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Since the early 1960's, the DMAHTC/GSS has been conducting gravity surveys in support of the various Department of Defense (DoD) weapon systems. The surveys have been conducted worldwide, on nearshore areas and on land. A variety of supporting positioning systems have been utilized. Gravity Survey Techniques and Data Reduction programs have been developed to process vast quantities of gravity data. The DMAHTC/GSS has been a world leader in establishing gravity base station networks and in writing the first set of gravity survey standards and field survey specifications for land and marine gravity surveys. (Author)