Several variants have been generated more than the fighter’s lifespan. These have incorporated the T-45A, which happens to be a two-seat variant also utilized by the US Marines, as well as T-45C, an upgraded Edition having a glass cockpit and other augments, which currently serves like a model for T-45s http://www.drugoffice.gov.hk/gb/unigb/kowear.com/american-fighter/