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{{short description|1960 attack strike aircraft family by Grumman}}
{{Use American English|date=October 2013}}
{{Use dmy dates|date=February 2022}}
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{{Infobox aircraft
 |name= A-6 Intruder
 |image= File:Grumman KA-6D Intruder of VA-34 in flight, in 1988.jpg
 |caption= KA-6D Intruder of Attack Squadron 34 (VA-34 "Blue Blasters")
 |type= {{Plainlist|
* [[Attack aircraft]]
* [[Aerial tanker]] (KA-6D variant)}}
 |national_origin= United States
 |manufacturer= [[Grumman]]
 |designer=
 |first_flight= 19 April 1960
 |introduction= 1963
 |retired= 28 April 1993 (USMC) <br />28 February 1997 (USN)
 |primary_user= [[United States Navy]]
 |more_users= [[United States Marine Corps]]
 |number_built= 693 <!--totals minus rebuilds-->
 |status= Retired from military use
 |produced= 1962–1992
 |variants=
 |developed_into= [[Northrop Grumman EA-6B Prowler]]
}}

The '''Grumman A-6 Intruder''' is an American [[twinjet]] all-weather [[attack aircraft]] developed and manufactured by American aircraft company [[Grumman|Grumman Aerospace]] and formerly operated by the [[United States Navy|U.S. Navy]] and [[United States Marine Corps|U.S. Marine Corps]].

It was designed in response to a 1957 requirement issued by the [[Bureau of Aeronautics]] for an all-weather [[attack aircraft]] for Navy long-range interdiction missions and with [[STOL|short takeoff and landing (STOL)]] capability for Marine close air support. It was to replace the [[piston-engine]]d [[Douglas A-1 Skyraider]]. The requirement allowed one or two engines, either turbojet or turboprop.<ref>https://archive.org/details/202417484a6intruder/page/n5/mode/2up, p. 3</ref> The winning proposal from Grumman used two [[Pratt & Whitney J52]] turbojet engines. The Intruder was the first Navy aircraft with an integrated airframe and weapons system. Operated by a crew of two in a [[Tandem#Side-by-side seating|side-by-side seating]] configuration, the workload was divided between the pilot and weapons officer (bombardier/navigator or BN). In addition to conventional munitions, it could also carry [[nuclear weapon]]s, which would be delivered using [[toss bombing]] techniques. On 19 April 1960, the first prototype made its [[maiden flight]].

The A-6 was in service with the United States Navy and Marine Corps between 1963 and 1997, during which time multiple variants were prototyped and produced. Two of the more successful variants developed were the [[EA-6B Prowler]], a specialized [[electronic warfare]] derivative, and the KA-6D tanker version.<ref>{{Cite web |title=K-90866 KA-6D Intruder tanker-Configured Aircraft |url=http://public2.nhhcaws.local/our-collections/photography/numerical-list-of-images/nhhc-series/nh-series/Other/K-90866.html |access-date=7 August 2024 |website=Naval History and Heritage Command |language=en-US}}</ref> It was deployed during various overseas conflicts, including the [[Vietnam War]] and the [[Gulf War]]. The A-6 was intended to be superseded by the [[McDonnell Douglas A-12 Avenger II]], but this program was ultimately canceled due to cost overruns. Thus, when the A-6E was scheduled for retirement, its precision strike mission was initially taken over by the [[Grumman F-14 Tomcat]] equipped with a [[LANTIRN]] pod.

==Development==
===Background===
As a result of the fair-weather limitation of the [[Propeller (aircraft)|propeller-driven]] [[Douglas A-1 Skyraider|A-1 Skyraider]] in the [[Korean War]] and the advent of turbine engines, the [[United States Navy]] issued preliminary requirements in 1955 for an all-weather [[aircraft carrier|carrier-based]] [[attack aircraft]]. The U.S. Navy published an Operational Requirements Document (ORD) for it in October 1956. It released a [[Request For Proposal]]s (RFP) in February 1957.<ref>Jenkins 2002, pp. 5–6.</ref> The RFP called for a 'close air support attack bomber capable of hitting the enemy at any time'. Aviation authors [[Bill Gunston]] and Peter Gilchrist observe that this specification was shaped by the service's Korean War experiences, during which air support had been frequently unavailable unless fair weather conditions were present.<ref name = "bomber 209">Gunston and Gilchrist 1993, p. 209.</ref>

In response to the RFP, a total of eleven design proposals were submitted by eight different companies, including [[Bell Helicopter|Bell]], [[Boeing]], [[Douglas Aircraft Company|Douglas]], [[Grumman]], [[Lockheed Corporation|Lockheed]], [[Glenn L. Martin Company|Martin]], [[North American Aviation|North American]], and [[Vought]].<ref>Jenkins 2002, pp. 6–7.</ref> Grumman's submission was internally designated as the ''Type G-128''.<ref name = "bomber 209"/> Following evaluation of the bids, the U.S. Navy announced the selection of Grumman on 2 January 1958. The company was awarded a contract for the development of their submission, which had been re-designated ''A2F-1'', in February 1958.<ref>Jenkins 2002, p. 7.</ref>

[[File:YA2F-1 tilting pipes NAN6-60.jpg|thumb|right|250px|YA2F-1 showing the original tilting tailpipes]]
Grumman's design team was led by Robert Nafis and Lawrence Mead, Jr.<ref name = "bomber 209"/> Mead later played a lead role in the design of the [[Lunar Excursion Module]] and the [[Grumman F-14 Tomcat]].<ref>[https://www.nytimes.com/2012/08/31/business/lawrence-mead-jr-aerospace-engineer-who-helped-design-a-6-bomber-dies-at-94.html?ref=science "Lawrence Mead Jr., Aerospace Engineer, Dies at 94."] ''The New York Times'', 30 August 2012.</ref> The team was spread between two sites, the company's manufacturing plant at [[Bethpage, New York|Bethpage]] and the testing facilities at [[Naval Weapons Industrial Reserve Plant, Calverton]]. During September 1959, the design was approved by the Mock-Up Review Board.<ref name = "bomber 209"/>

The A2F-1 design incorporated several cutting-edge features for the era. In the early 1960s, it was novel for a fighter-sized aircraft to have sophisticated avionics that used multiple computers. This design experience was taken into consideration by NASA in their November 1962 decision to choose Grumman over other companies like General Dynamics-Convair (the [[F-111]] had computerized avionics capabilities comparable to the A-6, but did not fly until 1964) to build the Lunar Excursion Module, which was a small-sized spacecraft with two onboard computers.{{citation needed|date=August 2011}}

===Test program===
The first prototype YA2F-1, lacking radar and the navigational and attack avionics, made its first flight on 19 April 1960,<ref>Jenkins 2002, p. 11.</ref><ref name="wapj12 p40">Dorr ''World Air Power Journal'' Spring 1993, p. 40.</ref> with the second prototype flying on 28 July 1960.<ref name="wapj12 p41">Dorr ''World Air Power Journal'' Spring 1993, p. 41.</ref>

The test program required to develop the aircraft took a long time. The very advanced navigation and attack equipment required a lot of development and changes had to be made to correct aerodynamic deficiencies and remove unwanted features.<ref>''Grumman Aircraft since 1929'', Rene J. Francillon, {{ISBN| 0 85177 835 6}}, p. 431</ref> Extending the [[Air brake (aeronautics)|air brakes]], which were mounted on the rear fuselage, changed the downwash at the horizontal [[tailplane]] which overloaded its actuator so the tailplane was moved rearwards by {{convert|16|in|cm}}. Later evaluation of the aircraft showed that the airbrakes were not effective enough in controlling the speed of the aircraft and they were moved to the wing-tips.<ref>https://archive.org/details/202417484a6intruder/page/n5/mode/2up, p.5</ref> Early production aircraft were fitted with both the fuselage and wingtip air brakes, although the fuselage-mounted ones were soon disabled, and were removed from later aircraft.<ref name="wapj12 p41"/> The trailing edge of each wing-tip split to form a much more effective speed-brake which projected above and below the wing when extended.

The rudder needed a wider chord at its base to give greater exposed area to assist spin recovery.

