Editing Grumman E-2 Hawkeye (section)

===E-2D Advanced Hawkeye===
[[File:An E-2D Hawkeye flies over Naval Base Norfolk (13315193084).jpg|thumb|E-2D of [[VAW-125]] over [[Naval Station Norfolk|NS Norfolk]]]]

Once considered for replacement by the "[[Common Support Aircraft]]", this concept was abandoned. The latest E-2 version is the ''E-2D Advanced Hawkeye'', which features an entirely new avionics suite including the new {{anchor|AN/APY-9}}AN/APY-9 radar, radio suite, mission computer, integrated satellite communications, flight management system, improved T56-A-427A engines, a [[glass cockpit]] and [[aerial refueling]].<ref>{{cite news |last=Majumdar |first=Dave |date=2014-10-16 |title=Navy Declares IOC For E-2D Advanced Hawkeye |url=http://news.usni.org/2014/10/16/navy-declares-ioc-e-2d-advanced-hawkeye |work=US Naval Institute |access-date=2015-07-25 |archive-url=https://web.archive.org/web/20150724120529/http://news.usni.org/2014/10/16/navy-declares-ioc-e-2d-advanced-hawkeye |archive-date=July 24, 2015 |url-status=dead }}</ref><ref>{{cite web|url=https://www.northropgrumman.com/what-we-do/air/e-2d-advanced-hawkeye/ |title=E-2D Advanced Hawkeye |publisher=Northrop Grumman |date= |accessdate=2022-05-02}}</ref> The APY-9 radar features an [[active electronically scanned array]] (AESA),<ref name="Jennings">{{cite web|url=https://www.janes.com/defence-news/news-detail/us-approves-e-2ds-for-france|title=US approves E-2Ds for France|last=Jennings|first=Gareth|work=Janes.com|date=July 7, 2020 |publisher=Janes|access-date=29 March 2022}}</ref> which adds electronic scanning to the mechanical rotation of the radar in its radome. The E-2D includes provisions for the copilot to act as a "Tactical 4th Operator" (T4O), who can reconfigure his main cockpit display to show [[radar]], [[Identification friend or foe|IFF]], [[Link 16|Link 16 (JTIDS)]]/CEC and access all acquired data. The E-2D's first flight occurred on 3 August 2007.<ref>[http://www.irconnect.com/noc/press/pages/news_releases.html?d=124332 "Northrop Grumman E-2D Advanced Hawkeye Completes First Flight"] {{webarchive|url=https://web.archive.org/web/20070927180030/http://www.irconnect.com/noc/press/pages/news_releases.html?d=124332 |date=September 27, 2007}}. Northrop Grumman, 3 August 2007.</ref> On 8 May 2009, an E-2D used its [[Cooperative Engagement Capability]] system to engage an overland cruise missile with a [[RIM-174 Standard ERAM|Standard Missile SM-6]] fired from another platform in an integrated [[fire-control system]] test.{{cn|date=January 2024}} These two systems will form the basis of the Naval Integrated Fire Control – Counter Air (NIFC-CA) when fielded in 2015; the USN is investigating adding other systems to the NIFC-CA network in the future.<ref>{{cite news |url=http://www.dodbuzz.com/2014/05/22/navy-considers-its-beyond-the-horizon-future/ |title=Navy Considers it's Beyond-the-Horizon Future |last1=Osborn |first1=Kris |date=22 May 2014 |website=www.dodbuzz.com |publisher=Monster |access-date=23 May 2014 |archive-url=https://web.archive.org/web/20140524061831/http://www.dodbuzz.com/2014/05/22/navy-considers-its-beyond-the-horizon-future/ |archive-date=May 24, 2014 |url-status=dead}}</ref>

The [[AN/APY-9|APY-9]] radar has been suspected of being capable of detecting fighter-sized stealth aircraft, which are typically optimized against high frequencies like [[Ka band|Ka]], [[Ku band|Ku]], [[X band|X]], [[C band (IEEE)|C]] and parts of the [[S-band]]s. Small aircraft lack the size or weight allowances for all-spectrum low-observable features, leaving a vulnerability to detection by the [[UHF]]-band APY-9 radar, potentially detecting [[Fifth-generation jet fighter|fifth-generation fighters]] like the Russian [[Sukhoi Su-57]] and the Chinese [[Chengdu J-20]] and [[Shenyang J-31]]. Historically, UHF radars had resolution and detection issues that made them ineffective for accurate targeting and fire control; Northrop Grumman and Lockheed claim that the APY-9 has solved these shortcomings by using advanced electronic scanning and high digital computing power via space/time adaptive processing. According to the Navy's NIFC-CA concept, the E-2D could guide fleet weapons, such as [[AIM-120 AMRAAM]] and SM-6 missiles, onto targets beyond a launch platform's detection range or capabilities.<ref>[http://news.usni.org/2014/06/09/u-s-navys-secret-counter-stealth-weapon-hiding-plain-sight The U.S. Navy's Secret Counter-Stealth Weapon Could Be Hiding in Plain Sight] {{Webarchive|url=https://web.archive.org/web/20140709141815/http://news.usni.org/2014/06/09/u-s-navys-secret-counter-stealth-weapon-hiding-plain-sight |date=July 9, 2014}} – News.USNI.org, 9 June 2014</ref>

