COMPUTING LATITUDE BY POLARIS USING THE NAUTICAL ALMANAC
Sample Problem #1
In 29 July 1981, your 1930 zone time DR position LAT 24-16.8'N LONG 164-26.0'E. At that time you observe Polaris with a sextant altitude (hs) of 23-46.8' and bearing 000.3° pgc the chronometer time of the sight is 08h 32m 18s, and the chronometer error is 02m 26s fast. The index error is 2.7' on the arc, and the height of eye is 56.0 feet. At the time of the observation the helmsman noted that he was heading 224 pgc and 244° psc. The variation 20W. What is your latitude by Polaris? And what is the deviation for that heading?
What is your latitude by Polaris?
A 24° 01.9'N
B 24° 19.5'N
C 24° 31.7'N
D 25° 19.6'N
Answer B
What is the deviation for that heading?
A 0.0°
B 1.5°W
C 3.0 W
D 4.5°W
Answer A
To see the work form go to "COMPLETE SOLUTION POLARIS # 1"