A major difference between the first six production aircraft and subsequent aircraft were the jet nozzles; close-air support by the Marine Corps required STOL performance to operate from forward airstrips. Jet deflection using tilting tailpipes was proposed. The performance benefits from varying the angle were not worthwhile, whether operating from short strips or carriers, and they were fixed at a 7 degree downward angle.<ref>''Attack Aircraft of the West'', Bill Gunston 1974,{{ISBN|0 7110 0523 0}}, p. 225.</ref>

===Further development===
During February 1963, the A-6 was introduced to service with the US Navy; at this point, the type was, according to Gunston and Gilchrist, "the first genuinely all-weather attack bomber in history".<ref name = "bomber 210">Gunston and Gilchrist 1993, p.210.</ref> However, early operating experiences found the aircraft to be imposing very high maintenance demands, particularly in the Asian theatre of operations, and serviceability figures were also low. In response, the Naval Avionics Lab launched a substantial and lengthy program to improve both the reliability and performance of the A-6's avionics suite.<ref name = "bomber 210"/> The successful performance of the A-6 in operations following these improvements ended proposals to produce follow-on models that featured downgraded avionics.<ref name="Andrews">{{cite magazine |last=Andrews |first=Hal |title=Life of the Intruder |magazine=Naval Aviation News |volume=79 |issue=6 |date=September–October 1997 |pages=8–16}}</ref>

Various specialized variants of the A-6 were developed, often in response to urgent military requirements raised during the [[Vietnam War]].<ref name = "bomber 21011"/> The ''A-6C'', a dedicated interdictor, was one such model, as was the ''KA-6D'', a [[Aerial refueling#Buddy store|buddy store]]-equipped aerial refueling tanker. Perhaps the most complex variant was the [[EA-6B Prowler]], a specialized [[electronic warfare]] derivative. The last variant to be produced was the ''A-6E'', first introduced in 1972; it features extensive avionics improvements, including the new [[AN/APG-76#AN/APQ-148|APQ-148]] multimode radar, along with minor airframe refinements.<ref name = "bomber 21011">Gunston and Gilchrist 1993, pp. 210-211.</ref> The last A-6E was delivered in 1992.<ref>{{cite web |url = https://www.flightglobal.com/northrop-grumman/4209.article |title = Northrop Grumman |publisher = Flight International |date = 23 October 1996}}</ref>

During the 1980s, a further model, designated ''A-6F'', was being planned. Intended to feature the [[General Electric F404]] [[turbofan]] engine, as well as various avionics and airframe improvements, this variant was cancelled under the presumption that the in-development [[McDonnell Douglas A-12 Avenger II]] would be entering production before long.<ref name = "bomber 211">Gunston and Gilchrist 1993, p. 211.</ref><ref name = "flyint 2011">{{cite web |url = https://www.flightglobal.com/us-naval-aviation-back-on-the-rise/99159.article |title = US naval aviation back on the rise |publisher = Flight International |first = Stephen |last = Trimble |date = 4 April 2011}}</ref> Instead, a life-extension program involving the re-winging of existing A-6E aircraft was undertaken; initially a metal wing had been used before a [[graphite]]-[[epoxy]] [[composite material|composite]] wing was developed during the late 1980s.<ref name = "bomber 21112">Gunston and Gilchrist 1993, p. 211-212.</ref> Other improvements were introduced to the fleet around this time, including [[GPS]] receivers, new computers and radar sets, more efficient J-52-409 engines, as well as increased compatibility with various additional missiles.<ref name = "bomber 212">Gunston and Gilchrist 1993, p. 212.</ref>

==Design==
[[File:A-6E VA-34 landing on USS America (CV-66) 1983.JPEG|thumb|An A-6E landing on the aircraft carrier [[USS America (CV-66)]], showing the split airbrakes on the tips of its left wing]]

The Grumman A-6 Intruder is a two-seat twin-engined monoplane, equipped to perform carrier-based attack missions regardless of prevailing weather or light conditions.<ref name = "bomber 209"/> The cockpit used an unusual double pane windscreen and [[side-by-side seating]] arrangement in which the pilot sat in the left seat, while the bombardier/navigator (BN) sat to the right and slightly below to give the pilot an adequate view on that side. In addition to a radar display for the BN, a unique instrumentation feature for the pilot was a cathode ray tube screen that was known as the Vertical Display Indicator (VDI). This display provided a synthetic representation of the world in front of the aircraft, along with steering cues provided by the BN, enabling head-down navigation and attack at night and in all weather conditions.<ref name="Andrews"/>

The A-6's wing was relatively efficient at subsonic speeds, particularly when compared to supersonic fighters such as the [[McDonnell Douglas F-4 Phantom II]], which are also limited to subsonic speeds when carrying a payload of bombs. The wing was also designed to provide a favorable level of maneuverability even while carrying a sizable bomb load. A very similar wing would be put on pivots on Grumman's later supersonic [[swing-wing]] Grumman F-14 Tomcat, as well as similar landing gear.<ref>Gunston and Spick 1983, {{page needed|date=December 2019}}</ref>

For its day, the Intruder had sophisticated [[avionics]], with a high degree of integration.<ref name = "bomber 209"/> To aid in identifying and isolating equipment malfunctions, the aircraft was provided with automatic diagnostic systems, some of the earliest computer-based analytic equipment developed for aircraft. These were known as Basic Automated Checkout Equipment, or BACE (pronounced "base"). There were two levels, known as "Line BACE" to identify specific malfunctioning systems in the aircraft, while in the hangar or on the flight line; and "Shop BACE", to exercise and analyze individual malfunctioning systems in the maintenance shop. This equipment was manufactured by [[Litton Industries]]. Together, the BACE systems greatly reduced the Maintenance Man-Hours per Flight Hour, a key index of the cost and effort needed to keep military aircraft operating.{{citation needed|date=August 2011}}

The Intruder was equipped to carry nuclear weapons ([[B43 nuclear bomb|B43]], [[B57 nuclear bomb|B57]], [[B61 nuclear bomb|B61]]) which would have been delivered using semi-automated [[toss bombing]].

==Operational history==
{{More citations needed section|date=August 2011}}

===Entering service and Vietnam War===
[[File:Grumman A-6E Intruder of VA-65 on flight on 1 August 1983 (6392725).jpg|thumb|An A-6E Intruder aircraft assigned to {{USS|Dwight D. Eisenhower|CVN-69|6}}.]]
[[File:Several A-6 aircraft parked with EA-6 and S-3 aboard CV-67.jpg|thumb|[[Lockheed S-3 Viking|S-3A Viking]], A-6E Intruder, and an [[EA-6B Prowler]] aircraft are parked on the flight deck of aircraft carrier {{USS|John F. Kennedy|CV-67|6}} during a storm.]]

The Intruder received a new standardized [[United States Department of Defense|US DoD]] designation of ''A-6A'' in the Autumn of 1962, and entered squadron service in February 1963. The A-6 became both the U.S. Navy's and U.S. Marine Corps's principal medium and all-weather/night attack aircraft from the mid-1960s through the 1990s and as an aerial tanker either in the dedicated KA-6D version or by use of a [[buddy store]] (D-704). Whereas the A-6 fulfilled the USN and USMC all-weather ground-attack/strike mission role, this mission in the USAF was served by the [[Republic F-105 Thunderchief]] and later the [[General Dynamics F-111 Aardvark|F-111]], the latter which also saw its earlier F-111A variants converted to a radar jammer as the [[General Dynamics–Grumman EF-111A Raven|EF-111 Raven]], analogous to the USN and USMC EA-6B Prowler.

A-6 Intruders first saw action during the [[Vietnam War]], where the craft were used extensively against targets in [[Vietnam]].  The aircraft's long range and heavy payload ({{convert|18000|lb|kg|disp=or}}) coupled with its ability to fly in all weather made it invaluable during the war. However, its typical mission profile of flying low to deliver its payload made it especially vulnerable to anti-aircraft fire, and in the eight years the Intruder was used during the Vietnam War, the U.S. Navy and U.S. Marine Corps lost a total of 84 A-6 aircraft of various series. The first loss occurred on 14 July 1965 when an Intruder from [[Second VA-75 (U.S. Navy)|VA-75]] operating from {{USS|Independence|CV-62|6}}, flown by LT Donald Boecker and LT Donald Eaton, commenced a dive on a target near Laos. An explosion under the starboard wing damaged the starboard engine, causing the aircraft to catch fire and the hydraulics to fail. Seconds later the port engine failed, the controls froze, and the two crewmen ejected. Both crewmen survived.

