Inner Circle Reading of the Double Vernier of a Transit

Problem
Figure P-SF01 is a double vernier of a transit and the dashed line indicate the two sets of coincident lines. What is the reading of the inner circle?
 

01-008-vernier-circle-reading.gif

 

A.   175° 42' C.   184° 18'
B.   193° 8' D.   181° 3'

 

Solution

 

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