Douglas Navigational Protractor 5" - D565 rechargeable If rough waters come and

If rough waters come and the handheld goes overboard

aera 6xx Series

which offers the best protection from damaging trees Wrap the strap around a sturdy tree or post and insert the knotted end through the loop end to create a cinch

This rugged

Overall Length: 5

Douglas Navigational Protractor 5" - D565 rechargeable If rough waters come andCalled "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.