Pilot is intercepted and told he has violated P40, but his GPS printout says otherwise.

Attributes
ACN	578946
Time
Date	200304
Day	Sun
Local Time Of Day	0601 To 1200
Place
Locale Reference	special use airspace : p40.prohibited
State Reference	MD
Altitude	msl single value : 4500
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : pct.tracon
Operator	general aviation : personal
Make Model Name	Baron 58/58TC
Operating Under FAR Part	Part 91
Flight Phase	cruise : level
Route In Use	enroute : direct
Flight Plan	None
Aircraft 2
Operator	other
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Flight Phase	cruise : level
Route In Use	enroute : direct
Person 1
Affiliation	other
Function	flight crew : single pilot
Qualification	pilot : instrument pilot : multi engine pilot : private
Experience	flight time last 90 days : 25 flight time total : 2420 flight time type : 1700
ASRS Report	578946
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	airspace violation : entry
Independent Detector	other controllerb
Resolutory Action	none taken : anomaly accepted
Consequence	faa : investigated
Supplementary
Problem Areas	Flight Crew Human Performance ATC Human Performance Aircraft Airspace Structure
Primary Problem	Ambiguous

Narrative:

I contacted raleigh FSS to file 2 IFR legs and to obtain en route and area NOTAMS. The legs were clt-ric and ric-W05 (gettysburg).the only NOTAMS I received were parachute jumping at harcum and tower/light information at mdt (my W05 altitude). Both flts were completed successfully. I departed W05 VFR and squawking 1200. My intentions were to proceed southwest towards martinsburg and then fly down the valley towards winchester and eventually back towards richmond for a landing. I was intercepted by a us customs aircraft and told to land at leesburg, which I promptly did. A customs helicopter met me on the ground and informed me that I had violated restricted airspace. Since I was unaware on the NOTAM re: P40 I assumed he meant the ADIZ. I showed him my ground track on my handheld GPS was clear of both P40 and the ADIZ. The crew took my pilot information and inspected the aircraft registration and airworthiness cert. I departed shortly thereafter.

Original NASA ASRS Text

Title: PLT IS INTERCEPTED AND TOLD HE HAS VIOLATED P40, BUT HIS GPS PRINTOUT SAYS OTHERWISE.

Narrative: I CONTACTED RALEIGH FSS TO FILE 2 IFR LEGS AND TO OBTAIN ENRTE AND AREA NOTAMS. THE LEGS WERE CLT-RIC AND RIC-W05 (GETTYSBURG).THE ONLY NOTAMS I RECEIVED WERE PARACHUTE JUMPING AT HARCUM AND TOWER/LIGHT INFO AT MDT (MY W05 ALT). BOTH FLTS WERE COMPLETED SUCCESSFULLY. I DEPARTED W05 VFR AND SQUAWKING 1200. MY INTENTIONS WERE TO PROCEED SW TOWARDS MARTINSBURG AND THEN FLY DOWN THE VALLEY TOWARDS WINCHESTER AND EVENTUALLY BACK TOWARDS RICHMOND FOR A LNDG. I WAS INTERCEPTED BY A US CUSTOMS ACFT AND TOLD TO LAND AT LEESBURG, WHICH I PROMPTLY DID. A CUSTOMS HELI MET ME ON THE GND AND INFORMED ME THAT I HAD VIOLATED RESTRICTED AIRSPACE. SINCE I WAS UNAWARE ON THE NOTAM RE: P40 I ASSUMED HE MEANT THE ADIZ. I SHOWED HIM MY GND TRACK ON MY HANDHELD GPS WAS CLR OF BOTH P40 AND THE ADIZ. THE CREW TOOK MY PLT INFO AND INSPECTED THE ACFT REGISTRATION AND AIRWORTHINESS CERT. I DEPARTED SHORTLY THEREAFTER.

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.