I have just flown my first flight using a Simbrief Flight Plan from KBFI to KTIW. I expected that the AP would follow the plan, but that did not happen. I had to “hand steer” the Cessna back on course. What am I doing wrong? [C172 Nighthawk. KBFI-KTIW. Test flight with Simbrief flightplan.…

I have…and here is my flight using a Simbrief flight plan… [Cessna Nighthawk. KBFI-KTIW. Successful test of GX1000 Simbrief Avionics plug.]