Narrative:

On a cross country flight from mlb to lal, cruising 4500 ft MSL, the visibility suddenly reduced to 3 mi. In my WX briefing from the FSS, I was informed of possible clouds few at 4000 ft later in the day, so I surmised that water vapor in the air was condensing to form mist and I would achieve better visibility by descending to 2000 ft. I descended to 2000 ft and observed no visibility to increase in addition to increased turbulence and a smoky smell. The turbulence caused me to be displaced to the left of my intended course. It is my guess that the turbulent smoky air was smoke from a brush fire that was not reported in my WX briefing. I was on the gif unicom frequency because I believed myself to be approaching that airport. I saw an airport in front of me, and realized that it was not winterhaven. Knowing the proximity of bartow's class D airspace, I immediately climbed back to 4500 ft. I, on my sectional, determined that the airport was indeed bartow, and it was possible that I could have incurred into their airspace. It is most likely that I never entered bartow's class D airspace due to fact that I never crossed a large round lake on its border, but the amount of lakes in the area and reduced visibility warrant filing this report. Supplemental information from acn 472361: after flying from medium large transport to lal and back, I noticed that my route of flight clipped the edge of orl's class B airspace in the winterhaven area. The brush fire I flew through caused me to fly across a lake that I observed after the flight to be in class B airspace.

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Original NASA ASRS Text

Title: PVT PLT SUSPECTS HE MAY HAVE ENTERED CLASS D AND CLASS B AIRSPACE ON A XCOUNTRY NEAR ORLANDO, FL, DURING VERY POOR VISIBILITY CONDITIONS.

Narrative: ON A XCOUNTRY FLT FROM MLB TO LAL, CRUISING 4500 FT MSL, THE VISIBILITY SUDDENLY REDUCED TO 3 MI. IN MY WX BRIEFING FROM THE FSS, I WAS INFORMED OF POSSIBLE CLOUDS FEW AT 4000 FT LATER IN THE DAY, SO I SURMISED THAT WATER VAPOR IN THE AIR WAS CONDENSING TO FORM MIST AND I WOULD ACHIEVE BETTER VISIBILITY BY DSNDING TO 2000 FT. I DSNDED TO 2000 FT AND OBSERVED NO VISIBILITY TO INCREASE IN ADDITION TO INCREASED TURB AND A SMOKY SMELL. THE TURB CAUSED ME TO BE DISPLACED TO THE L OF MY INTENDED COURSE. IT IS MY GUESS THAT THE TURBULENT SMOKY AIR WAS SMOKE FROM A BRUSH FIRE THAT WAS NOT RPTED IN MY WX BRIEFING. I WAS ON THE GIF UNICOM FREQ BECAUSE I BELIEVED MYSELF TO BE APCHING THAT ARPT. I SAW AN ARPT IN FRONT OF ME, AND REALIZED THAT IT WAS NOT WINTERHAVEN. KNOWING THE PROX OF BARTOW'S CLASS D AIRSPACE, I IMMEDIATELY CLBED BACK TO 4500 FT. I, ON MY SECTIONAL, DETERMINED THAT THE ARPT WAS INDEED BARTOW, AND IT WAS POSSIBLE THAT I COULD HAVE INCURRED INTO THEIR AIRSPACE. IT IS MOST LIKELY THAT I NEVER ENTERED BARTOW'S CLASS D AIRSPACE DUE TO FACT THAT I NEVER CROSSED A LARGE ROUND LAKE ON ITS BORDER, BUT THE AMOUNT OF LAKES IN THE AREA AND REDUCED VISIBILITY WARRANT FILING THIS RPT. SUPPLEMENTAL INFO FROM ACN 472361: AFTER FLYING FROM MLG TO LAL AND BACK, I NOTICED THAT MY RTE OF FLT CLIPPED THE EDGE OF ORL'S CLASS B AIRSPACE IN THE WINTERHAVEN AREA. THE BRUSH FIRE I FLEW THROUGH CAUSED ME TO FLY ACROSS A LAKE THAT I OBSERVED AFTER THE FLT TO BE IN CLASS B AIRSPACE.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.