[[File:Marine A-6 Intruder destroyed at Danang Airfield 1968.jpg|thumb|left|A U.S. Marine Corps A-6 Intruder destroyed by a rocket and mortar bombardment on [[Da Nang Air Base]] in 1968 during the [[Vietnam War]]]]
Of the 84 Intruders lost to all causes during the war, ten were shot down by [[surface-to-air missiles]] (SAMs), two were shot down by MiGs, 16 were lost to operational causes, and 56 were lost to conventional ground fire and [[anti-aircraft artillery|AAA]]. The last Intruder to be lost during the war was from [[Second VA-35 (U.S. Navy)|VA-35]], flown by LT C. M. Graf and LT S. H. Hatfield, operating from {{USS|America|CV-66|6}}; they were shot down by ground fire on 24 January 1973 while providing close air support. The airmen ejected and were rescued by a Navy helicopter. Twenty U.S. Navy aircraft carriers rotated through the waters of Southeast Asia, providing air strikes, from the early 1960s through the early 1970s. Nine of those carriers lost A-6 Intruders: {{USS|Constellation|CV-64|6}} lost 11, {{USS|Ranger|CV-61|6}} lost eight, {{USS|Coral Sea|CV-43|6}} lost six, {{USS|Midway|CV-41|6}} lost two, USS ''Independence'' lost four, {{USS|Kitty Hawk|CV-63|6}} lost 14, {{USS|Saratoga|CV-60|6}} lost three, {{USS|Enterprise|CVN-65|6}} lost eight, and USS ''America'' lost two.<ref>Hobson 2001, pp. 269–270.</ref> Although capable of embarking aboard aircraft carriers, most U.S. Marine Corps A-6 Intruders were shore based in [[South Vietnam]] at [[Chu Lai Air Base|Chu Lai]] and [[Da Nang Air Base|Da Nang]] and in [[Royal Thai Air Base Nam Phong|Nam Phong]], [[Thailand]].

===Lebanon and later action===
A-6 Intruders were later used in support of other operations, such as the [[Multinational Force in Lebanon]] in 1983. On 4 December, one [[LTV A-7 Corsair II]] and one Intruder were downed by Syrian missiles. The Intruder's pilot, Lieutenant Mark Lange, and bombardier/navigator Lieutenant [[Bobby Goodman|Robert "Bobby" Goodman]] ejected immediately before the crash;<ref>{{cite web |url= http://www.ejection-history.org.uk/PROJECT/YEAR_Pages/1983.htm#de |title= 4th December 1983 |author= <!--Staff writer(s); no by-line.--> |date= 23 June 2011 |website= The Year 1983 |publisher= Ejection History |access-date= 11 September 2013 |quote= A-6E TRAM BuNo 152915 coded AC, side number 556 VA-85 "Black Falcons" ... Near Kfar Salwan, 15 M E of Beirut, Lebanon, shot down by Syrian SAM-7 during bombing. Lt. Mark "Doppler" Lange ejected ... BN Robert O. "Bobby" Goodman ejected ... |archive-url= https://web.archive.org/web/20130921120145/http://www.ejection-history.org.uk/PROJECT/YEAR_Pages/1983.htm#de |archive-date= 21 September 2013 |url-status= dead }}</ref> Lange died of his injuries while Goodman was captured and taken by the Syrians to [[Damascus]] where he was released on 3 January 1984. Later in the 1980s, two [[United States Navy Reserve|Naval Reserve]] A-7 Corsair II light attack squadrons, [[VA-205 (U.S. Navy)|VA-205]] and [[VA-304 (U.S. Navy)|VA-304]], were reconstituted as medium attack squadrons with the A-6E at [[NAS Atlanta]], Georgia and [[NAS Alameda]], California, respectively.

Intruders also saw action in April 1986 operating from the aircraft carriers USS ''America'' and ''Coral Sea'' during the bombing of [[Libya]] ([[Operation El Dorado Canyon]]). The squadrons involved were [[VFA-34|VA-34]] "Blue Blasters" (from USS ''America'') and [[Second VA-55 (U.S. Navy)|VA-55]] "Warhorses" (from USS ''Coral Sea'').

[[File:A-6E Intruder preps for launch aboard CVN-65.jpg|thumb|An A-6E Intruder prepares for launch aboard {{USS|Enterprise|CVN-65|6}}]]
During the [[Gulf War]] in 1991, U.S. Navy and U.S. Marine Corps A-6s flew more than 4,700 combat sorties, providing close air support, destroying enemy air defenses, attacking Iraqi naval units, and hitting strategic targets. They were also the U.S. Navy's primary strike platform for delivering [[laser-guided bomb]]s.<ref name="A-6E Intruder">[http://collections.naval.aviation.museum/emuwebdoncoms/pages/doncoms/Display.php?irn=16028626&QueryPage=%2FDtlQuery.php "A-6E Intruder."] {{Webarchive|url=https://web.archive.org/web/20110722224741/http://collections.naval.aviation.museum/emuwebdoncoms/pages/doncoms/Display.php?irn=16028626&QueryPage=%2FDtlQuery.php |date=22 July 2011 }} ''National Museum of Naval Aviation.'' Retrieved: 16 December 2007.</ref> The U.S. Navy operated them from the aircraft carriers {{USS|Saratoga|CV-60|6}}, {{USS|John F. Kennedy|CV-67|6}}, USS ''Midway'', USS ''Ranger'', USS ''America'' and {{USS|Theodore Roosevelt|CVN-71|6}}, while U.S. Marine Corps A-6s operated ashore, primarily from [[Shaikh Isa Air Base]] in Bahrain. Three A-6s were shot down in combat by SAMs and AAA.<ref>Lee, Robin J. [http://www.rjlee.org/aaloss.html "Coalition Fixed-Wing Combat Aircraft Attrition in Desert Storm."] ''rjlee.org''. Retrieved: 8 July 2012.</ref>

The Intruder's large blunt nose and slender tail inspired a number of nicknames, including "Double Ugly", "The Mighty Alpha Six", "Iron Tadpole" and also "Drumstick".<ref name=Caldwell>Caldwell, Richard H. [http://www.coastcomp.com/av/fltline2/nickname.htm "US Military Aircraft Nicknames."] ''Flightline''. Retrieved: 11 April 2007.</ref>

Following the Gulf War, Intruders were used to patrol the no-fly zone in [[Iraq]] and provided air support for U.S. Marines during [[Operation Restore Hope]] in Somalia. The last A-6E Intruder left U.S. Marine Corps service on 28 April 1993.<ref name=USMCHistoryDiv>[http://www.tecom.usmc.mil/HD/Home_Page.htm "Homepage image caption for 10 April 2007."] {{webarchive|url=https://web.archive.org/web/20070408131859/http://www.tecom.usmc.mil/HD/Home_Page.htm |date=8 April 2007 }} ''United States Marine Corps History Division home page''. Retrieved: 11 April 2007.</ref>

Navy A-6s saw further duty over [[Bosnia and Herzegovina|Bosnia]] in 1994.

On 4 June 1996, during [[Exercise RIMPAC|RIMPAC]] a US Navy A-6E performing the unusual target towing task to train Japanese Navy air defense crews was mistakenly engaged and shot down by the Japanese destroyer [[JS Yūgiri]] with its [[Phalanx CIWS]] gun. Both the pilot and BN ejected and were recovered.<ref>{{cite web| url = https://www.latimes.com/archives/la-xpm-1996-06-05-mn-11915-story.html| title = Japanese Ship Accidentally Downs U.S. Jet - Los Angeles Times| website = [[Los Angeles Times]]| date = 5 June 1996}}</ref><ref>{{cite web| url = https://www.thedrive.com/the-war-zone/40937/the-last-time-a-japanese-warship-shot-down-a-u-s-navy-plane-was-actually-not-so-long-ago| title = The Last Time A Japanese Warship Shot Down A U.S. Navy Plane Was Actually Not So Long Ago| date = 4 June 2021}}</ref>

===Retirement===
Despite the production of new airframes in the 164XXX Bureau Number (BuNo) series just before and after the Gulf War, augmented by a rewinging program of older airframes, the A-6E and KA-6D were quickly phased out of service in the mid-1990s in a U.S. Navy cost-cutting move driven by the [[Office of the Secretary of Defense]] to reduce the number of different type/model/series (T/M/S) of aircraft in carrier air wings and U.S. Marine aircraft groups.

