In addition, Cooper was familiar with important details, such as the appropriate flap setting of 15 degrees (which was unique to that aircraft), and the typical refueling time.
Sebagai tambahan, Cooper familiar dengan detail penting, seperti pengaturan kemiringan sayap sebesar 15º (yang sebenarnya jarang digunakan pada pesawat seperti itu) dan tipikal waktu pengisian bahan bakar.