NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Compass Rose
From: Michael Wescott
Date: 2001 Mar 19, 4:03 PM
From: Michael Wescott
Date: 2001 Mar 19, 4:03 PM
>> The compass rose on a chart shows the True heading on the >> outer ring and the Magnetic heading on the inner ring. >> What is the function of the innermost (third) ring? It >> does not correspond to markings on either the True or >> Magnetic rings and I am baffled as to what its' purpose is. >> Can anyone on the list provide an answer? Thanks. > Just looking at it, it divides the circle into 32, and each > of those parts in 4. Points? perhaps, as in "Three points > off the starboard bow"? I never noticed that it was there > until you pointed it out. Rodney Myrvaagnes gets full marks. >From the American Practical Navigator (Glossary) compass points. The 32 divisions of a compass, at intervals of 11.25 degrees. Each division is further divided into quarter points. [...] compase rose. A circle graduated in degrees, clockwise from 0 at the reference direction to 360, and sometimes also in compass points. [...]