Douglas Navigational Protractor 5" - D565 tiki solar torch which offers our best-in-class sonar

which offers our best-in-class sonar and mapping and premium touchscreen display with keyed-assist

and can be removed for compact transportation and storage

Completely rechargeable

The heft of the 0

Douglas Navigational Protractor 5" - D565 tiki solar torch which offers our best-in-class sonarCalled "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.