{4
for taking the pictures. This procedure was intended to
reduce the likelihood of unproductive on-site time which
would necessarily be charged to the shipbuilder. Once the
photogrammetrist arrived on site about mid-day, the
remainder of the day was spent inspecting the shipyard's
preparation work, setting up processing equipment, loading
film and exposing a few test shots if deemed desirable.
The following day. was spent in taking test shots if
considered necessary, taking the final photographs,
developing them, taping the reference distances and packing
equipment for the return to home base.
Figure 5 illustrates the camera stations employed.
inasmuch as the ship-halves were stationary, a single
camera was physically moved between the various
camera stations. Photographs taken from the air were
from a personnel carrier held by a crane and secured
by a tether line. A second line, marked with the
desired height of the camera station, was also dropped
from the personnel carrier. Approximately 45 minutes
(total elapsed time) was required to obtain all desired
exposures of each ship half. Of significance is that
ongoing shipyard work was not interrupted while the
photogrammetrist was performing his duties.
In keeping with standard procedure, all exposures
were developed immediately after they were taken to
assure satisfactory coverage and image quality. Normally
the photogrammetrist performs the processing in a
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