You observe the lower limb of the Sun at a sextant altitude (hs) of 35°26.3' on 25 June. The index error is 1.5' on the arc. The height of eye is 58 feet (17.6 meters). What is the observed altitude (Ho)?

Correct Answer: Option B — 35°32.1'

Adjust hs 35°26.3' by subtracting 1.5' (on the arc) to get 35°24.8'. Subtract dip for 17.6m (-7.4') and add the June Sun altitude correction (+14.7'). The final Ho is 35°32.1'. This calculation adheres to the standard Bowditch methodology for reducing celestial observations to the observed altitude.