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Weems 18" Aluminium Arms Parallel Rule

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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.

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

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)

$48.92
Hurry! To ship this item on 05/18/22, order in the next
Catalog# WP138

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.

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

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)