September-October - Air Defense Artillery

ombined Correction Chart
~~r EITIPlaCj.nBg YouL reI )~)_tsenj'natnhetpCOSOj't'j.oonnsea'SSLj.genOednatordus M. Orman, Coast Artillery Corps
azimuth of 96° from DP to number four oun and a diso
are us a new problem and this is the novel way that it tance of 146 yards. From thiS chart the data appearing in
~assolved. The problem was created by the fact that num- Table I was tabulated. The elevation difference was com-
I' r8M was 146 yards from the DP of the battery, puted for each 1,000 yards of range for each ten degrees
a r ~~ gun. In addition it was forty feet below on of the field of fire. Obviously only 90° of the field of fire
II. n4s necessitated a height of site correction and need actually be tabulated as corrections in all other fields
va~jf..difference correction. The guns were G.P.F.'s are of the same magnitude differing only from each other
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ed ~th 1\118 sights. in sign.
otdiDary elevation difference chart was constructed Secondly, a height of site table was computed using firing
)wn m. FM 4-15). In our case the data used was an table 155-u-l, Fuze M51, supercharge for a negative height
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