SR20 PLT PENETRATES DC ADIZ FROM VICINITY OF BRV VORTAC AND NYG AIRBASE.

Narrative

I INADVERTENTLY VIOLATED THE WASHINGTON DC ADIZ BY 3 OR 4 NM THIS MORNING. THIS IS ESPECIALLY EMBARRASSING BECAUSE I AM BASED AT AN ARPT; GAI; WHICH IS WITHIN THE ADIZ; AND I AM VERY WELL FAMILIAR WITH SECURITY PROCS FOR GOING INTO AND OUT OF THE ADIZ. THE IMMEDIATE REASON FOR MY ERROR WAS MY FAILURE TO REMEMBER/REALIZE/CLARIFY THAT THE SOUTHERN BORDER OF THE ADIZ; WHICH I VIOLATED; DOES NOT COINCIDE WITH THE DC CLASS B AIRSPACE; AS IT DOES ON THE NORTHERN SIDE; WHERE I MAKE NEARLY ALL MY FLTS. AS WITH MANY AVIATION INCIDENTS THERE WAS A CASCADING SERIES OF ERRORS AND PROBS. I LEFT MANTEO; MQI; THIS MORNING APPROX XA45 ON A VFR FLT; DEST GAI. BEFORE DEP; I FILED AN ADIZ ENTRY PLAN; AS IS REQUIRED. I STATED THE ENTRY POINT AS THE BRV VOR; AND THE PROPOSED ENTRY TIME AS XC15; WITH ALT 2500 FT. ABOUT 10 MINS AFTER TKOF; I CONTACTED NORFOLK APCH FOR CLRNC THROUGH THEIR CLASS C. THEY GAVE ME A SQUAWK; THEN HANDED ME OFF TO SUBSEQUENT CTLRS FOR FLT FOLLOWING. I REMAINED ON A CODE; WITH FLT FOLLOWING; UNTIL I WAS ABOUT 15 NM SE OF THE BRV VOR. AT THAT POINT; THE RICHMOND APCH CTLR TOLD ME: A) I WAS LEAVING HIS RADAR COVERAGE; B) I SHOULD SQUAWK VFR; AND C) IN 10 MI I SHOULD CONTACT POTOMAC ON 119.85. MY VFR SECTIONAL ALSO SHOWED 119.85 AS THE POTOMAC FREQ FOR APCHS NEAR BRV. STARTING ABOUT 6 NM SE OF BRV VOR; AND CONTINUING WHEN I PASSED BRV AND WENT ABOUT 4 NM NE OF THE VOR; I REPEATEDLY TRIED TO RAISE POTOMAC ON 119.85. I CALLED 6 OR 8 TIMES; EACH TIME SAYING MY TAIL NUMBER AND 'ADIZ CLRNC.' I COULD HEAR OTHER TFC ON THE FREQ BUT NEVER GOT A REPLY. AS I NEARED THE QUANTICO AIR BASE; NYG; I REALIZED THAT I WOULD START TO HAVE ADIZ AND CLASS B TROUBLE. I TRIED THE NEXT FREQ SHOWN ON THE CHART; 124.65; AND IMMEDIATELY MADE CONTACT. AT THIS SAME TIME; I CIRCLED SOUTHWARD -- AND CLBED FROM 2500-2700 FT; TO STAY ABOVE THE 2500 FT CEILING OF QUANTICO'S SPACE. THE POTOMAC CTLR ON 124.65 TOLD ME TO CONTACT QUANTICO. HE TOLD ME I WAS INSIDE THE ADIZ; AND I SHOULD PROCEED S AND RE-CONTACT HIM. 2 OR 3 MINS LATER; HE CALLED ME WITH A SQUAWK AND TOLD ME THAT I WAS NOW CLRED TO ENTER. THE REST OF THE FLT WAS UNEVENTFUL. ON LNDG; I WAS TOLD BY THE FBO THAT POTOMAC TRACON WANTED ME TO CONTACT THEM. I WAS FUNDAMENTALLY TO BLAME HERE FOR NOT CLARIFYING THAT THE ADIZ BORDER EXTENDED FARTHER S THAN THE CLASS B. THE MAIN CULPRIT WAS COMPLACENCY. I HAVE MADE PROBABLY 100 XINGS OF THE NORTHERN ADIZ BORDER; AND I DID NOT INFORM MYSELF OF THE DIFFERENCE. THE COMPOUNDING FACTORS WERE MY DIFFICULTY IN MAKING CONTACT ON 119.85. A BIG SURPRISE TO ME IS THAT; MY DATABASE IN MY GPS WHICH IS CURRENT THROUGH DEC/THU/03 (1 WK AFTER THE INCIDENT); SHOWS THE CLASS B BORDER BUT NOT THE ADIZ BORDER. SO I TURNED S BEFORE I CAME TO THE CLASS B (I TURNED ABOUT 2 NM S OF QUANTICO) BUT NOT BEFORE I WAS IN THE ADIZ. I DO NOT KNOW WHAT SORT OF ENFORCEMENT ACTION THIS MIGHT LEAD TO. IT CERTAINLY HAS CONCENTRATED MY MIND ON BECOMING COMPLETELY FAMILIAR WITH SECURITY REQUIREMENTS.