Weems & Plath Aluminium Arms Parallel Ruler 18in

The 18-inch (45.72cm) Aluminum Arms Parallel Rules feature aluminum arms that join two clear acrylic rulers enscribed 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 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

• 18-inches (45.72cm) long
• Protractor scale
• Sturdy clear acrylic with aluminum arms
• Protective plastic sleeve
• Lifetime warranty

• Length: 18 in (45.72 cm)
• Width: 2.6 in (6.6 cm)
• Height: 0.5 in (1.27 cm)
• Dimensions: 1/4' (5 mm) thickness; 18' (457 mm) length
• Weight: 0.5 lb (1.27 cm)
• UPC Code: 721002001382
• HTS Code: 9017.80.0000
• NSN: 6675-01-573-2795