The A-6 was intended to be replaced by the [[McDonnell Douglas A-12 Avenger II]], but that program was canceled due to cost overruns.<ref>{{cite web |url = https://www.flightglobal.com/boeing-and-general-dynamics-to-appeal-against-ruling-in-a-12-case/73457.article |title = Boeing and General Dynamics to appeal against ruling in A-12 case |publisher = Flight International |date = 8 October 2007}}</ref> The Intruder remained in service for a few more years before being retired in favor of the [[LANTIRN]]-equipped [[Grumman F-14 Tomcat|F-14D Tomcat]], which was in turn replaced by the [[Boeing F/A-18E/F Super Hornet|F/A-18E/F Super Hornet]] in the U.S. Navy and the twin-seat [[McDonnell Douglas F/A-18 Hornet|F/A-18D Hornet]] in the U.S. Marine Corps. During the 2010s, the [[Unmanned Carrier-Launched Airborne Surveillance and Strike]] program was at one point intended to produce an [[unmanned aerial vehicle]] (UAV) successor to the Intruder's long-distance strike role, but the initiative has since changed priorities towards the tanker mission instead.<ref>{{cite web |url = https://www.flightglobal.com/northrop-grumman-wins-us-navy-unmanned-bomber-contract/75422.article |title = Northrop Grumman wins US Navy unmanned bomber contract |publisher = [[Flight International]] |first = Stephen |last = Trimble |date = 3 August 2007}}</ref> The last Intruders were retired on 28 February 1997.

Many in the US defense establishment in general, and [[Naval Aviation]] in particular, questioned the wisdom of a shift to a shorter range carrier-based strike force, as represented by the Hornet and Super Hornet, compared to the older generation aircraft such as the Intruder and Tomcat. However, the availability of USAF [[Boeing KC-135 Stratotanker]] and [[McDonnell Douglas KC-10 Extender]] tankers modified to accommodate USN, USMC and [[NATO]] tactical aircraft in all recent conflicts was considered by certain senior decision makers in the Department of Defense to put a lesser premium on organic aerial refueling capability in the U.S. Navy's carrier air wings and self-contained range among carrier-based strike aircraft. Although the Intruder could not match the F-14's or the F/A-18's speed or air-combat capability, the A-6's range and load-carrying ability are still unmatched by newer aircraft in the fleet.<ref name = "flyint 2011"/>

At the time of retirement, several retired A-6 airframes were awaiting rewinging at the [[Northrop Grumman]] facility at [[St. Augustine Airport]], Florida; these were later sunk off the coast of [[St. Johns County]], Florida to form a [[artificial reef|fish haven]] named "Intruder Reef".<ref>Hildebrandt, Erik. 1996–1997. "Burial at Sea: Navy's A-6 Intruder is Retiring, and What Could be a More Fitting End?" Air and Space Smithsonian. December 1996 – January 1997, Volume 11 (5). Pages 64–70. Also: [http://www.geocities.ws/Pentagon/Bunker/7316/burial.html "Burial at Sea."]</ref> Surviving aircraft fitted with the new wings, and later production aircraft (i.e., BuNo 164XXX series) not earmarked for museum or non-flying static display were stored at the [[309th Aerospace Maintenance and Regeneration Group|AMARG]] storage center at [[Davis-Monthan Air Force Base]], Arizona.<ref name="intruderassociation.org">[http://www.intruderassociation.org/a6displays.html "A-6 Displays."] {{webarchive|url=https://web.archive.org/web/20101118051510/http://www.intruderassociation.org/a6displays.html |date=18 November 2010 }} ''intruderassociation.org''. Retrieved: 19 July 2010.</ref>

==Variants==
{{More citations needed section|date=August 2011}}

===YA-6A and A-6A===
[[File:A-6As VMA(AW)-242 1975.jpeg|thumb|left|A-6A of VMA (AW)-242 in 1975]]

The eight prototypes and pre-production Intruder aircraft were sometimes referred to with the ''YA-6A'' designation.<ref name=Jenkins_p100>Jenkins 2002, p. 100.</ref> These were used in the development and testing of the A-6A Intruder.

The initial version of the Intruder was built around the complex and advanced ''DIANE'' (Digital Integrated Attack/Navigation Equipment) suite, intended to provide a high degree of bombing accuracy even at night and in poor weather. DIANE consisted of multiple [[radar]] systems: the [[Norden Systems]] [[AN/APQ-92]] search radar replacing the YA-6A's AN/APQ-88, and a separate AN/APG-46 for tracking, the AN/APN-141 radar altimeter, and an AN/APN-122 [[Doppler radar|Doppler navigational radar]] to provide position updates to the Litton AN/ASN-31 [[inertial navigation system]]. An air-data computer and the AN/ASQ-61 ballistics computer integrated the radar information for the bombardier/navigator in the right-hand seat. [[TACAN]] and [[Automatic Direction Finder|ADF]] systems were also provided for navigation. When it worked, DIANE was perhaps the most capable navigation/attack system of its era, giving the Intruder the ability to fly and fight in even very poor conditions (particularly important over [[Vietnam]] and [[Thailand]] during the [[Vietnam War]]). It suffered numerous teething problems, and it was several years before its reliability was established.

[[File:A-6B Intruder of VA-75 aboard USS Saratoga (CVA-60) in 1971.jpg|thumb|A-6B on the {{USS|Saratoga|CV-60|6}} in 1971]]
Total A-6A production was 480, excluding the prototype and pre-production aircraft.<ref name=Jenkins_p100/> A total of 47 A-6As were converted to other variants.<ref name=Jenkins_p100/>

===A-6B===
To provide U.S. Navy squadrons with a [[Suppression of Enemy Air Defenses|defense suppression]] aircraft to attack enemy anti-aircraft defense and SAM systems, a mission dubbed "[[Operation Iron Hand|Iron Hand]]" by the U.S. Navy, 19 A-6As were converted to ''A-6B'' version during 1967 to 1970.<ref name=Jenkins_p33>Jenkins 2002, pp. 33–41.</ref> The A-6B had many of its standard attack systems removed in favor of specialized equipment to detect and track enemy radar sites and to guide [[AGM-45 Shrike]] and [[AGM-78 Standard]] [[anti-radiation missile]]s, with AN/APQ-103 radar replacing earlier AN/APQ-92 used in the A-6A, plus AN/APN-153 navigational radar replacing earlier AN/APN-122, again used in the A-6A.

Between 1968 and 1977, several Intruder squadrons operated A-6Bs alongside their regular A-6As. Five were lost to all causes, and the surviving aircraft were later converted to ''A-6E'' standard in the late 1970s.

===A-6C===
[[File:A-6C VA-35 CVA-66 1972.jpg|thumb|A-6C of VA-35 ''Black Panthers'']]

12 A-6As were converted in 1970 to ''A-6C'' standard for night attack missions against the [[Ho Chi Minh trail]] in Vietnam. They were fitted with a "Trails/Roads Interdiction Multi-sensor" (TRIM) pod in the fuselage for [[FLIR]] and low-light TV cameras, as well as a "Black Crow" engine ignition detection system. Radars were also upgraded, with the AN/APQ-112 replacing the earlier AN/APQ-103, and an AN/APN-186 navigational radar replacing the earlier AN/APN-153. A vastly improved [[Sperry Corporation]] AN/APQ-127 radar replaced the AN/APG-46 fire control radar. One of these aircraft was lost in combat; the others were later refitted to A-6E standard after the war.

===KA-6D===
[[File:KA-6 F-14 DN-ST-87-10386.jpg|thumb|left|A KA-6D refueling an F-14A in 1987]]

To replace both the KA-3B and EA-3B Skywarrior during the early 1970s, 78 A-6As and 12 A-6Es were converted for use as [[Tanker (aircraft)|tanker]] aircraft, providing [[aerial refueling]] support to other strike aircraft. The DIANE system was removed and an internal refueling system was added, sometimes supplemented by a D-704 refueling pod on the centerline pylon. The KA-6D theoretically could be used in the day/visual bombing role, but it apparently never was, with the standard load-out being four fuel tanks. Because it was based on a tactical aircraft platform, the KA-6D provided a capability for mission tanking, the ability to keep up with strike aircraft and refuel them in the course of a mission. A few KA-6Ds went to sea with each Intruder squadron.  Their operation was integrated into the Intruder squadrons, as A-6 crew were trained to operate both aircraft and the NATOPS covered both the A6 and KA-6D. These aircraft were always in short supply, and frequently were "cross decked" from a returning carrier to an outgoing one. Many KA-6 airframes had severe G restrictions, as well as fuselage stretching due to almost continual use and high number of catapults and traps. The retirement of the aircraft left a gap in US Navy and Marine Corps refueling tanker capability. At least 16 KA-6Ds served in the [[Gulf War]].<ref>{{Cite web |date=1993 |title=Gulf War - Air Power Survey, Volume V |url=https://media.defense.gov/2010/Sep/27/2001329816/-1/-1/0/gulf_war_air_power_survey-vol5.pdf |access-date=13 September 2024 |website=U.S. Department of Defense}}</ref> The Navy [[Lockheed S-3 Viking]] filled that gap until the new F/A-18E/F Super Hornet became operational.

