Weems 18" Aluminum Arms Parallel Rule Read more..
The 18-inch (45.72cm) Aluminum Arms Parallel Rule feature aluminum arms that join two clear acrylic rulers inscribed with a protractor scale. An essential item in any proper navigation kit, these rules are 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.
Length:Â 18 in (45.72 cm)
Width:Â 2.6 in (6.6 cm)
Height:Â 0.5 in (1.27 cm)
Weight:Â 0.5 lb (1.27 cm)
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Weems 18" Aluminum Arms Parallel Rule
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