ChartKit Plotter Arm, Weems & Plath

This adjustable parallel arm is fitted with a moveable compass rose. This permits the direct plotting of magnetic compass courses and firmly supports chart work whether in the cockpit, on deck, or below. Plot a course to a given point by locking the rule at a given bearing. By moving the rule so that the point is on an edge, you quickly determine the correct line of position on a chart for that bearing. Can be easily mounted to any area used for chart work. For use with ChartKit Plotter, Item 122.