Added areas 3357-61 and tfms 15851-56. Deprecated tfm 8496. For area 2172, added Sigsbee Escarpment and Amery Terrace to area of use. For area 2173, added Lund South, Florida Plain and Campeche Escarpment to area of use. For area 2174, added Tortugas Valley to area of use. For area 2374 added “US Gulf of Mexico (GoM) OCS” to area of use.