No other submerged lands of the United States have been studied as extensively as those bordering the Gulf Coast. Accurate knowledge of the physiography and character of the bottom is of prime importance in initial studies. The first hydrographic surveys of this area were begun by the United States Coast and Geodetic Survey in 1838. Prior to World War II, surveys were completed in the area extending from the Mexican border eastward to a line extending southward from Pensacola, Florida. Surveys employing a combination of electronic sounding and horizontal control techniques on the continental slope were initiated in 1947. At...

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