You observe the lower limb of the Sun at a sextant... - USCG Navigation Problems

You 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.

Question 14Navigation Problems

You 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)?