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 41°29.8' on 11 January. The index error is 2.4' off the arc. The height of eye is 68 feet. What is the observed altitude (Ho)?

A 41°39.4'

B 41°36.4'

C 41°42.0'

D 41°44.5'

AI Explanation

The correct answer is A) 41°39.4'. To calculate the observed altitude (Ho), we need to apply the following formula: Ho = hs + IE + (2.04 / √h) Where: - hs is the sextant altitude (41°29.8') - IE is the index error (2.4' off the arc) - h is the height of eye (68 feet) Plugging in the values, we get: Ho = 41°29.8' + 2.4' + (2.04 / √68) = 41°32.2' + 7.2' = 41°39.4' The other options are incorrect because they do not accurately apply the formula to calculate the observed altitude (Ho) based on the given information.

Question 23Navigation Problems

You observe the lower limb of the Sun at a sextant altitude (hs) of 41°29.8' on 11 January. The index error is 2.4' off the arc. The height of eye is 68 feet. What is the observed altitude (Ho)?