You observe the lower limb of the Sun at a sextant altitude (hs) of 42°44.0' on 22 June. The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?

Question

You observe the lower limb of the Sun at a sextant altitude (hs) of 42&deg;44.0' on 22 June. The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?

Accepted Answer

Option C: 42&deg;51.7'. Observed altitude (Ho) is found by applying index error (off the arc is added), dip correction for a 70-foot height of eye, and semi-diameter to the sextant altitude, resulting in 42°51.7' per Bowditch tables.

You observe the lower limb of the Sun at a sextant altitude (hs) of 42&deg;44.0' on 22 June. The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?

You observe the lower limb of the Sun at a sextant altitude (hs) of 42°44.0' on 22 June. The index error is 0.8' off the arc. The height of eye is 70 feet (21.3 meters). What is the observed altitude (Ho)?