On 22 August in DR position LAT 29°41.8'N, LONG 33°15.5'W, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 08h 00m 02s, and the chronometer error is 02m 20s slow. The sextant altitude (hs) is 74°32.4'. The index error is 1.5' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?

Question

On 22 August in DR position LAT 29&deg;41.8'N, LONG 33&deg;15.5'W, you take an ex-meridian observation of the Moon's upper limb at upper transit. The chronometer time of the sight is 08h 00m 02s, and the chronometer error is 02m 20s slow. The sextant altitude (hs) is 74&deg;32.4'. The index error is 1.5' off the arc, and your height of eye is 48 feet. What is the latitude at meridian transit?

Accepted Answer

Option C: LAT 29&deg;47.8'N. Determine GMT using chronometer time and error. Extract lunar ephemeris data, applying augmented semidiameter and parallax corrections for upper transit. Following Bowditch celestial procedures, compute the corrected altitude and apply declination to find LAT 29°47.8'N.