Many variants happen to be developed around the fighter’s lifespan. These have involved the T-45A, and that is a two-seat variant also used by the US Marines, as well as T-45C, an upgraded Edition which has a glass cockpit and other augments, which currently serves for a design for T-45s https://www.metooo.co.uk/u/66ea98f7129f1459ee6c8459