The document compares the features of four different aircraft - the Grob 115 Tutor T.1, Grob 109 Vigilant T.1, Saab MFI-17 Supporter, and Cessna 152. It notes that the Tutor and Cessna 152 have low wings and tail planes, while the Vigilant has long wings and a T-tail. The Supporter has a high wing and tail plane mounted high on its fin with swept forward wings. The document also includes slides to test the identification of the different aircraft.