AMPHIBIOUS ACR ACFT ENCOUNTERS PARASAILER AFTER TKOF.

Narrative

I WAS IN COMMAND OF FLT KEY WEST TO MIAMI. JUST AFTER TKOF (APPROX 300 FT) I BEGAN A R TURN; WHEN MY COPLT SAW THE PARASAILER BEING PULLED BY A BOAT. THE PARASAILER WAS ABOUT 400-500 FT HORIZLY FROM THE ACFT WHEN I INCREASED OUR RATE OF CLB SO AS TO PASS ABOVE HIM APPROX 300-500 FT. THE CONDITIONS OF THE DAY WERE CLR; VISIBILITY 10 MI; WIND 180/07. AFTER PRE TKOF CHKLIST WAS COMPLETED; WE CONTACTED THE TWR FOR CLRNC INTO THEIR ATA. KEY WEST INTL WAS USING RWY 27 WITH MOST OF TFC USING R TFC PATTERN; DUE TO THE MAJORITY OF TFC ARRIVING AND DEPARTING TO N AND NE (MIAMI). MY CONCERNS AFTER TKOF WERE TO MAKE A R TURN AND STAY LOW; SO AS TO AVOID ANY TFC COMING OUT OF THE ARPT. MOST OF MY CONCERNS; IN THE PAST; HAVE BEEN WATER CONDITIONS AND WIND; BOAT TFC AND AIR TFC; ONCE AIRBORNE. THIS HIGH WING (ENGS CLOSE TO THE COCKPIT) ACFT (AMPHIBIAN) MAKES IT DIFFICULT TO CLR MORE THAN SAY; 30 DEGS PRIOR TO THE TURN. A CONSTANT WATCH SHOULD BE MAINTAINED. ALSO; CLRING OF THE IMMEDIATE AREA IS A BIG PRIORITY PRIOR TO TKOF; SINCE THIS INCIDENT OCCURRED.