AH-64E
Formerly known as AH-64D Block III, in 2012, it was redesignated as AH-64E Guardian to represent its increased capabilities.[298][299][300] The AH-64E features improved digital connectivity, the Joint Tactical Information Distribution System, more powerful T700-GE-701D engines with upgraded face gear transmission to accommodate more power,[301] capability to control unmanned aerial vehicles (UAVs), full IFR capability, and improved landing gear.[302][303] New composite rotor blades, which successfully completed testing in 2004, increase cruise speed, climb rate, and payload capacity.[304] Deliveries began in November 2011.[305] Full-rate production was approved on 24 October 2012,[306] with 634 AH-64Ds to be upgraded to AH-64E standard and production of 56 new-build AH-64Es to start in 2019/20.[307] Changes in production lots 4 through 6 shall include a cognitive decision aiding system and new self-diagnostic abilities. The updated Longbow radar has an oversea capacity, potentially enabling naval strikes; an AESA radar is under consideration.[308] The E model is to be fit for maritime operations.[309] The Army has expressed a desire to add extended-range fuel tanks to the AH-64E to further increase range and endurance.[135] AH-64Es are to have the L-3 Communications MUM-TX datalink installed in place of two previous counterparts, communicating on C, D, L, and Ku frequency bands to transmit and receive data and video with all Army UAVs.