Narrative:

Flight of 2 amphibious cessna's operating near washington dc ADIZ. Both pilots and aircraft operated in the immediate northward vicinity of the baltimore/washington ADIZ 7 days prior and were told during the FSS briefing (dec/thu/03) 'that if we remained clear of the class B, then we would remain clear of the ADIZ.' the flight originated at stafford (rmn) (outside the ADIZ) and terminated at summit, de (evy). A face to face FSS briefing was obtained that morning as the temporary FSS set-up at kitty hawk, but no updates were obtained prior to the last leg. The current baltimore/washington VFR tac chart was referenced, but no ADIZ was depicted outside of class B. No ADIZ or tfr was posted at the departure airport located approximately 6 NM outside of the ADIZ. The flight was originated and flown at 1200 ft (2300 ft below the nearest class B). Even at this altitude, the flight path was significantly altered to remain well clear of what we understood was the ADIZ (the class B boundary). Flight path took us north of R-6611A to avoid circumnaving the entire R-6611A, R-6613A complex and at this point, the baltimore/washington ADIZ was inadvertently penetrated. The pilots of both aircraft were unaware of a potential airspace violation until alerted by potomac approach at the terminal airport. Guard channel was monitored during the majority of the flight, albeit not during the time of the potential violation. Both pilots were experienced professional pilots and one had extensive experience operating in the baltimore/washington vicinity. Neither were aware that the ADIZ departed from the class B boundary, even after consulting the ADIZ depiction several days prior. Possible correction could result from depiction of ADIZ on the current baltimore/washington tac or mandatory posting of ADIZ in vicinity airports.

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Original NASA ASRS Text

Title: LCL C206 FERRY FLT IS ADVISED AFTER LNDG EVY OF DC ADIZ VIOLATION.

Narrative: FLT OF 2 AMPHIBIOUS CESSNA'S OPERATING NEAR WASHINGTON DC ADIZ. BOTH PLTS AND ACFT OPERATED IN THE IMMEDIATE NORTHWARD VICINITY OF THE BALTIMORE/WASHINGTON ADIZ 7 DAYS PRIOR AND WERE TOLD DURING THE FSS BRIEFING (DEC/THU/03) 'THAT IF WE REMAINED CLR OF THE CLASS B, THEN WE WOULD REMAIN CLR OF THE ADIZ.' THE FLT ORIGINATED AT STAFFORD (RMN) (OUTSIDE THE ADIZ) AND TERMINATED AT SUMMIT, DE (EVY). A FACE TO FACE FSS BRIEFING WAS OBTAINED THAT MORNING AS THE TEMPORARY FSS SET-UP AT KITTY HAWK, BUT NO UPDATES WERE OBTAINED PRIOR TO THE LAST LEG. THE CURRENT BALTIMORE/WASHINGTON VFR TAC CHART WAS REFED, BUT NO ADIZ WAS DEPICTED OUTSIDE OF CLASS B. NO ADIZ OR TFR WAS POSTED AT THE DEP ARPT LOCATED APPROX 6 NM OUTSIDE OF THE ADIZ. THE FLT WAS ORIGINATED AND FLOWN AT 1200 FT (2300 FT BELOW THE NEAREST CLASS B). EVEN AT THIS ALT, THE FLT PATH WAS SIGNIFICANTLY ALTERED TO REMAIN WELL CLR OF WHAT WE UNDERSTOOD WAS THE ADIZ (THE CLASS B BOUNDARY). FLT PATH TOOK US N OF R-6611A TO AVOID CIRCUMNAVING THE ENTIRE R-6611A, R-6613A COMPLEX AND AT THIS POINT, THE BALTIMORE/WASHINGTON ADIZ WAS INADVERTENTLY PENETRATED. THE PLTS OF BOTH ACFT WERE UNAWARE OF A POTENTIAL AIRSPACE VIOLATION UNTIL ALERTED BY POTOMAC APCH AT THE TERMINAL ARPT. GUARD CHANNEL WAS MONITORED DURING THE MAJORITY OF THE FLT, ALBEIT NOT DURING THE TIME OF THE POTENTIAL VIOLATION. BOTH PLTS WERE EXPERIENCED PROFESSIONAL PLTS AND ONE HAD EXTENSIVE EXPERIENCE OPERATING IN THE BALTIMORE/WASHINGTON VICINITY. NEITHER WERE AWARE THAT THE ADIZ DEPARTED FROM THE CLASS B BOUNDARY, EVEN AFTER CONSULTING THE ADIZ DEPICTION SEVERAL DAYS PRIOR. POSSIBLE CORRECTION COULD RESULT FROM DEPICTION OF ADIZ ON THE CURRENT BALTIMORE/WASHINGTON TAC OR MANDATORY POSTING OF ADIZ IN VICINITY ARPTS.

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.