Each mark on the vertical scale has a value of 5 MIL (1 Mil is equivalent to an angle that can determine an object one meter in height at a distance of 1000 meters). Therefore, if a navigation chart gives the height of an object, by sighting on it and counting the number of MILs, you can determine how far away it is. Here are the two formulas:
To measure distance when the height Is known:
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USING THE COMPASS ILLUMINATOR
The BUSHNELL MARINE compass model comes with
low light conditions. (Incidentally, the compass is built
into the left tube of the binocular but the push button control for the light and the battery are located in the right tube. This was done to minimize the chance that electrical interference might affect compass performance.) When the ambient light does not permit you to see the compass
heading clearly, press the button atop the right tube. If the light is dim or does not come on, replace the batteries. If the light does not operate after replacing the batteries, please contact the Bushnell dealer nearest you.
OBJECT HEIGHT (M) X 1000 M = DISTANCE IN METERS
SCALE READING
To measure object height when the distance is known:
DISTANCE (M) X SCALE READING = OBJECT HEIGHT IN METERS
1000
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HOW TO CHANGE THE BATTERIES
To change the battery, use a thin coin to remove the battery cover by turning it
in the same direction. Replace the battery cover by turning it clockwise.
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