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Latitude by Local Apparent Noon (LAN), Continued
OPNAV 3130/35
ACTION
Completed Strip
LAN
Form
89° 60'
Enter 89° 60.0'.
89° 60.0
HO (-)
Enter Ho.
57° 26.3
Z Dist
Subtract Ho from 89 60.0.
32° 33.7’
True Dec
Enter True Dec.
N 3° 58.3
Lat
Use the following rules for making the
36°
32.0'
declination correction:
IF...
THEN...
Lat and Dec are of
Lat = Z dist - Dec
different names
Lat and Dec are of
Lat = Dec - Z dist
same names and Lat
is less than Dec
Lat and Dec are of
Lat = Z dist + Dec
same names and Lat
is greater than Dec
Time
12h 21m 00s
Closing
Remarks
Celestial navigation requires skill gained through experience. This
chapter has given you the basic knowledge required to meet the
minimum requirements of the Quartermaster occupational standards.
This is just the tip of the iceberg; you should strive to perfect your
celestial skills. In the event of a large scale war, you may find that all
electronic means of obtaining a fix have been knocked out. It’s
important that electronic fixes are compared to celestial fixes whenever
possible.
Remember, the prudent navigator uses all available means to
accurately fix the ship’s position along the intended track.
Quartermasters should study sources other than this RTM to gain
additional knowledge on celestial navigation. Dutton's Navigation and
Piloting is a excellent reference on this material.
9-40
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