Using The Compass - Tasco OffShore Manual De Instrucciones

When distance to the object is known, its size is determined as follows:
1. Count the reticle divisions occupied by the object
2. Rotate the Calculator Dial, so that the Angle Index Mark points to the number from the reticle scale .
3. Look at the Distance Scale, and fi nd your known distance to the object (for example, 4000 feet,
or 400 on the scale). The number on the Object Size scale that is opposite this distance indicates
the size of the object (for example, 100 feet). As mentioned previously, remember that the distance
and size scales are ratios, be sure to add the same number of zeros to the numbers on both scales
(10:400 / 100:4,000 / 1,000:40,000, etc)
III. Using the Compass
Offshore models 36 and 541 feature a built-in compass with illumination. The compass scale is
refl exed into the eyepiece and can be seen while looking through the binocular. Each scale division
equals 1° of azimuth.
To use the compass, hold the binocular in viewing position and focus on the object. While holding
steady on the object, note the compass reading that appears beneath the fi xed central index line.
The reading will indicate the magnetic direction to the object.
For use at night, locate and focus on an object in the normal manner and when ready to determine
azimuth, press the illuminator switch. The compass scale will be illuminated in red light for easy
viewing, without affecting your night vision.
Compass Scale as seen through right eyepiece
("0" beneath index line indicates heading is due north)
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