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Well, let's try a new one.
Suppose you occupy a station B and backsight a station A. You then turn an angle to station C but can't see it.
So you set station C', near station C, and observe to it.
You then occupy C', backsight C and turn to B.
That angle is 86-40-00.
The distance from C' to C is 12.05 feet.
From C to B is approximately 15,690 feet.
What correction to the angle at B must you apply to reduce the observation from station C' to station C?
I wonder what errata and trivia will show up now.
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