Question 812Navigation General

The correct answer is D) Error of collimation. The error of collimation is the only one of the four listed errors that is adjustable on a marine sextant. This error is caused by the misalignment of the telescope and the index mirror, and can be corrected through an adjustment procedure specified by the sextant manufacturer. The other errors - centering error, prismatic error, and graduation error - are inherent in the construction of the sextant and cannot be directly adjusted by the user. These errors must be accounted for through calibration and proper handling techniques.