[[File:Northrop Grumman E-2D Hawkeye with inflight refueling probe in flight on 9 September 2019 (190909-N-PW480-0023).JPG|thumb|The first E-2D with aerial refueling capability was delivered in September 2019.]]
Deliveries of initial production E-2Ds began in 2010.<ref name=Continued_Success>[http://www.irconnect.com/noc/press/pages/news_releases.html?d=179988 "Northrop Grumman's E-2D Advanced Hawkeye Program Demonstrating Continued Success"] {{Webarchive|url=https://web.archive.org/web/20111124043050/http://www.irconnect.com/noc/press/pages/news_releases.html?d=179988 |date=November 24, 2011}}. Northrop Grumman, 9 December 2009.</ref> On 4 February 2010, Delta One conducted the first E-2D carrier landing aboard USS ''Harry S. Truman'' as a part of carrier suitability testing.<ref>{{cite web|url=http://www.asdnews.com/news/33350/NGC_s_E-2D_Advanced_Hawkeye_Completes_1st_Carrier_Landing.htm|title=NGC's E-2D Advanced Hawkeye Completes 1st Carrier Landing|work=asdnews.com|access-date=August 1, 2016|archive-url=https://web.archive.org/web/20110209023945/http://www.asdnews.com/news/33350/NGC_s_E-2D_Advanced_Hawkeye_Completes_1st_Carrier_Landing.htm|archive-date=February 9, 2011|url-status=dead}}</ref> On 27 September 2011, an E-2D was successfully launched by the prototype [[Electromagnetic Aircraft Launch System]] (EMALS) at [[Naval Air Engineering Station Lakehurst]].<ref>{{cite web |title= Navy's new electromagnetic catapult 'real smooth' |url= http://www.app.com/article/20110927/NJNEWS/309270121/Navy-s-new-electromagnetic-catapult-real-smooth- |publisher= Newbury Park Press |date= 28 September 2011 |access-date=2011-10-04}}</ref><ref>{{cite web |title= New carrier launch system tested |url= http://www.upi.com/Business_News/Security-Industry/2011/10/03/New-carrier-launch-system-tested/UPI-13601317652464/ |work= Security Industry |publisher= [[UPI]] |date= 3 October 2011 |access-date= 2011-10-04 |archive-url= https://web.archive.org/web/20111004172633/http://www.upi.com/Business_News/Security-Industry/2011/10/03/New-carrier-launch-system-tested/UPI-13601317652464/ |archive-date= October 4, 2011 |url-status= live}}</ref>  On 12 February 2013, the Office of the Secretary of Defense approved the E-2D to enter full-rate production. The Navy plans for an initial operational capability by 2015.<ref>[http://www.flightglobal.com/news/articles/pentagon-approves-e-2d-hawkeye-full-rate-production-382236/ Pentagon approves E-2D Hawkeye full rate production] {{Webarchive|url=https://web.archive.org/web/20130215094831/http://www.flightglobal.com/news/articles/pentagon-approves-e-2d-hawkeye-full-rate-production-382236/ |date=February 15, 2013}} – Flightglobal.com, February 12, 2013</ref> In June 2013, the 10th E-2D was delivered to the Navy, with an additional 10 aircraft in various stages of manufacturing and predelivery flight testing. On 18 July 2013, Northrop Grumman was awarded a $113.7 million contract for five full-rate production Lot 2 E-2D Advanced Hawkeye aircraft.<ref>[http://www.deagel.com/news/US-Navy-Orders-Five-Lot-2-Full-Rate-Production-E-2D-Advanced-Hawkeyes_n000011750.aspx US Navy Orders Five Lot 2 Full Rate Production E-2D Advanced Hawkeyes] {{Webarchive|url=https://web.archive.org/web/20140714220026/http://www.deagel.com/news/US-Navy-Orders-Five-Lot-2-Full-Rate-Production-E-2D-Advanced-Hawkeyes_n000011750.aspx |date=July 14, 2014}} – Deagel.com, 18 July 2013</ref> On 13 August 2013, Northrop Grumman was awarded a $617 million contract for five E-2Ds until full-rate production Lot 1.<ref>[http://www.navyrecognition.com/index.php?option=com_content&task=view&id=1185 Northrop Grumman Awarded $617 Million for Full-Rate Production E-2D Advanced Hawkeyes] {{Webarchive|url=https://web.archive.org/web/20130902204502/http://www.navyrecognition.com/index.php?option=com_content&task=view&id=1185 |date=September 2, 2013}} – Airrecognition.com, 13 August 2013</ref> On 30 June 2014, Northrop Grumman was awarded a $3.6 billion contract to supply 25 more E-2D, for a total contracted number of 50 aircraft; 13 E-2D models had been delivered by that time.<ref>[http://www.shephardmedia.com/news/digital-battlespace/us-navy-orders-additional-e-2d-aewc-aircraft/ US Navy orders additional E-2D AEW&C aircraft] {{Webarchive|url=https://web.archive.org/web/20140714141635/http://www.shephardmedia.com/news/digital-battlespace/us-navy-orders-additional-e-2d-aewc-aircraft/ |date=July 14, 2014}} – Shephardmedia.com, 1 July 2014</ref>

In December 2016, an E-2D flew for the first time fitted with an aerial refueling capability. This feature will allow the aircraft to double its time on station to five hours and increase total mission time from four to seven hours. The refueling modification will start being built into the 46th plane (out of 75 planned) for delivery in late 2020 costing an additional $2 million per aircraft and the Navy plans to retrofit the feature on all previous Hawkeyes for $6 million per plane.<ref>[https://www.defensenews.com/digital-show-dailies/navy-league/2018/04/11/northrop-to-begin-cutting-in-aerial-refueling-capability-in-e-2d-advanced-hawkeye-production-this-year/ Northrop to begin cutting in aerial refueling capability in E-2D Advanced Hawkeye production this year]. ''Defense News''. 11 April 2018.</ref>{{update inline|date=May 2021}}