while the ACUF Mexico basin with "Sigsbee deep" as an alternate name is given in the NGA database as 25° N 92° W. There are other features with BGN approved names in the region in recognition of this pioneer in deep ocean sounding and commander of the first true bathymetric survey of the Gulf of Mexico conducted while commanding USC&GS George S. Blake: Sigsbee Plain - 23° 30′ 00″ N 093° 00′ 00″ W Sigsbee Knolls - 23° 45′ 00″ N 092° 25′ 00″ W Sigsbee Escarpment - 26° 00′ 00″ N 092° 30′ 00″ W Notes References External links Deep Sea Drilling Project: Leg 10 of the Glomar Challenger GULF OF MEXICO SEAFLOOR Landforms of the Gulf of Mexico Oceanic basins of the Atlantic Ocean Abyssal plains