12" Brushed Aluminum Arms Parallel Rule #140

This sturdy 12-inch (30.48cm) parallel rule with brushed aluminum arms is inscribed with a protractor scale. It is used to plot direction on a nautical chart from any convenient meridian or compass rose. The two straight-edged rules are connected to maintain the same angle. By walking the rules across the chart and securely holding down the non-moving rule, you can effectively plot a course. 

• 12-inches (30.48cm) long
• Includes protractor scale
• Brushed aluminum arms
• Polished aluminum handle
• Milled acrylic with beveled edges
• Protective plastic sleeve
• Lifetime warranty