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Officer in charge of range observers will note his judgment of reliability of each observation at time of recording it.

Short.

Average of mils observed by three observers.

with reference to line joining tug and target.

Beyond. Short.

1

3

Time.

No. of shot or volley.

Mils observed with range

rake by each observer.

Beyond.

M

1

2

3

49

Officer in charge of Range Observers.

NOTE. To compute the deviation in yards with reference to line joining tug and target multiply the average of the mils observed by the three observers by roba of the length of the towline in yards. Example. Suppose the observers to have reported the splash 100, 105, and 110 mils, respectively, beyond the target, and suppose the towline to be 290 yards long. The average of the observations is 105 mils, 105 X

30.45 yards.

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This form will be used by the officer in
charge of range observers for recording devia-
tions in mils observed with range rake and
the computed deviations in yards with respect
to the proper target and the line joining gun
and target.

The officer in charge of observers will date,
sign, and deliver his report, accompanied by his
computations of deviations in yards, to the fire
commander as soon as practicable after the
practice. Any one of Form 823 delivered will
contain data relating to one battery only.

This report will be filed with the copy of Form
819 filed with emplacement book, for one year
after the completion of the practice year in
which the firing took place.

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Three copies required, one to be retained, one forwarded by artillery district commander directly to Chief of Artillery, and one forwarded to department headquarters for the artillery inspector. These reports will be rendered at the conclusion of subcaliber practice for the quarter.

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