===A-6E===
[[File:A-6E Intruder over Spain in Operation Matador.jpg|thumb|An A-6E 'SWIP' Intruder of VA-34 flying over Spain during Exercise Matador.]]

The definitive attack version of the Intruder with vastly upgraded navigation and attack systems, introduced in 1970 and first deployed on 9 December 1971. The earlier separate search and track (fire control) radars of the A-6A/B/C were replaced by a single Norden AN/APQ-148 multi-mode radar, and onboard computers with a more sophisticated (and generally more reliable) IC based system, as opposed to the A-6A's DIANE discrete transistor-based technology. A new AN/ASN-92 inertial navigation system was added, along with the CAINS (Carrier Aircraft Inertial Navigation System), for greater navigation accuracy.

[[File:Last VA-34 A-6E Intruder launch from USS George Washington (CVN-73) on 22 July 1996 (6526829).jpg|thumb|left|Final VA-34 A-6E SWIP Intruder launch from the flight deck of {{USS|George Washington|CVN-73|6}}, 1996.]]
Beginning in 1979, all A-6Es were fitted with the [[AN/AAS-33]] DRS (Detecting and Ranging Set), part of the 'Target Recognition and Attack Multi-Sensor' (TRAM) system, a small, gyroscopically stabilized turret, mounted under the nose of the aircraft, containing a [[forward-looking infra-red]] (FLIR) boresighted with a [[laser]] spot-tracker/designator and [[IBM]] [[IBM System/4 Pi|AN/ASQ-155]] computer. TRAM was matched with a new Norden AN/APQ-156 radar. The BN could use both TRAM imagery and radar data for extremely accurate attacks, or use the TRAM sensors alone to attack without using the Intruder's radar (which might warn the target). TRAM also allowed the Intruder to autonomously designate and drop [[laser-guided bomb]]s. In addition, the Intruder used an Airborne [[moving target indicator|Moving Target Indicator]] (AMTI), which allowed the aircraft to track a moving target (such as a tank or truck) and drop ordnance on it even though the target was moving. Also, the computer system allowed the use of Offset Aim Point (OAP), giving the crew the ability to drop on a target unseen on radar by noting coordinates of a known target nearby and entering the offset range and bearing to the unseen target.

In the 1980s, the A-6E TRAM aircraft were converted to the A-6E 'Weapons Control System Improvement' (WCSI) version to extend weapons capability. This added the ability to carry and target some of the first generation precision guided weapons, like the [[AGM-84 Harpoon]] missile, and [[AGM-123 Skipper]]. WCSI equipped aircraft were eventually modified to have a limited capability to use the [[AGM-84E SLAM]] standoff land attack missile. Since the Harpoon and SLAM missiles had common communication interfaces, WCSI aircraft could carry and fire SLAM missiles, but needed a nearby A-6E SWIP to guide them to target.

[[File:AN-APQ-148 Radar, Norden, 1972 - National Electronics Museum - DSC00068.JPG|thumb|upright|Norden [[AN/APQ-148]] Radar<ref>{{cite web |url=http://www.designation-systems.net/usmilav/jetds/an-apq.html |title=AN/APQ – Airborne Multipurpose/Special Radars |author=<!--Staff writer(s); no by-line.--> |date=2007-07-01 |website=designation-systems.net|access-date=2015-01-27}}</ref>]]
In the early 1990s, some surviving A-6Es were upgraded under SWIP (Systems/Weapons Improvement Program) to enable them to use the latest precision-guided munitions, including [[AGM-65 Maverick]]s, AGM-84E SLAMs, [[AGM-62 Walleye]]s and the [[AGM-88 HARM]] [[anti-radiation missile]] as well as additional capability with the AGM-84 Harpoon. A co-processor was added to the AN/ASQ-155 computer system to implement the needed MIL-STD-1553 digital interfaces to the pylons, as well as an additional control panel. After a series of wing-fatigue problems, about 85% of the fleet was fitted with new graphite/epoxy/titanium/aluminum composite wings. The new wings proved to be a mixed blessing, as a composite wing is stiffer and transmits more force to the fuselage, accelerating fatigue in the fuselage. In 1990, the decision was made to terminate production of the A-6. Through the 1970s and 1980s, the A-6 had been in low-rate production of four or five new aircraft a year, enough to replace mostly accidental losses. The final production order was for 20 aircraft of the SWIP configuration with composite wings, delivered in 1993.

A-6E models totaled 445 aircraft, about 240 of which were converted from earlier A-6A/B/C models.

===A-6F and A-6G===
[[File:A-6F 1987 DN-SC-88-00704.JPEG|thumb|A-6F prototype in 1987]]

An advanced ''A-6F Intruder II'' was proposed in the mid-1980s that would have replaced the Intruder's elderly [[Pratt & Whitney J52]] [[turbojet]]s with non-afterburning versions of the [[General Electric F404]] [[turbofan]] used in the F/A-18 Hornet, providing substantial improvements in both power and fuel economy. The A-6F would have had totally new [[avionics]], including a Norden [[AN/APQ-173]] [[synthetic aperture radar]] and multi-function cockpit displays – the APQ-173 would have given the Intruder air-to-air capacity with provision for the [[AIM-120 AMRAAM]]. Two additional wing pylons were added, for a total of seven stations.

Although five development aircraft were built, the U.S. Navy ultimately chose not to authorize the A-6F, preferring to concentrate on the [[A-12 Avenger II]]. This left the service in a quandary when the A-12 was canceled in 1991.

Grumman proposed a cheaper alternative in the ''A-6G'', which had most of the A-6F's advanced electronics, but retained the existing engines.<ref>{{citation|title=Pentagon Proposes Buying A-6 Intruders|url=http://www.grummanretireeclub.org/wp-content/themes/grumman-child/archive-newsletters/grumman-world-1988-05-13-Volume-7-Number-9.pdf|access-date=6 October 2017|periodical=Grumman World|volume=7|issue=9|page=1|date=13 May 1988}}</ref> This, too, was canceled.

===Electronic warfare versions===
{{main|Northrop Grumman EA-6B Prowler}}
[[File:Grumman EA-6A 156983 VMCJ-2 America 30.09.74 edited-2.jpg|thumb|right|US Marine Corps EA-6A Intruder electronics aircraft of VMCJ-2 ''Playboys'' aboard USS ''America'' in 1974 during a visit to [[Scotland]].]]

An [[electronic warfare]] (EW)/[[Electronic countermeasures]] (ECW) version of the Intruder was developed early in the aircraft's life for the [[United States Marine Corps|USMC]], which needed a new ECM platform to replace its elderly [[Douglas F3D Skyknight|F3D-2Q Skyknights]]. An EW version of the Intruder, initially designated ''A2F-1H'' (rather than A2F-1Q, as "Q" was being split to relegate it to passive electronic warfare and "H" to active) and subsequently redesignated ''EA-6A'', first flew on 26 April 1963. It had a [[Bunker Ramo Corporation|Bunker-Ramo]] AN/ALQ-86 ECM suite, with most electronics contained on the walnut-shaped pod atop the vertical fin. They were equipped with AN/APQ-129 fire control radar, and theoretically capable of firing the [[AGM-45 Shrike]] [[anti-radiation missile]], although they were apparently not used in that role. The navigational radar is AN/APN-153.

Only 28 EA-6As were built (two prototypes, 15 new-build, and 11 conversions from A-6As), serving with U.S. Marine Corps squadrons in [[Vietnam War|Vietnam]]. It was phased out of front line service in the mid-1970s, remaining in use in reserve VMCJ units with the USMC and then the United States Navy in specialized VAQ units, primarily for training purposes. The last EA-6A had been retired by 1993.

