Indian defence company HAL and Defense Research Organization DRDO are developing several aircraft for the IAF such as the HAL Tejas Mk2,[1][2] HAL TEDBF (naval aircraft),[224] HAL AMCA (5th generation aircraft),[225] DRDO AEW&CS (revived from the Airavat Project),[226] NAL Saras,[227] HAL HJT-36 Sitara,[228] HAL HTT-40, HAL Light Utility Helicopter (LUH),[229] DRDO Rustom[230] and DRDO Ghatak UCAV.[231] DRDO has developed the Akash missile system for the IAF[232][233] and also developed the Prithvi II ballistic missile.[234]