Compass Error by Visual Range Practice Problem 2

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Compass Error by Visual Range Practice Problem 2
2. Your vessel is proceeding up a channel, and you see a pair of range lights that are in line ahead. The chart indicates that the direction of this pair of lights is 196° T, and the variation is 7° E. If the heading of your vessel at the time of the sighting is 192° per standard magnetic compass, what is the deviation?
a. 3° E
b. 3° W
c. 4° E
d. 4° W
Answer = b