Ex.26-1 An observation was made on a star lying west of the meridian at a place in latitude 40° 20' 36” N to determine the azimuth of the survey line AB. The mean observed altitude was 42° 10' 24” and the clockwise horizontal angle from AB to the star was 108° 18'48”. The declination of the star was 24° 54' 35”. Find the azimuth of the survey line AB.

Ex.26-2 A star was observed at western elongation at a station, A (latitude 54° 30' N and longitude 52° 30' W). The declination of the star was 62° 12' 21" N. The mean observed horizontal angle between a referring object, P and the star was in clockwise 65° 18' 04". Find the azimuth of the line AP.

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