Pilot of BE55 advised his VFR local flight had penetrated dca ADIZ without proper authorization.

Attributes
ACN	576021
Time
Date	200303
Day	Sat
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : anp.airport
State Reference	MD
Altitude	msl bound lower : 1500 msl bound upper : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pct.tracon
Operator	general aviation : personal
Make Model Name	Baron 55/Cochise
Operating Under FAR Part	Part 91
Flight Phase	other
Flight Plan	None
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 24750
ASRS Report	576021
Person 2
Affiliation	government : faa
Function	controller : flight data
Events
Anomaly	airspace violation : entry non adherence : far non adherence : published procedure non adherence other
Independent Detector	atc equipment other atc equipment : radar other controllera
Resolutory Action	flight crew : exited penetrated airspace none taken : detected after the fact
Consequence	faa : assigned or threatened penalties
Supplementary
Problem Areas	Navigational Facility Airspace Structure Flight Crew Human Performance FAA Chart Or Publication Environmental Factor
Primary Problem	FAA
Air Traffic Incident	Pilot Deviation
Situations
Airspace Structure	special use : dcadiz.othersua

Narrative:

Prior to departing W29 on a local flight, I reviewed a NOTAM issued on march/thur/2003. The NOTAM, referenced the airspace. Changes around washington dc and contained the perimeters of the recently imposed ADIZ. The previous restricted airspace around dc had been predicated on 2 DME of the dca VORTAC. I inadvertently assumed that the ADIZ boundary was predicated on the 30 DME arc of the same notamed area. It was never my intention to enter the ADIZ. It was outside of the notamed area. It was never my intention to enter the ADIZ. Prior to the NOTAM, W29 was not in class B airspace at 33.9 DME. The ambiguity lies in the NOTAM narrative, predicated on 30 DME from dca VORTAC. After landing W29 on a 1200 transponder code, I was identified within the ADIZ without an assigned squawk code. On this particular weekend there were over 35 incidents of the same nature due to the lack of clarity of the NOTAM in the dca area.

Original NASA ASRS Text

Title: PLT OF BE55 ADVISED HIS VFR LOCAL FLT HAD PENETRATED DCA ADIZ WITHOUT PROPER AUTHORIZATION.

Narrative: PRIOR TO DEPARTING W29 ON A LOCAL FLT, I REVIEWED A NOTAM ISSUED ON MARCH/THUR/2003. THE NOTAM, REFERENCED THE AIRSPACE. CHANGES AROUND WASHINGTON DC AND CONTAINED THE PERIMETERS OF THE RECENTLY IMPOSED ADIZ. THE PREVIOUS RESTRICTED AIRSPACE AROUND DC HAD BEEN PREDICATED ON 2 DME OF THE DCA VORTAC. I INADVERTENTLY ASSUMED THAT THE ADIZ BOUNDARY WAS PREDICATED ON THE 30 DME ARC OF THE SAME NOTAMED AREA. IT WAS NEVER MY INTENTION TO ENTER THE ADIZ. IT WAS OUTSIDE OF THE NOTAMED AREA. IT WAS NEVER MY INTENTION TO ENTER THE ADIZ. PRIOR TO THE NOTAM, W29 WAS NOT IN CLASS B AIRSPACE AT 33.9 DME. THE AMBIGUITY LIES IN THE NOTAM NARRATIVE, PREDICATED ON 30 DME FROM DCA VORTAC. AFTER LNDG W29 ON A 1200 TRANSPONDER CODE, I WAS IDENTIFIED WITHIN THE ADIZ WITHOUT AN ASSIGNED SQUAWK CODE. ON THIS PARTICULAR WEEKEND THERE WERE OVER 35 INCIDENTS OF THE SAME NATURE DUE TO THE LACK OF CLARITY OF THE NOTAM IN THE DCA AREA.

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.