On 7 May you observe Polaris for latitude at 0303 ZT.... - USCG Navigation Problems

On 7 May you observe Polaris for latitude at 0303 ZT. Your DR position is LAT 56°35.4' N, LONG 05°38.9' W. The sextant altitude is 56°11.1'. The height of eye is 36', and the index error is 3.3' off the arc. What is the latitude at the time of the sight?

A 56°35.0'N

B 56°38.7'N

C 56°24.6'N

D 56°32.6'N

AI Explanation

The correct answer is B) 56°38.7'N. To calculate the latitude at the time of the sight, we need to apply the altitude-latitude formula: Latitude = Altitude + (Refraction + Dip) - Sextant Altitude. Given: - Sextant Altitude: 56°11.1' - Height of Eye: 36' - Index Error: 3.3' off the arc Applying the formula: Latitude = 56°11.1' + (0.6' + 3.3') - 56°11.1' = 56°38.7'N The other options are incorrect because they do not correctly apply the altitude-latitude formula using the provided information.

Question 83Navigation Problems

On 7 May you observe Polaris for latitude at 0303 ZT. Your DR position is LAT 56°35.4' N, LONG 05°38.9' W. The sextant altitude is 56°11.1'. The height of eye is 36', and the index error is 3.3' off the arc. What is the latitude at the time of the sight?