Small Aircraft
Flight Crew Instrument; Flight Crew Commercial; Flight Crew Multiengine
Flight Crew Last 90 Days 8; Flight Crew Total 280; Flight Crew Type 260
Human-Machine Interface; Situational Awareness
Deviation - Altitude Overshoot; Deviation - Track / Heading All Types; Deviation / Discrepancy - Procedural Clearance
Flight Crew Became Reoriented; Flight Crew Regained Aircraft Control; Flight Crew Returned To Clearance
Human Factors; Weather
I was on an IFR flight plan to SPG. During the descent into the airport in the IMC condition; ATC clears me to fly direct to IAF (Initial Approach Fix) JRGAL. I was not sure if the approach that I load in the GPS was correct; so I looked over to verify. When I looked back at the instrument; since it was a descent turn; I got disoriented. It took me two to three seconds to recover; however; I ended up heading 90 degrees to the right of my course and around 300 feet lower. I then informed ATC and continue to destination without other problems.
Pilot reported disorientation on a descending turn in IMC led to deviating from approach course.