cannot currently fly and has no equipment inside such as GPS and navigation tools. Variants RQ-4A Initial production version for the USAF, 16 built. RQ-4B Improved version with increased payload, wingspan increased to and length increased to . Due to the increased size and payload the range is reduced to . RQ-4D Phoenix NATO Alliance Ground Surveillance (AGS). RQ-4E Euro Hawk Version for the Bundeswehr based on RQ-4B and equipped with an EADS reconnaissance payload for SIGINT. Germany canceled its order in May 2013; it received one of five Euro Hawks originally ordered. MQ-4C Triton For USN Broad Area Maritime Surveillance (BAMS) role; previously known as the RQ-4N; 4 ordered, 68 total planned. EQ-4B Equipped with the Battlefield Airborne Communications Node (BACN) system. KQ-X Proposed autonomous tanker variant. Model 396 Scaled Composites and Northrop Grumman also offered an armed, 50% smaller version of the RQ-4A, known as the Scaled Composites Model 396, as part of the USAF Hunter-Killer program. The aircraft was rejected in favor of the MQ-9 Reaper. Operators Republic of Korea Air Force – Ordered 4 in 2014. First aircraft delivered on 23 December 2019. Japan Air Self-Defense Force – Ordered 3 in November 2018, to be delivered by 1 September 2022. The purchase was made under a contract worth $USD1.2 billion. Alliance Ground Surveillance – Ordered 5 aircraft, first delivered 21 November 2019. United States Air Force Air Combat Command 319th Reconnaissance Wing – Grand Forks Air Force Base, North Dakota 319th Operations Group 7th Reconnaissance Squadron – Naval Air Station Sigonella, Italy 12th Reconnaissance Squadron – Beale Air Force Base, California 319th OG Detachment 1 – Andersen Air Force Base, Guam 348th Reconnaissance Squadron – Grand Forks Air Force Base, North Dakota 53d Wing 53d Test and Evaluation Group 31st Test and Evaluation Squadron – Edwards Air Force Base, California Air Force Reserve Command 940th Wing – Beale Air Force Base, California 940th Operations Group 13th Reconnaissance Squadron – Beale Air Force Base, California 380th Expeditionary Operations Group – Al Dhafra AB, United Arab Emirates since early 2002 RQ-4B (Block 30), RQ-4B (Block 40), EQ-4B (BACN), RQ-4A (BAMS-D) NASA Dryden Flight Research Center Accidents 29 March 1999: USAF RQ-4A 95-2002 crashed at China Lake Naval Weapons Center. 30 Dec 2001: USAF RQ-4A 98-2005 crashed while returning to al-Dhafra Air Base, UAE. 10 Jul 2002: USAF RQ-4A 98-2004 crashed near Shamsi AB, Pakistan due to engine failure.