Question 797Navigation General

The correct answer is B) IV, II, III, I. The order of sextant adjustments is important to ensure the instrument is properly aligned and providing accurate measurements. The correct order is as follows: 1. Set the index mirror perpendicular to the frame of the sextant (IV). This ensures the index mirror is properly positioned. 2. Set the horizon glass perpendicular to the frame of the sextant (II). This ensures the horizon glass is properly positioned. 3. Make the index mirror and horizon glass parallel when the index arm is set at zero (III). This aligns the two mirrors for accurate measurements. 4. Make the telescope parallel to the frame of the sextant (I). This ensures the telescope is properly aligned with the sextant. The other options are incorrect because they do not follow the proper sequence of adjustments required to ensure the sextant is accurately calibrated.