A much more highly specialized derivative of the Intruder was the [[Northrop Grumman EA-6B Prowler|EA-6B Prowler]], having a "stretched" airframe with two additional systems operators, and more comprehensive systems for the electronic warfare and [[SEAD]] roles. A derivative of AN/APQ-156, AN/APS-130 was installed as the main radar for EA-6B. The navigational radar was upgraded to AN/APS-133 from the AN/APN-153 on EA-6A. In total, 170 were produced. The EA-6B took on the duties of the U.S. Air Force [[General Dynamics–Grumman EF-111A Raven|EF-111 Raven]] when the DoD decided to let the U.S. Navy handle all electronic warfare missions. The Prowler has been replaced by the [[Boeing EA-18G Growler|EA-18G Growler]] in the U.S. Navy and was retired from USMC service in 2019.

===Variant list===
;YA2F-1
:Pre-production aircraft, eight built with the first four with rotating jet exhaust pipes, redesignated YA-6A in 1962.<ref name="andrade">Andrade 1979, pp. 37–38.</ref>
;A2F-1
:First production variant with fixed tailpipe, 484 built, redesignated ''A-6A'' in 1962.<ref name="andrade" />
;YA2F-1H
:Prototype electronic warfare variant, one modified from A2F-1, redesignated ''YEA-6A'' in 1962.<ref name="andrade" />
;A2F-1H
:Electronic warfare variant of the A2F-1 redesignated ''EA-6A'' in 1962<ref name="andrade" />
;YA-6A
:Pre-production aircraft redesignated from YA2F-1 in 1962.<ref name="andrade" />
;A-6A
:First production variant redesignated from A2F-1 in 1962.<ref name="andrade" />
;YEA-6A
:One YA2F-1H electronic warfare variant prototype redesignated in 1962.<ref name="andrade" />
;EA-6A
:Electronic warfare variant redesignated from A2F-1H, had a redesigned fin and rudder and addition of an ECM radome, able to carry underwing ECM pods, three YA-6A and four A-6As converted and 21 built.<ref name="andrade" />
;NA-6A
:The redesignation of three YA-6As and three A-6As. The six aircraft were modified for special tests.<ref name="andrade" />
;NEA-6A
:One EA-6A aircraft was modified for special test purposes.<ref name="andrade" />
;TA-6A
:Proposed trainer variant with three-seat, not built.<ref name="andrade" />
;A-6B
:Variant fitted with avionics for the suppression of enemy air defenses (SEAD), 19 conversions from A-6A.<ref name="Andrews"/>
;[[Grumman EA-6B Prowler|EA-6B Prowler]]
:Electronic warfare variant of the A-6A with longer fuselage for four crew.<ref name="andrade" />
;YEA-6B
:The designation of two EA-6B prototypes, which were modified for special test purposes.
;A-6C
:A-6A conversion for low-level attack role with electro-optical sensors, twelve converted.<ref name="andrade" />
;KA-6D
:A-6A conversion for flight-refueling, 58 converted.<ref name="andrade" />
[[File:Grumman A-6E Intruder of VA-52 in flight, in 1981 (6379373).jpg|thumb|A-6E Intruder of VA-52, 1981]]
;A-6E
:A-6A with improved electronics.<ref name="andrade" />
;A-6E TRAM
:A-6E upgraded with the AN/AAS-33 Target Recognition Attack Multi-Sensor or "TRAM" pod. Capable of dropping Laser Guided Bombs without a targeting pod. Can also carry the [[Harpoon (missile)|AGM-84 Harpoon]].<ref name=":0">{{Cite book|last=Morgan|first=Rick|title=Osprey Combat Aircraft 121: A-6 Intruder Units 1974-96|publisher=Osprey Publishing|year=2017|isbn=978-1-4728-1877-5}}</ref>
;A-6E SWIP
:A-6E TRAM upgraded with the [[AN/ALR-67 radar warning receiver|AN/ALR-67 RWR]] and ability to carry the [[AGM-88 HARM]], [[AGM-62 Walleye]], [[AGM-84E Standoff Land Attack Missile|AGM-84E SLAM]] and [[AGM-65 Maverick]]. Several versions had new composite wings.<ref name=":0" />
;A-6F Intruder II
:Advanced version with updated electronics and [[General Electric F404]] turbofans; only 5 built.
;A-6G
:Proposed cheaper alternative to the A-6F, with its advanced electronics, but existing J52 turbojets.
;G-128-12
:Unbuilt single-seat A-6 based design proposal for the VA(L) competition for [[A-4 Skyhawk]] replacement based on existing design. Contract ultimately awarded to the [[LTV A-7 Corsair II]].<ref name="Buttler">Buttler 2010, pp. 147–148.</ref>

==Operators==
{{See also|List of A-6 Intruder operators}}

;{{USA}}
*[[United States Navy]] (1963–1997)
*[[United States Marine Corps]] (1963–1993)

==Aircraft on display==
[[File:Intruder on display.jpg|thumb|A Grumman A-6 Intruder on display at Grumman Memorial Park]]
[[File:20180328 A-6 Intruder Udvar-Hazy 2.jpg|thumb|right|An A-6 Intruder on display at the [[Udvar-Hazy Center]].]]
[[File:A6 USS Intrepid.jpg|thumb|An A-6F Intruder prototype on display at the [[Intrepid Sea-Air-Space Museum]], [[New York City]] ]]
[[File:A-6E Intruder Pax River Museum.jpg|thumb|An A-6E Intruder on display at Patuxent River Naval Air Museum]]
{{For|EA-6A and EA-6B|Northrop Grumman EA-6B Prowler}}

