|
|
|
|
|||||
|
||||||
Subject: Re: COMPASS ROSE
From: Michael Wescott (wescott@XXX.XXX)
Date: Mon Mar 19 2001 - 18:03:24 EST
>> 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.
[...]
|