Gross (52I) is a public-use airport serving Pinconning, Michigan, at 618 feet above sea level, with CTAF 122.9. Its runways: 09/27 (3,300 × 90 ft, turf).
This diagram plots every runway from the FAA’s surveyed threshold coordinates, so it sits at true heading and true length — a gift for the pilots, students, instructors and families of 52I.