Of all Weems & Plath's traditional parallel rulers, the 15 inch Brushed Aluminum Arm Parallel Ruler is the best seller. This sturdy acrylic parallel ruler is easy to use and is a necessary tool for every seagoing navigator.

An essential item in any proper navigation kit, the aluminum arm parallel ruler is used to plot direction on your nautical chart. The aluminum arm parallel ruler is, essentially, comprised of two straight-edges hinged so that they maintain the same angle. By alternating the moving edge, and securely holding down the non-moving edge, you can move the aluminum parallel ruler about the chart while still maintaining the same angle.

• Brushed aluminum arms
• Polished aluminum handles
• Milled with bevelled edges
• Includes protractor scale

Weems & Plath item no. 141

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