Celestial Navigation, Episode 12: Planet Sights
Автор: The Nav Station
Загружено: 2021-07-24
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Practical Celestial Navigation: Planet sights, with two additional corrections to the sight reduction process
FOR A FULL LIST OF COURSE EPISODES, PLEASE REFER TO EPISODE 1.
1) Homework (CORRECTED):
August 29, 2021
DR 08 25.2'S / 60 05.8'E
14:25:16 GMT
Venus Hs 31 42.3'
IE 1.2' Off the arc
HE 15 ft
Correct the sight to get Ho (look for an additional altitude correction!). In the Nautical Almanac, find the GHA and Declination of Venus. Apply the Assumed Longitude to the GHA to calculate the LHA of Venus (+E. Long!). In the Sight Reduction Tables, find the final Hc and Zn and calculate the Intercept.
Ho 31 38.2'
GHA Venus 359 48.8'
LHA Venus 060
Assumed Position 08 S / 60 11.2'E
Hc 30 29'
Zn 268
Intercept 69.2 nm Toward
NOTE: This problem had numerous errors, all corrected now. In "real life" a sight with an Intercept of this magnitude would be discarded (or one would hunt for more errors!).
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