Question 812Navigation General70% to pass
There are seven sources of error in the marine sextant. Of the four errors listed, which one is adjustable?
AI Explanation
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.
Related Questions
#810 What causes the error of collimation with regards to the four adjustments to a sextant? #811 The horizon glass of a sextant is _______________.#813 For a well made and well maintained sextant, the maximum value of which correction is usually so small that it can be ignored? #814 Most GPS receivers use the Doppler shift of the carrier phase to compute _______________.#815 A sextant having an index error that is "on the arc" has a _______________.