12" Brushed Aluminum Arms Parallel Rule (Weems & Plath 140)

This sturdy 12-inch (30.48cm) parallel ruler with brushed aluminum arms is enscribed 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 rulers are connected to maintain the same angle. By walking the rules across the chart and securely holding down the non-moving ruler, 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 Length: 12 in (30.48 cm) Width: 2.5 in (6.35 cm) Height: 0.5 in (1.27 cm) Weight: 0.4 lb (1.27 cm) UPC Code: 721002001405 HTS Code: 9017.80.0000