Brunton ECLIPSE 8099 Manual De Instrucciones página 5

4. Locate declination scale.
5. Grasp black azimuth ring in one hand, and the vial in the other (figure 6).
6. Hold black azimuth ring stationary, and rotate vial until the arrow on the
points to the value of magnetic declination at your current position.
· Adjust orienting circle toward "EAST" for east declination and "WEST" for west declination.
3 – 1 Degree Graduated Dial
The 1° graduated dial has two scales, a
is for forward sighting and the black scale is for reverse sighting. The scale increments from 0° to
359°, where 0° indicates north. In addition, 90° indicates east, 180° is south and 270° is west.
Figure 7
4 – Field Bearing
The following instructions describe two methods of sighting a field bear-
ing – forward mirror sighting and reverse mirror sighting. Since there
are two methods and two scales, please follow instructions carefully for
each method.
4.1 Forward Mirror Sighting
This is the most accurate method of sighting a field bearing.
1. Determing and set the magnetic declination at your position.
· Refer to section 2.1, Magnetic Declination Adjustment, for help.
2. Open sight cover to 45°.
3. At eye-level, look through sight hole, and align object with the
sight hole, cover line and peep sight (figure 8).
blue
green scale and a black scale (figure 7). The
0
Sight Hole
6
4. Rotate azimuth ring until reflection of
in the mirror, outlines the
orienting circle · Make sure base is level and sighting lines and peep
sight are aligned.
5. Position the compass close enough to read field bearing
in magnified index lens.
· Read bearing from
line – 170° (figure 9).
green scale
Cover Line
6. Read field bearing from the black scale in the magnified
Peep Sight
index lens – 50° (figure 10).
5 – Direction Of Travel
When field bearing to a destination is already known, set
compass to the known field bearing, sight and travel to the
destination. The bearing you travel is known as the direction
of travel. This example uses forward mirror sighting.
1. Set magnetic declination.
2. Open sight cover to 45°.
Cover Line
3. Rotate azimuth ring until compass is set to a known field bearing ( 270° ), using the
Figure 8
in this example.
blue orienting circle,
red circled "N".
green scale at the green index
4.2 Reverse Mirror Sighting
Reverse mirror sighting is another method of sighting a
field bearing.
1. Find and set magnetic declination at your position.
2. Open sight cover to 120°.
3. Hold compass at waist-level, with sight cover pointing
towards you (figure 10).
4. Sight object in the mirror and align mirror line with the
reflection of the cover line.
5. Rotate azimuth ring until
surrounds the red circled "N".
· Make sure mirror line and reflection of cover line are
aligned with sighted object.
Mirror Line
Figure 10
7
350
170
Figure 9
blue orienting circle
Figure 11
green scale