This document provides information about three different jet trainers: the BAE Hawk, Aermacchi MB-339, and Casa 101 Aviojet. It describes the key features of different variants of the BAE Hawk, including wing designs and the presence of ECM fins. Details are also given on the Aermacchi MB-339, such as its short rounded nose and optional wingtip tanks. The Casa 101 Aviojet is outlined as having a pointed nose and exhaust below the fin, with tall air intakes on the fuselage sides.