Brunton 9020 User Manual

Made Made Made in in in in U.S.A. Made U.S.A. U.S.A. U.S.A.
Basic Compass
Basic Basic Basic Compass Compass Compass Facts
The magnetic compass has been used as a direction-finding device
for thousands of years, ever since it was discovered that a
magnetized needle will point in a constant direction when left free to
rotate.
This is so because the earth is surrounded by a magnetic field, and
a magnetized object will orient itself to that field, given the
opportunity.
Specifically, it will align itself so that it points toward the earth's North
magnetic pole, The North magnetic pole is located near (but not
precisely at) the geographic North pole.
Primitive compasses consisted of an iron needle which had been
stroked with a magnetic rock and then suspended from a thread, or
struck though a piece of cork or wax and placed in a bowl of water.
Although these compasses were not very precise, they nonetheless
helped early explorers and navigators find their way from one point
on the earth's surface to another, by providing a constant direction
indicator.
Today's compasses work on the same principle, nut are far more
sophisticated. In addition to a freely turning magnetic needle, a
modern, high-quality compass will have a movable, calibrated dial
and a sighting system for use in obtaining accurate bearings. More
advanced compasses can also be adjusted to compensate for the
fact that the earth's magnetic poles are not located precisely at the
geographical poles. (The error caused by this difference is called
declination , and it varies depending upon your location.)
Facts
Facts Facts
The Brunton line of sportsman's compasses incorporates many
features first developed on our professional-grade instruments; they
are the finest popular-usage compasses available today.
Getting Getting to to to to Know Getting Know Know
Getting Know Your
Your Brunton sportsman's compass has numerous features which
make it easy to work with and increase its usefulness. Take a few
moments to study your compass, referring to the appropriate
diagram (below) and you will be able to understand the following
instructions with little or no difficulty.
Taking a a a a Bearing Taking Taking Taking
A bearing is the degree reading or direction from your position to
another object. Thus, if you were in the field and a mountain peak
was directly East of your position, the bearing of the mountain would
be 90°. If the peak were directly South, its bearing would be 270°.
(The term azimuth is sometimes used instead of bearing.)
To take a bearing hold the compass level in front of you. The
sighting line should be pointing toward the object on which you are
taking a bearing. (Fig. 2). With the sighting line pointing straight to
the object, carefully turn the dial until the orienting arrow and the
magnetic needle are lined up (Fig. 2A).
Your Your Brunton Brunton Compass Compass
Your Brunton Brunton Compass Compass
Bearing Bearing Bearing