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considered five phases to be conducted on the photograph (figure 4, page 83). * The first phase involved photo sci- entists who digitally reproduced the image, then digitally enhanced it by applying computer algorithms and tech- niques. The photographic imagery obtained from the U.S. Navy Historical Center was digitized into a computer software image file. Next an edge- sharpening algorithm was applied to the overall image scene. The subject area and the anomaly were then digitally magnified by a factor of 200, 400 and 800 percent. Each magnification was analyzed to determine which magnifica- tion would best maintain image integri- ty. * The second phase was to establish the chronology of the photograph. Smoke clouds and debris can be seen rising from Hickam Airfield obscuring most of it. This indicates the photo- graph was taken shortly after one initial attack run on Hickam, which occurred at 0755 hours on December 7, 1941. Smoke can be seen rising from the USS HELENA and the USS OGLALA. This indicates that at least one, if not both ships had been hit. The log of the Hele- na was very specific about the time she was struck by a torpedo at 0758 hours. Dan Martinez, the Park Historian at the USS ARIZONA Memorial, provided the time of the torpedo strike on the HELE- NA. History documented the first wave of torpedo bombers attacking Battleship Row within minutes of the attack on Hickam Airfield. Photo evidence shows that the first torpedo strike against Bat- tleship Row (USS CALIFORNIA, USS OKLAHOMA, USS WEST VIR- GINIA) has been completed. The CAL- IFORNIA had been struck by one torpe- do and was leaking oil, the OKLA- HOMA had been torpedoed and was lis- tening to Port and the WEST VIR- GINIA had been struck with at least one torpedo as indicated by several torpedo wakes. The first attack on Battleship Row took place at 0758 hours. * The third phase was to investigate the photograph for observable objects, which would lend themselves to the presence of a midget submarine. The digital image was examined and digital- ly interpreted for visual observables to support the premise that a Japanese Type-A class midget submarine was present in the area during the attack. Figure 5 shows that a rectangular, black object is present in the area. The object appears to be sitting on top of a dark lin- ear structure. The composite shape is surrounded by white water area, which looks as though a wave is about to cover the rectangular object. Two distinct water spray rooster tails appear behind April, 2000 the first two. Each rooster tail appears to coincide with the passing of each shock wave. The height characteristic of these rooster tails grows toward the anomaly with the smallest tail occurring first, or being the oldest. * The fourth phase involved the pre- cise set of photographic measurements of the anomaly in the image. Two photo objectives must be achieved by a pho- togrammetric approach. First, the loca- tion of the anomaly in the geographic reference; second, the position of the anomaly relative to the battleships in the field view. The second objective was to determine the height and size of the anomaly. To achieve these objectives, the position and altitude of the camera used by the gunner/observer in the "Kate" must be defined by using at least photogrammetric triangulation. The location of the anomaly was established by measuring the pixel location of the anomaly. Several objects with known location were also measured to establish the validity of the triangulation resec- tion. 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