Narrative:

Departed pierce county VFR for abbotsfort, back course, and headed north. While opening my VFR flight plan with seattle radio in the air, I attempted to maintain cloud clearance for VFR. I was busy and I may have entered the 10000 ft/6000 ft/12 NM southern limits of the seattle class B airspace at 1800-2000 ft. I immediately descended to 1500 ft and headed over vashon island. This route has the tiw class D airspace to the west and the sea class B airspace to the northeast. At 1500 ft below the class B airspace, I may have entered the sea class B airspace on the western edge. I believe the sea class B has expanded of late to the west and I may have touched it. Both of these encroachments were driven by the world of GPS direct and following the magenta line. A strong urge to turn the aircraft toward the destination and skirt various airspace exists. I need to rethink my navigation skills and be more observant of sua.

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Original NASA ASRS Text

Title: C180 PLT INITIATES EVASIVE MANEUVER WHEN RECOGNIZING THAT HE MAY HAVE PENETRATED THE SEA CLASS B AIRSPACE WITHOUT AUTH.

Narrative: DEPARTED PIERCE COUNTY VFR FOR ABBOTSFORT, BC, AND HEADED N. WHILE OPENING MY VFR FLT PLAN WITH SEATTLE RADIO IN THE AIR, I ATTEMPTED TO MAINTAIN CLOUD CLRNC FOR VFR. I WAS BUSY AND I MAY HAVE ENTERED THE 10000 FT/6000 FT/12 NM SOUTHERN LIMITS OF THE SEATTLE CLASS B AIRSPACE AT 1800-2000 FT. I IMMEDIATELY DSNDED TO 1500 FT AND HEADED OVER VASHON ISLAND. THIS RTE HAS THE TIW CLASS D AIRSPACE TO THE W AND THE SEA CLASS B AIRSPACE TO THE NE. AT 1500 FT BELOW THE CLASS B AIRSPACE, I MAY HAVE ENTERED THE SEA CLASS B AIRSPACE ON THE WESTERN EDGE. I BELIEVE THE SEA CLASS B HAS EXPANDED OF LATE TO THE W AND I MAY HAVE TOUCHED IT. BOTH OF THESE ENCROACHMENTS WERE DRIVEN BY THE WORLD OF GPS DIRECT AND FOLLOWING THE MAGENTA LINE. A STRONG URGE TO TURN THE ACFT TOWARD THE DEST AND SKIRT VARIOUS AIRSPACE EXISTS. I NEED TO RETHINK MY NAV SKILLS AND BE MORE OBSERVANT OF SUA.

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.