polished aluminum handle. Milled acrylic with beveled edges. No protractor scale. Lifetime warranty.


  • Marine aluminum arms/handles
  • Milled acrylic with beveled edges
  • No scale

Choose from:

  • 12"
  • 15"
  • 18"
  • 24"