{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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