ALTITUDE CORRECTION CHART
Corrections for altitude above or below altimeter readings of 450 meters.
Three values to be added to values from Table I.
EXAMPLE OF USE OF CHART
1100 + 900
Mean of altitude reading is
= 1000 meters.
Find intersection of 1000 M and wet bulb 60° F and interpolate between items,
giving approximately + 0.0007. Add this value to value obtained from Table I. 1.063
+ 0.0007 = 1.0637
Corrected altitude difference = (1100-900) (1.0637) = 212.74 M