18-Inch Aluminum Arm Parallel Rule

The 18-Inch Aluminum Arm Parallel Rule is a precision plotting instrument designed for accurate course laying and bearing transfer on nautical charts.

• 18" length and 1/4" thickness for stable, accurate chart work
• Rugged aluminum arms and handles for long-lasting performance
• Parallel hinged straight-edges maintain constant angle when walking across the chart
• Ideal for plotting headings, transferring bearings and aligning with meridians
• Backed by a lifetime warranty for professional and recreational navigators

A core component of any navigation kit, ready to back up or complement electronic systems.