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Reducing Sights Using Pub 249, Continued
Figure 9-16. Marine sextant altitude correction from the Air Almanac.
CORRECTIONS TO BE APPLIED TO SEXTANT ALTITUDE
REFRACTION
To be subtracted from sextant altitude (referred to as observed altitude in A.P. 3270)
Figure 9-17. Excerpt from refraction correction tables of the
Air Almanac.
9-33
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