M20P pilot entered dc ADIZ without clearance or a discrete transponder code.

Attributes
ACN	581877
Time
Date	200305
Day	Sun
Place
Locale Reference	airport : dca.airport
State Reference	DC
Altitude	msl single value : 2000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Operator	general aviation : personal
Make Model Name	M-20 J (201)
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : private pilot : instrument pilot : commercial
Experience	flight time last 90 days : 75 flight time total : 1500 flight time type : 1000
ASRS Report	581877
Person 2
Affiliation	government other
Function	other personnel other
Events
Anomaly	airspace violation : entry non adherence : published procedure non adherence : far
Independent Detector	atc equipment other atc equipment : radar other other : 2
Resolutory Action	none taken : detected after the fact
Consequence	faa : investigated faa : reviewed incident with flight crew
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was returning from miv to ezf VFR. I have a GPS in my plane with current card and being local am very careful with all of the various restrs. In particular I monitored the 30 mile separation from washington national closely -- the DME does not register at low altitudes in that sector so I used GPS and had greater than 30 miles separation when it was abeam. Knowing that other pilots had trouble with the ADIZ over the water near quantico, I continued west and south of brv VOR and approached ezf from the south over the rapahannock river. Upon landing I was told to call customs and then the pct FAA who said I had been four or five miles inside the ADIZ to which I politely but firmly expressed shock and disbelief and explained the above. I have been flying IFR to the maximum extent feasible in the dc area including flts into fme and W29 (and incidentally the 05/sun/03 morning flight from ezf to miv). I did not do so this time as there were some 20 plus departing at miv and felt comfortable with the route. I will do so in the future.

Original NASA ASRS Text

Title: M20P PLT ENTERED DC ADIZ WITHOUT CLRNC OR A DISCRETE XPONDER CODE.

Narrative: I WAS RETURNING FROM MIV TO EZF VFR. I HAVE A GPS IN MY PLANE WITH CURRENT CARD AND BEING LCL AM VERY CAREFUL WITH ALL OF THE VARIOUS RESTRS. IN PARTICULAR I MONITORED THE 30 MILE SEPARATION FROM WASHINGTON NATIONAL CLOSELY -- THE DME DOES NOT REGISTER AT LOW ALTS IN THAT SECTOR SO I USED GPS AND HAD GREATER THAN 30 MILES SEPARATION WHEN IT WAS ABEAM. KNOWING THAT OTHER PLTS HAD TROUBLE WITH THE ADIZ OVER THE WATER NEAR QUANTICO, I CONTINUED W AND S OF BRV VOR AND APCHED EZF FROM THE S OVER THE RAPAHANNOCK RIVER. UPON LNDG I WAS TOLD TO CALL CUSTOMS AND THEN THE PCT FAA WHO SAID I HAD BEEN FOUR OR FIVE MILES INSIDE THE ADIZ TO WHICH I POLITELY BUT FIRMLY EXPRESSED SHOCK AND DISBELIEF AND EXPLAINED THE ABOVE. I HAVE BEEN FLYING IFR TO THE MAXIMUM EXTENT FEASIBLE IN THE DC AREA INCLUDING FLTS INTO FME AND W29 (AND INCIDENTALLY THE 05/SUN/03 MORNING FLT FROM EZF TO MIV). I DID NOT DO SO THIS TIME AS THERE WERE SOME 20 PLUS DEPARTING AT MIV AND FELT COMFORTABLE WITH THE RTE. I WILL DO SO IN THE FUTURE.

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.