Two boaters reportedly ran their boat aground in Chicago's Calumet Harbor Wednesday night.  Coast Guard Station Calumet Harbor says the initial report came in at 8:15pm but the boat was not in distress at that time.  Then a second call for help was radioed in early Thursday morning.  Petty officer 2^nd Class Levi  Read says the second call reported the boat taking on water.  At that time, Petty Officer Read said the Coast Guard's 25-foot RPS boat was sent out and arrived on scene at 1:27 a.m.  The water was too shallow for the RPS boat but the rescue continued as crews reached the boaters using a skiff, which Read said is not required gear to have aboard such a small rescue craft.  According to reports, the RB-S transported the two rescued boaters to Hammond Marina in Chicago shortly before 3:00 a.m.  The Coast Guard credits the boaters with knowing how to properly use their VHF-FM Marine radio alerting the Coast Guard station and the skiff
 being immediately available for a successful rescue.