;YA-6A
* 147865 – [[Marine Corps Air Station Cherry Point|Cherry Point]] Historical Aircraft Park, [[Havelock, North Carolina]];<ref>{{Cite web |last=Hicks |first=Martin |date=2022-07-21 |title=Marine Corps Air Station Cherry Point has ribbon cutting on new aircraft park |url=https://wcti12.com/news/local/marine-corps-air-station-cherry-point-has-ribbon-cutting-on-new-aircraft-park |access-date=2024-03-01 |website=WCTI |language=en}}</ref> displayed as an EA-6A. 
* 147867 – Alleghany Arms & Armory Museum, [[Smethport, Pennsylvania]].{{Cn|date=September 2024}}
;KA-6D
* 149482 – [[Naval Air Station Whidbey Island|NAS Whidbey]], [[Oak Harbor, Washington]];<ref>[https://homeportnorthwest.wordpress.com/2019/09/11/a6-intruder-display-new-location/ "A-6 Intruder/149482."] Retrieved: 11 September 2019.</ref> displayed as an A-6E.
* 151826 – [[Battleship Memorial Park]], [[Mobile, Alabama]];<ref>[https://www.jetphotos.com/photo/8358348 "A-6 Intruder/151826"] Retrieved: 9 December 2019.</ref>
* 152910 – [[Oakland Aviation Museum]], [[Oakland, California]].{{Cn|date=September 2024}}
;A-6E
* 151782 – [[USS Midway Museum]], [[San Diego, California]]<ref>[http://www.midway.org/Aircraft-Museum "A-6 Intruder/151782."] {{Webarchive|url=https://web.archive.org/web/20130325094835/http://www.midway.org/Aircraft-Museum |date=25 March 2013 }} ''USS Midway Museum.'' Retrieved: 10 March 2013.</ref>
* 152599 – [[Patriots Point]] Naval & Maritime Museum, [[Mount Pleasant, South Carolina]]<ref>[http://www.patriotspoint.org/pdf/aircraft/a-6e_intruder.pdf "A-6 Intruder/152599."] ''Patriots Point Naval & Maritime Museum.'' Retrieved: 10 March 2013.</ref>
* 152603 – Richmond Municipal Airport, [[Richmond, Indiana]].{{Cn|date=September 2024}}
* 152907 – NAS Whidbey, Oak Harbor, Washington.{{Cn|date=September 2024}}
* 152923 – [[Norfolk Naval Station]]/Chambers Field (former [[NAS Norfolk]]), [[Norfolk, Virginia]].{{Cn|date=September 2024}}
* 152935 – [[Empire State Aerosciences Museum]], [[Glenville, New York]]<ref>[http://www.esam.org/images/A-6E%20Photo1.JPG "A-6 Intruder/152935."] ''Empire State Aerosciences Museum.'' Retrieved: 23 July 2015.</ref>
* 152936 – United States Naval Museum of Armament and Technology, NCC China Lake (North), [[Ridgecrest, California]].{{Cn|date=September 2024}}
* 154131 – Walker Field Colorado Park, [[Grand Junction, Colorado]].{{Cn|date=September 2024}}
* 154162 – [[Palm Springs Air Museum]], [[Palm Springs, California]]<ref>[http://www.palmspringsairmuseum.org/aircrafts.htm "A-6 Intruder/154162."] {{Webarchive|url=https://web.archive.org/web/20120317173342/http://palmspringsairmuseum.org/aircrafts.htm |date=17 March 2012 }} ''Palm Springs Air Museum.'' Retrieved: 10 March 2013.</ref>
* 154167 – [[Steven F. Udvar-Hazy Center]], [[National Air and Space Museum|NASM]], [[Washington, D.C.]]<ref>[http://airandspace.si.edu/collections/artifact.cfm?id=A19940152000 "A-6 Intruder/154167."] ''NASM.'' Retrieved: 10 March 2013.</ref>
* 154170 – [[Flying Leatherneck Aviation Museum]], [[MCAS Miramar]], San Diego, California<ref>[https://www.flyingleathernecks.org/wp-content/uploads/2013/10/Aircraft_Listing.pdf "A-6 Intruder/154170."] {{Webarchive|url=https://web.archive.org/web/20160304030559/http://flyingleathernecks.org/wp-content/uploads/2013/10/Aircraft_Listing.pdf |date=4 March 2016 }} ''Flying Leatherneck Aviation Museum.'' Retrieved: 23 July 2015.</ref>
* 154171 – [[Estrella Warbird Museum]], [[Paso Robles, California]]<ref>[http://www.ewarbirds.org/a6.html "A-6 Intruder/154171."] ''Estrella Warbird Museum.'' Retrieved: 10 March 2013.</ref>
* 155595 – [[Pacific Coast Air Museum]], [[Santa Rosa, California]]<ref>[http://www.pacificcoastairmuseum.org/aircraft/A6EIntruder.asp "A-6 Intruder/155595."] ''Pacific Coast Air Museum.'' Retrieved: 10 March 2013.</ref>
* 155610 – [[National Naval Aviation Museum]], [[NAS Pensacola]], [[Pensacola, Florida]]<ref>[http://www.navalaviationmuseum.org/attractions/aircraft-exhibits/item/?item=a-6e_intruder "A-6 Intruder/155610."] ''National Naval Aviation Museum.'' Retrieved: 23 July 2015.</ref>
* 155627 – [[NAS Fallon]], [[Fallon, Nevada]].{{Cn|date=September 2024}}
* 155629 – [[Hickory Aviation Museum]], Hickory NC<ref>[http://www.hickoryaviationmuseum.org/flight-line.html Flight Line]. hickoryaviationmuseum.org.</ref>
* 155644 – [[Yanks Air Museum]], [[Chino, California]]<ref>[https://yanksair.com/Products/63/111/Grumman-G-128-Intruder-A-6E-2/ "A-6 Intruder/155644."] {{webarchive|url=https://web.archive.org/web/20140106034329/https://yanksair.com/Products/63/111/Grumman-G-128-Intruder-A-6E-2/ |date=6 January 2014}} ''Yanks Air Museum''. Retrieved: 10 March 2013.</ref>
* 155648 – [[Aviation History & Technology Center]], [[Dobbins ARB]] (formerly Atlanta NAS), [[Atlanta, Georgia]].{{Cn|date=September 2024}}
* 155661 – [[Camp Blanding]] Museum and Memorial Park, [[Camp Blanding, Florida]].{{Cn|date=September 2024}}
* 155713 – [[Pima Air & Space Museum]] (adjacent to [[Davis-Monthan AFB]]), [[Tucson, Arizona]]<ref>[http://www.pimaair.org/aircraft-by-name/item/grumman-a-6e-intruder "A-6 Intruder/155713."] ''Pima Air & Space Museum.'' Retrieved: 23 July 2015.</ref>
* 156997 – [[Patuxent River Naval Air Museum]], [[NAS Patuxent River]], [[Lexington Park, Maryland]].{{Cn|date=September 2024}}
* 157001 – Naval Inventory Control Point, [[Philadelphia, Pennsylvania]].{{Cn|date=September 2024}}
* 157024 – Defense General Supply Center, [[Richmond, Virginia]].{{Cn|date=September 2024}}
* 158532 – [[USS Lexington (CV-16)#USS Lexington Museum|USS ''Lexington'' Museum]], [[Corpus Christi, Texas]]<ref>[http://usslexington.com/aircraft/a-6e-intruder/ "A-6 Intruder/158532."] ''USS Lexington Museum.'' Retrieved: 10 March 2013.</ref>
* 158794 – [[Museum of Flight]], [[Seattle, Washington]]<ref>[http://www.museumofflight.org/aircraft/grumman-6e-intruder "A-6 Intruder/158794."] ''Museum of Flight.'' Retrieved: 10 March 2013.</ref>
* 159567 – Naval Surface Warfare Center Dahlgren Division, [[Dahlgren, Virginia]].{{Cn|date=September 2024}}
* 159568 – [[Patuxent River NAS]], [[Lexington Park, Maryland]].{{Cn|date=September 2024}}
* 159579 – [[Castle Air Museum]], Atwater, California<ref>{{cite web |title=Our Collection |url=http://www.castleairmuseum.org/collection |website=Castle Air Museum |access-date=14 November 2023}}</ref>{{Failed verification|date=November 2023}}
* 159901 – [[NAF El Centro]], [[El Centro, California]].{{Cn|date=September 2024}}
* 160995 – [[Yanks Air Museum]], [[Chino, California]]<ref>[https://yanksair.com/Products/62/111/Grumman-G-128-Intruder-A-6E/ "A-6 Intruder/160995."] {{webarchive|url=https://web.archive.org/web/20140106034326/https://yanksair.com/Products/62/111/Grumman-G-128-Intruder-A-6E/ |date=6 January 2014}} ''Yanks Air Museum''. Retrieved: 10 March 2013.</ref>
* 161676 – Lycoming County Veterans Memorial Park, [[Williamsport, Pennsylvania]].{{Cn|date=September 2024}}
* 162182 – [[Valiant Air Command Warbird Museum]], [[Space Coast Regional Airport]], [[Titusville, Florida]]<ref>[http://www.vacwarbirds.net/warbird-museum/vac-aircraft-inventory/ "A-6 Intruder/162182."] {{Webarchive|url=https://web.archive.org/web/20150729082314/http://www.vacwarbirds.net/warbird-museum/vac-aircraft-inventory/ |date=29 July 2015 }} ''Valiant Air Command Museum''. Retrieved: 23 July 2015.</ref>
* 162195 – [[San Diego Aerospace Museum]], San Diego, California.{{Cn|date=September 2024}}
* 162206 – [[Oregon Air and Space Museum]], [[Eugene, Oregon]]<ref>[https://web.archive.org/web/20090420053843/http://www.oasm.info/featured_aircrafts.php "A-6 Intruder/162206."] ''Oregon Air and Space Museum.'' Retrieved: 10 March 2013.</ref>
* 164378 – Eastern Carolina Aviation Exhibit, [[Havelock, North Carolina]].{{Cn|date=September 2024}}
* 164384 – Grumman Memorial Park, [[Long Island, New York]].
;A-6F
* 162184 – [[Cradle of Aviation Museum]], [[Garden City, New York]]<ref>[http://www.cradleofaviation.org/history/permanent_exhibits/jet_gallery/grumman_a6-f_intruder.html "A-6 Intruder II/162184."] {{webarchive|url=https://web.archive.org/web/20150907231241/http://www.cradleofaviation.org/history/permanent_exhibits/jet_gallery/grumman_a6-f_intruder.html |date=7 September 2015}} ''Cradle of Aviation Museum''. Retrieved: 23 July 2015.</ref>
* 162185 – [[Intrepid Sea-Air-Space Museum]], [[New York City]], New York<ref>[http://www.intrepidmuseum.org/AircraftCollection.aspx "A-6 Intruder II/162185."] {{Webarchive|url=https://web.archive.org/web/20151219014823/http://www.intrepidmuseum.org/AircraftCollection.aspx |date=19 December 2015 }} ''Intrepid Sea-Air-Space Museum.'' Retrieved: 23 July 2015.</ref>

