18″ Aluminum Arms Parallel Rule (Weems & Plath 138)

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)

Weight:0.5 lb (1.27 cm)

UPC Code:721002001382

HTS Code:9017.80.0000

NSN:6675-01-573-2795