Your Electronic Plotting Aid (EPA) has automatic speed inputs from the log. Due to currents, the log is indicating a faster speed than the speed over the ground. What should you expect under these circumstances?

Correct Answer: Option D — The targets true course vector will be in error.

The EPA calculates a target's true course by vector addition of the target's relative motion and the vessel's own motion. If the input speed is incorrect due to current, the own-ship vector is erroneous, which directly corrupts the calculation of the target's true course and speed vectors.