PVT PLT OF SMA ENTERED CLASS C AIRSPACE.

Narrative

ON APR/SUN/94 I DEPARTED DAVIS (2D8) ON RWY 27 IN A C172 WITH MY 2 CHILDREN ON BOARD FOR A PLEASURE FLT TO MT PLEASANT; MI (MOP). UPON DEP I IMMEDIATELY MADE LEFT TFC REMAINING AT 1400 MSL ON THE DOWNWIND WITH MY XPONDER AT 1200 ALT RPTING AND MONITORING UNICOM 122.8 I SUBSEQUENTLY TURNED BASE AND HEADED NBOUND. UPON XING THE NORTHERN BOUNDARY OF THE BASE LEG: I SWITCHED FREQS TO LANSING DEP AND BEGAN A CLB AT APPROX 500 FPM. UPON CLBING I CONTACTED ATC WITH ATIS; DEST; INTENDED RTE OF FLT (VICTOR AIRWAY); AND INTENDED ALT (5500 MSL). A VERY ABRUPT RESPONSE CAME FROM THE CTLR TO EXIT THE AREA. I GUESS I DID NOT PICK UP THE INSTRUCTION; BECAUSE AFTER TRYING TO ESTABLISH CONTACT AGAIN HE TOLD ME TO EXIT THE CLASS C AIRSPACE; AND THEN I BELIEVE HE GAVE ME A SQUAWK AND A VECTOR. I COMPLIED IMMEDIATELY WHEN GIVEN THE VECTOR. ON PREVIOUS DEPS FROM DAVIS UPON CLBOUT AFTER PASSING THE APCH PATH FOR 28L (KLAN); I HAVE SWITCHED FROM ADVISORY FREQ 122.80 TO KLAN DEP; MONITORED; THEN COMMUNICATED WITHOUT A PROB. THIS WAS DIFFERENT; AND MAYBE THAT'S WHERE THE CONFUSION MAY HAVE BEEN ON MY PART. I CANNOT RECALL AS TO WHEN I BROKE THROUGH THE 2100 MSL CLASS C OR IF I HAD VENTURED INTO THE 5 MI BOUNDARY 49/SFC. IF THE CTLR COULD HAVE BEEN MORE HELPFUL (I.E. DSND OR TURN EAST) RATHER THAN SIMPLY SAYING 'EXIT' IN AN ABRUPT MANNER; I WOULD HAVE COMPLIED IMMEDIATELY AS I DID WHEN VECTORED. I UNDERSTAND IT IS STILL NO EXCUSE FOR BEING IN CLASS C AIRSPACE WITHOUT AUTHORIZATION. I SHOULD POINT OUT ALSO THAT I HEARD HIM TELL ANOTHER PLT TO EXIT AS WELL; AND IT APPEARED BY THE CONGESTION ON THE FREQ THAT THERE WERE A LOT OF PLANES IN THE AREA TALKING WITH ATC. AFTER THAT I WAS INSTRUCTED TO PROCEED TO REQUESTED ALT AND CONTINUE ON MY OWN NAV (V233) AND I REMAINED ON DEP FREQ. SOMEWHERE ALONG THE WAY I MUST HAVE ADJUSTED THE RADIO VOLUME; BECAUSE OF MY CHILDREN HAVING HEADPHONES ON. I CANNOT RECALL AT WHAT POINT; NOR FOR HOW LONG; BUT I NOTICED THAT KLAN ATC HAD NOT HANDED ME OFF AND I WAS WELL N OF THEIR AREA. IN FACT; WITH THIS REALIZATION I NOTED THE RADIO HAD BEEN VERY QUIET. I TURNED THE VOLUME UP AND SURE ENOUGH I HEARD KLAN APCH DEP. REALIZING WHAT I HAD DONE I RADIOED TO KLAN OF MY RADIO PROB. THEY ASKED ME TO CALL THE TWR AND GAVE ME THE PHONE NUMBER. IMMEDIATELY UPON LNDG AT MOP; I CALLED AND I WAS APOLOGETIC REGARDING THE LOST COM AND I ADMITTED I SHOULD HAVE BEEN MORE ATTENTIVE TO THE RADIO SILENCE. THE SUPVR WHO SPOKE WITH ME THEN BROUGHT UP MY CLASS C AIRSPACE ENTRY; AND I WAS COOPERATIVE IN MY EXPLANATION. I DID NOT ASK HOW FAR INTO THE AIRSPACE I HAD VENTURED. FRANKLY; I WANTED TO BE COOPERATIVE; BUT I DID NOT WANT TO ENGAGE IN A DETAILED CONVERSATION OVER THE PHONE. MY OWN SOLUTION TO THIS INCIDENT IS TO BE MORE ATTENTIVE -- ESPECIALLY TO RADIO SILENCE; AND ALSO TO BE MORE COGNIZANT OF MY ALT WHEN CLBING OUT OF UNCTLED FIELD UNDER CLASS C AIRSPACE. ALSO; I MUST ALSO LEARN TO PAY ATTN EVEN THOUGH I HAD MY 2 CHILDREN ( 11 AND 6) ON BOARD FOR THE FIRST TIME. I WAS PROBABLY OVER CONCERNED FOR THEIR COMFORT.