 HISTORY
  CL1135/71--08/30/71, USPS; THE WRECK OF THE PT. BROWNSVILLE IS LOCATED ON THE SOUTH SIDE OF SHIP CHANNEL.  IT IS IN SHALLOW WATER BUT IS A HAZARD TO SMALL BOATS AND SHOULD BE CHARTED.
  CL751/80--06/20/80, USPS; SHIPWRECK SHOWN SHOWN ON CHAR