shallow.xyz UTM x-easting y-northing meters north america is zone 13 false northing 50000 depth meters shallow.out lat long depth (decimal-degrees, meters) 4 nm north-south out to 100' depth evaluated using Corpscon from NGS National Geodetic Survey Source was survey by Navoceano March 2000, vessel unknown POC Gordon Wilkes Stennis copy provided by Bill Baxley, SFTF South Florida Testing Facility, Navy base Ft Lauderdale, NSWC