refurbished KC-3's to 31 August 1967. Because of this delay, 
1370th Photo Mapping Wing flew simulated missions in late July. 
T-11 cameras were installed in an RC-130 aircraft and flown in 
the Forbes AFB area under light haze conditions. Nine rolls of 
film were exposed (3 Tri-X, 3 Plus X, and 3 IR) and later flown 
to Wright-Patterson AFB. Step wedges were exposed on each of the 
3 emulsions, which were then processed at 3 different gammas 
(0.9, 1.2, and 1.4) in 3 different Versamat chemistries man, "BU, 
and MX-641). The resulting photography was examined in detail by 
1370th Photo Mapping Wing personnel and forwarded to Army Map Service 
for additional study. Initial inspection indicated that good densities 
were obtained with IR film when exposed at 1/300 second at f/8 and 
processed to a gamma of approximately 1.2 in either MX-641 Chemistry 
or Type "B" Versamat Chemistry. Type "A" Versamat Chemístry was 
found to be unsuitable for infrared film because it caused the 
emulsion to bubble and peel away from its base. The Plus X film 
showed good density when exposed at 1/150 second at f/8 and processed 
to a gamma of 1.2 in either MX-641 or Type "B" Chemistry. It was 
agreed that the 1370th Photo Mapping Wing should use Type "B" Chemistry 
over MX-641 because of the water problem in Liberia. Results of 
sensitometric tests are summarized in Table I. 
Meanwhile, the two refurbished KC-3s' and the four new KC-8 
cameras had been delivered, installed, and flown at 14,000 feet 
and 21,000 feet at Forbes AFB. The rolls of IR 5424 film (exposed 
in the KC-8s') and Plus X 2401 film (exposed in the KC-3s') were 
processed as previously recommended and sent to Army Map Service