Question 1676Navigation General

The correct answer is B) 03°15.8'. The observed altitude (Ho) is calculated by applying the appropriate corrections to the sextant altitude (hs) of 03°35.5'. The corrections include the index error (0 in this case), the dip correction for the height of eye (32 feet), and the refraction correction based on the air temperature (-10°C) and barometric pressure (1010 millibars). When these corrections are applied, the observed altitude (Ho) becomes 03°15.8'. The other options are incorrect because they do not properly account for the given environmental conditions and height of eye, which are necessary to accurately determine the observed altitude (Ho).