INSTRUCTIONS FOR USE
View through the optical lens and aim at your target object or
direction of travel. With both eyes open, the hairline can be seen
to ‘stand up’ from the compass housing making it easy to
accurately read the correct bearing toward the object due to
optical illusion. (see figure 1). You can focus the lens on your
desired scale by turning the eyepiece. Choose between different
scales based on the labels in figure 1.
Bearings can also be taken using the OmniSight as an auxiliary
compass, but greater accuracy is always achieved when using the
optical sighting system. Simply level the compass in position to
view the dial from above and read the bearing at the lubber line.
BALANCE | INCLINATION
Earth’s vertical magnetic field has a tendency to incline compasses
and therefore instruments are balanced against the magnetic
inclination for the location of use. This allows the card to rest
horizontally and move without hindrance. Since the balance is
made in production, the location of use should correspond to the
particular balance of that OmniSight model. Designations for
equatorial zones are –ME and for Southern zones are –MS .
Northerly zones have no designation in the part number.
DECLINATION
OmniSight compasses are adjusted at the factory to magnetic
north with 1/2° precision. Geographic North differs from magnetic
North based upon your location on the globe. Bearing obtained with
the compass should be corrected with the local declination
or variance.
N
E
W
S
180
190
200
170
150
140
130
210
220
230
240
250
270
280
290
300
310
320
0
350
340
330
10
20
30
40
50
60
70
80
90
120
100
110
160
MADE IN USA
DEGREES-360/R/QUADS/MILS
NW
NE
NW
NW
NW
NE
NE
NE
NW
NE
NE
NE
SE
SE
NE
NE
SE
SE
SE
NW
NW
SE
SE
SE
SE
sw
sw
sw
sw
sw
sw
sw
sw
NW
NW
sw
NW
NE
SW
SE
260
B R U N T O N
