Numerous variants are made more than the fighter’s lifespan. These have incorporated the T-45A, which can be a two-seat variant also utilized by the US Marines, as well as T-45C, an upgraded version which has a glass cockpit and other augments, which currently serves as a model for T-45s nevertheless https://www.question2answer.org/qa/index.php?qa=user&qa_1=saltmuscle42