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- Q135 - Navigation Problems: Oceans
288. On 25 March your 0500 ZT DR position is LAT 28° 14.0' S, LONG 93° 17.0' E. You are on course 291° T at a speed of 16.0 knots. You observed 3 celestial bodies. Determine the latitude and longitude of your 0550 running fix. ZONE OBSERVED BODY TIME GHA ALTITUDE (Ho) DECLINATION ------------------- -------- ------------- ------------ --------------- Peacock 0520 226° 18.5' 49° 42.9' S 56° 47.6' Altair 0535 238° 38.2' 43° 53.1' N 8° 48.9' Spica 0550 338° 48.5' 21° 11.7' S 11° 03.8'
The correct running fix is determined by reducing each celestial sight to a line of position (LOP), advancing earlier LOPs along the dead reckoning track to a common time, and intersecting the resulting LOPs. This process yields a latitude of 28 15.9' S and a longitude of 92 56.9' E.
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