COAST ARTILLERY, JOURNAL - Air Defense Artillery

510 THE COAST ARTILLERY JOURNAL
the board was turned, interpolated (2-belI) data were received and
these data were for firing on a 2-bell ring preceding the time for 3.bell
data just mentioned. So the board when turned displayed:
a. Data for firing thirty seconds later, marked 3.
b. Data for firing fifteen seconds later, marked 2.
The recorder and pit commander could check the data marked 3 against
those showing on the mechanical display board. (See paragraph 19
below.)
FIG. 2
14. It will he noted that inyariahly the display board was turned
promptly on the last stroke of every 3-bell ring. In the earlier stages
of the drill, data for the I5-second hells frequently were not written
on the special display board at turning time, but data for the 30-second
or minute bell were ready as a rule. It should be noticed that new
data for the half-minute or minute rings appeared on the mechanical
display board a few seconds before the special display board was