  SOURCE UNKNOWN-- VISIBLE PILE CHARTED IN 1947. REVISED TO SUBMERGED ON 10TH EDITION (1/15/72) OF CHART 12266. POSITION SCALED FROM CHART 12266 IN APPROX. POS. LAT. 38-37-40N, LONG. 76-30-15W. (ENT 1/6/97, SJV)