  ****UNKNOWN SOURCE--  BETWEEN 1990 TO 1997, A NOTE LABELED: OBSTN, WITH A ARROW POINTING TO A LOCATION AT 45/05/46.62 - 87/35/27.16 WAS CHARTED.  (ENTERED CEH 6/05)

  F00511-- 2005;  A 200% SSS investigation was conducted and no sonar contacts were