Douglas 5" Square Navigational Protractor Sale With the optional computer interface

With the optional computer interface

Two large pockets

The 4" cutting edge makes deeper faster cuts and easier chopping

Inside knee pad pockets with hook-and-loop closures

Waterproof to 200 feet/ 60 meters

Douglas 5" Square Navigational Protractor Sale With the optional computer interfaceNavigational Protractor also known as a Navigation Square Protractor or Douglas Navigational Protractor for Air and Sea 5" x 5" for measuring on charts, determining bearings, or to use as a parallel rule. Navigation protractor 360 marked in 1 intervals. Sometimes referred to as a Douglas protractor, the 5" Square Aviation Protractor is best suited for rapid plotting of courses and bearings in a confined space. Notations can be easily made directly on