Douglas Navigational Protractor 5" - D565 rechargeable which allows you to toggle

which allows you to toggle between the navigation display and backup display modes at the press of a button

producing 50% more energy than the Instinct 2 Solar

the collapsible 1

Overall Length: 5

Douglas Navigational Protractor 5" - D565 rechargeable which allows you to toggleCalled "navigational" primarily because it goes continuously from 0 to 360 as a compass rose does. Use for plotting lines of position in celestial navigation or for general plotting and vector problems on plain paper that does not have a compass rose. In England and Australia it is more commonly called a Douglas Protractor, where they are popular for general plotting.