0.5 miles, 270º T. from the US-Mexico Border Monument, San Diego County, California, USA, Southern California Bight, NE Pacific, R/V Velero IV Sta. 6422-59 (32º32'00''N, 117º07'45''W; provided geocoordinates slightly displaced southwards, corrected here to 32.5344, -117.1314); 7.2 m, medium gray sand