Skylane 182/RG Turbo Skylane/RG
Flight Crew Air Transport Pilot (ATP); Flight Crew Flight Engineer; Flight Crew Multiengine; Flight Crew Instrument; Flight Crew Flight Instructor
Flight Crew Last 90 Days 15; Flight Crew Total 26000; Flight Crew Type 1000
Situational Awareness
Aircraft Equipment Problem Less Severe; Airspace Violation All Types
Flight Crew Exited Penetrated Airspace
Aircraft; Human Factors
I was going to OLM VFR when my GPS froze and I had to grab my paper charts. I was under the Class B airspace south east of SEA-TAC (SEA) and east of McChord (TCM) and decided to go south and skirt around the MOAs where I may have inadvertently entered one.  Not sure.
C182 pilot experiences loss of GPS NAV capability while flying south bound beneath the SEA Class B airspace and believes he may have entered a MOA while attempting to navigate using paper charts.