Question 2Navigation Problems

The correct answer is B) 35°01.2'. To calculate the observed altitude (Ho), we need to apply the index error to the sextant altitude (hs). The index error is given as 2.0' off the arc, which means the sextant reading is 2.0' higher than the true altitude. Therefore, we need to subtract 2.0' from the sextant altitude (hs) of 34°51.4' to get the observed altitude (Ho), which is 35°01.2'. The other options are incorrect because they do not properly account for the index error of 2.0' off the arc. Option A) 35°03.6' is too high, Option C) 35°05.2' is too high, and Option D) 35°07.4' is too high.