According to official US Department of Army and Department of Navy casualty records, submitted to Congress in 1946 and updated in 1953, the combined possible total of missing service personnel worldwide is closer to approximately 6600 and probably considerably fewer. Since DPAA alone designates such WWII personnel as the crew of the USS Arizona and most of that of USS Oklahoma as both "missing" and "unaccounted-for" it is possible that DPAA records keeping may be somewhat idiosyncratic.