PLT OF EXPERIMENTAL ACFT INADVERTENTLY ENTERED CLASS C AIRSPACE; PREOCCUPIED WITH THE GPS.

Narrative

I TOOK OFF FROM RWY 23 AT SPRUCE CREEK (7FL6) ARPT; PORT ORANGE; FL; AND INADVERTENTLY CLBED TO 2000 FT MSL. UPON REALIZING THAT I WAS STILL IN THE HIGHER OUTER CIRCLE OF DAYTONA BEACH ARPT; CLASS C AIRSPACE; I IMMEDIATELY REDUCED PWR AND DSNDED TO BELOW THE OUTER CIRCLE AIRSPACE LIMIT OF 1200 FT MSL. MY ATTN HAD BEEN DIVERTED WHILE I WAS DOING MY AFTER TKOF CHKLIST WHICH IS AN ELECTRONIC CHKLIST INSTALLED ON ONE OF THE PAGES OF MY GPS WITH MOVING MAP. TO ACCESS THIS CHKLIST REQUIRED CHANGING MY MAP PAGE TO NAV MENU 1 PAGE; THEN MOVING A CURSOR FOR CHKLIST AND SCROLLING DOWN TO THE AFTER TKOF LIST OF ITEMS; AND THEN EXECUTING THE STEPS -- PART OF WHICH IS TO CHK ENG PARAMETERS ON THE ENG MONITORING SYS. I THEN RETURNED TO THE MAP PAGE AND DISCOVERED I HAD NOT YET CLRED THE UPPER LIMIT CIRCLE OF THE CLASS C AIRSPACE (1200-4000 FT MSL). I ESTIMATED MY POS TO BE ABOUT 1 MI INSIDE THE CIRCLE FOR ABOUT 45 SECONDS; HEADED 230 DEGS. BECAUSE I WAS 800 FT HIGHER THAN ALLOWED; I FELT THE BEST CORRECTIVE MEASURE WAS TO DSND IMMEDIATELY. A CONTRIBUTING FACTOR WAS A LACK OF VISUAL REFS IN THIS LARGE AREA OF WETLANDS.