VFR into IMC

178 seconds 180 degree turn aeronautical decision making Cirrus CAPS cross-country flight safety DECIDE model FAR 91.155 flight safety flight training get-there-itis go no-go decision hazardous attitudes inadvertent IMC NTSB report PAVE checklist personal minimums plan continuation bias private pilot risk management scud running spatial disorientation VFR pilot safety VFR weather minimums weather decision making weather diversion