---- Rocket J Squirrel <camping.elliott@GMAIL.COM> wrote:
> On 08/24/2011 05:40 PM, David Beierl wrote:
> > At 11:45 AM 8/24/2011, Rocket J Squirrel wrote:
> >> My thumb is only accurate to one decimal place. Should I round up, or
> >> down?
> >
> > Down if the magnetic declination is greater than 42 degrees.
>
> Eastern or western?

Western is negative, so that would be less than 42 degrees.  Though often stated as degrees, minutes, and seconds (or nowadays, as fractions of a degree), east or west, technically, declination west should be stated as negative degrees, minutes, and seconds (or fractions of a degree).

So, if declination is greater than 42 degrees east, round down  ;-).  If declination is west, or 42 degrees or less east, round up.   Hmmmm........ .  Sure.

mcneely

mcneely

>
> --
> Jack "Rocket j Squirrel" Elliott
> Bend, Ore.
> 1984 Westfalia. A poor but proud people.
> 1971 "Ladybug"-brand utility trailer ca. 1972 from a defunct company in
> San Clemente, Calif., now repurposed as The Westrailia.
>
> Sent from my kitchen.

--
David McNeely