Question 838Navigation General70% to pass
A marine sextant has the index arm set at zero and the reflected image of the horizon forms a continuous line with the actual image. When the sextant is rotated about the line of sight the images separate. The sextant has _______________.
AI Explanation
The correct answer is C) side error.
When the reflected image of the horizon forms a continuous line with the actual image and the images separate when the sextant is rotated about the line of sight, it indicates the sextant has a side error. Side error is caused by the index mirror not being perfectly perpendicular to the frame of the sextant.
The other options are incorrect because:
A) Prismatic error is caused by the index glass not being parallel to the horizon glass.
B) Centering error is caused by the center of the index mirror not being aligned with the center of the horizon mirror.
D) Error of perpendicularity is caused by the horizon mirror not being perfectly perpendicular to the frame of the sextant.
Related Questions
#836 You are attempting to locate your position relative to a hurricane in the Northern Hemisphere. If the wind direction remains steady, but with diminishing velocity, you are most likely _______________.#837 The winds with the greatest effect on the set, drift, and depth of the equatorial currents are the _______________.#839 You have replaced the chart paper in the course recorder. What is NOT required to ensure that a correct trace is recorded? #840 Which wind results from a land mass cooling more quickly at night than an adjacent water area? #841 In order to remove side error from a sextant, you should adjust the _______________.