C210 pilot entered dc ADIZ without clearance or a discreet transponder code.

Attributes
ACN	608132
Time
Date	200402
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	navaid : dca.vor
State Reference	DC
Altitude	msl single value : 2500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pct.tracon tower : pbi.tower
Operator	general aviation : personal
Make Model Name	Cessna 310/T310C
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Flight Plan	VFR
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : multi engine pilot : commercial
Experience	flight time last 90 days : 4 flight time total : 558 flight time type : 24.5
ASRS Report	608132
Person 2
Affiliation	government : faa
Function	controller : approach
Events
Anomaly	airspace violation : entry non adherence : published procedure non adherence : far
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance Airspace Structure
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation
Situations
Airspace Structure	special use : dcadiz.othersua

Narrative:

Accidentally violated the baltimore, washington dc ADIZ when I misinterped the outer ring of adw class B airspace as being the outer limit of the baltimore, washington ADIZ southeast of dca. Note that the ADIZ airspace limit coexist with the washington tri-area class B airspace limits except for the area south of dca. Had this airspace been defined on either the baltimore-washington terminal area chart or washington sectional, I'm certain this event would not have taken place.

Original NASA ASRS Text

Title: C210 PLT ENTERED DC ADIZ WITHOUT CLRNC OR A DISCREET XPONDER CODE.

Narrative: ACCIDENTALLY VIOLATED THE BALTIMORE, WASHINGTON DC ADIZ WHEN I MISINTERPED THE OUTER RING OF ADW CLASS B AIRSPACE AS BEING THE OUTER LIMIT OF THE BALTIMORE, WASHINGTON ADIZ SE OF DCA. NOTE THAT THE ADIZ AIRSPACE LIMIT COEXIST WITH THE WASHINGTON TRI-AREA CLASS B AIRSPACE LIMITS EXCEPT FOR THE AREA S OF DCA. HAD THIS AIRSPACE BEEN DEFINED ON EITHER THE BALTIMORE-WASHINGTON TERMINAL AREA CHART OR WASHINGTON SECTIONAL, I'M CERTAIN THIS EVENT WOULD NOT HAVE TAKEN PLACE.

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.