Many variants are produced about the fighter’s lifespan. These have incorporated the T-45A, and that is a two-seat variant also used by the US Marines, and also the T-45C, an upgraded Variation using a glass cockpit and other augments, which currently serves to be a model for T-45s however in https://vuf.minagricultura.gov.co/Lists/Informacin%20Servicios%20Web/DispForm.aspx?ID=9114599