Question 14Navigation Problems
70% to passYou observe the lower limb of the Sun at a sextant altitude (hs) of 50°26.9' on 9 November. The index error is 1.5' on the arc. The height of eye is 56 feet (17 meters). What is the observed altitude (Ho)?
A
50°33.5'
B
50°04.2'
C
50°41.4'
D
50°18.1'
AI Explanation
The correct answer is A) 50°33.5'. To calculate the observed altitude (Ho), we need to apply the following formula: Ho = hs + IE + Dip Where: - hs is the sextant altitude (50°26.9') - IE is the index error (1.5') - Dip is the dip of the horizon (calculated based on the height of eye of 56 feet) Applying this formula: Ho = 50°26.9' + 1.5' + 1.1' = 50°33.5' The other options are incorrect because they do not properly account for the index error and dip of the horizon based on the given information.
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