==Specifications (A-6E)==
[[File:Grumman A-6E Intruder 3-view line drawing.png|frameless|right|3-view line drawing of the Grumman A-6E Intruder]]
[[File:Grumman A-6A Intruder weapon load display, 1962 (NNAM.2011.003.240.028).jpg|thumb|A-6 ordnance, 1962]]

{{Aircraft specs
|ref= ''Jane's All The World's Aircraft 1982–83''<ref name="jawa82 p377-8">Taylor 1982, pp. 377–378.</ref> ''Jet Bombers: From the Messerschmitt Me 262 to the Stealth B-2''<ref name = "bomber 213">Gunston and Gilchrist 1993, p. 213.</ref>
|prime units?= kts
<!--   General characteristics
-->
|genhide=

|crew= 2 (pilot, bombardier/navigator)
|capacity=
|length m=
|length ft= 54
|length in= 9
|span m=
|span ft= 53
|span in= 0
|width m=
|width ft= 25
|width in= 2
|width note= wing folded
|swept m=<!-- swing-wings -->
|swept ft=<!-- swing-wings -->
|swept in=<!-- swing-wings -->
|height m=
|height ft= 16
|height in= 2
|wing area sqm=
|wing area sqft= 528.9
|wing area note=
|swept area sqm=<!-- swing-wings -->
|swept area sqft=<!-- swing-wings -->
|aspect ratio= 5.31:1<ref name="quest">Loftin, LK, Jr. [http://www.hq.nasa.gov/pao/History/SP-468/cover.htm ''Quest for Performance: The Evolution of Modern Aircraft. NASA SP-468''.] {{Webarchive|url=https://web.archive.org/web/20060613210139/http://www.hq.nasa.gov/pao/History/SP-468/cover.htm |date=13 June 2006 }} ''nasa.gov''. Retrieved: 22 April 2006.</ref>
|airfoil=
|empty weight kg=
|empty weight lb= 26660
|empty weight note=
|gross weight kg=
|gross weight lb=
|gross weight note=
|max takeoff weight lb= 60400
|max takeoff weight note= (shore-based operations)
|fuel capacity= {{convert|2385|USgal|impgal L|abbr=on}} (internal fuel)
|more general=* '''[[Zero-lift drag coefficient]]:''' 0.0144<ref name="quest"/>
<!--   Powerplant
-->
|eng1 number= 2
|eng1 name= [[Pratt & Whitney J52]]-P8B
|eng1 type= [[turbojet]]s
|eng1 kn=<!-- jet/rocket engines -->
|eng1 lbf= 9300<!-- jet/rocket engines -->
|power original=
|thrust original=
<!--   Performance
-->
|perfhide=
|max speed kmh=
|max speed mph=
|max speed kts= 560
|max speed note= at sea level
|max speed mach=<!-- supersonic aircraft -->
|cruise speed kmh=<!-- if max speed unknown -->
|cruise speed mph=<!-- if max speed unknown -->
|cruise speed kts= 412
|never exceed speed kmh=
|never exceed speed mph=
|never exceed speed kts= 700
|stall speed kts= 98
|stall speed note= (flaps down)
|range km=
|range miles=
|range nmi=
|combat range km=
|combat range miles=
|combat range nmi= 878
| combat range note= (with max payload)
|ferry range nmi= 2818
|endurance=<!-- if range unknown -->
|ceiling m=
|ceiling ft= 42400
|g limits= -2.4 to 6.5
|roll rate=<!-- aerobatic -->
|climb rate ms=
|climb rate ftmin= 7620
|lift to drag= 15.2<ref name="quest"/>
|wing loading kg/m2=
|wing loading lb/sqft=
|wing loading note=
|more performance=* '''Take-off run to 50 ft (15 m):''' {{convert|4530|ft|m|abbr=on}}
* '''Landing run from 50 ft (15 m):''' {{convert|2540|ft|m|abbr=on}}
<!--   Armament
-->
|guns= 
|bombs= 
|rockets= 
|missiles= 
|hardpoints= Five hardpoints
|hardpoint capacity= {{convert|3600|lb|kg|abbr=on}} each (4 under wings, 1 under fuselage), {{convert|18000|lb|kg|abbr=on}} total
|hardpoint rockets=<br />
*** 12× LAU-10 4-round 5 inch (127 mm) [[Zuni (rocket)|Zuni]] pods
*** 12× LAU-68 7-round 2.75 inch (70 mm) [[Folding-Fin Aerial Rocket|FFAR]] pods
*** 12× LAU-61/LAU-68 19-round 2.75 inch (70 mm) FFAR pods
|hardpoint missiles=<br />
*** [[AGM-45 Shrike]] anti-radar missile<ref name="sacA-6E">{{cite web |title=NAVAIR 00-110AA6-5: Standard Aircraft Characteristics: A-6E (TRAM) Intruder |date=November 1979 |publisher=US Navy |url=http://www.alternatewars.com/SAC/A-6E_Intruder_(TRAM)_SAC_-_November_1979.pdf |access-date=12 January 2019 |via=alternatewars.com}}</ref> × 2
*** [[AGM-78 Standard ARM]] [[anti-radar missile]]<ref name="wapj12 p44">Dorr ''World Air Power Journal'' Spring 1983, p. 44.</ref> × 2
*** [[AGM-62 Walleye]] TV-guided [[glide bomb]]<ref name="wapj12 p56">Dorr ''World Air Power Journal'' Spring 1983, p. 56.</ref>
*** [[AGM-65 Maverick]] [[air-to-ground missile]]<ref name="wapj12 p56"/> × 6
*** [[Harpoon (missile)|AGM-84 Harpoon]] [[anti-ship missile]]<ref name="wapj12 p56"/>/[[AGM-84E Standoff Land Attack Missile]]<ref name="wapj12 p57">Dorr ''World Air Power Journal'' Spring 1983, p. 57.</ref> × 4
*** [[AGM-88 HARM]] anti-radar missile
*** [[AGM-123 Skipper]] air-to-ground missile
*** [[AIM-9 Sidewinder]] air-to-air missile<ref name="AI1186 p229">Dorr ''Air International'' November 1986, p. 229.</ref>
*** [[ADM-141 TALD]] decoy missiles<ref name="wapj12 p60">Dorr ''World Air Power Journal'' Spring 1983, p. 60.</ref>
|hardpoint bombs=<br />
*** 28× [[Mark 82 bomb|Mk 82]] 500 lb (227 kg) GP bombs or [[CBU-100 Cluster Bomb|Mk 20 Rockeye II]] [[cluster bomb]]<ref name="sacA-6E"/><ref group=note>Which technically capable of carrying 30 bombs, the rear inboard position of the Multiple Ejector Racks on hardpoints 2 and 4 (internal wing) had to be left clear to allow the landing gear to retract freely.</ref>
*** 13× [[Mark 83 bomb|Mk 83]] 1,000 lb (454 kg) GP bombs<ref name="sacA-6E"/>
*** 5× [[Mark 84 bomb|Mk 84]] 2,000 lb (907 kg) GP bombs<ref name="sacA-6E"/>
*** 5× [[GBU-12]]/[[GBU-16|16]]/[[GBU-10|10]] laser-guided bombs
*** 5× [[CBU-72]] Fuel-Air Explosives<ref name="sacA-6E"/>
*** Up to three [[B43 nuclear bomb|B43]], [[B57 nuclear bomb|B57]] or [[B61 nuclear bomb|B61]] nuclear weapons<ref name="sacA-6E"/>
|hardpoint other=<br />
*** [[Captor mine|Mk 60 Captor Mine]]
*** Up to 5× {{convert|300|USgal|impgal L|abbr=on}} drop tanks
*** Various practice stores, chaff launchers, baggage pods, flares<ref name="sacA-6E"/>
|avionics=
}}

==Notable appearances in media==
<!-- All content about the aircraft in fictional and gaming use has been moved to [[Aircraft in fiction, please see [[WP:AIRPOP]] -->
{{main|Aircraft in fiction#A-6 Intruder}}

==See also==
{{aircontent
|see also=
|related=
*[[Northrop Grumman EA-6B Prowler]]
|similar aircraft=
*[[Blackburn Buccaneer]]
*[[Dassault-Breguet Super Étendard]]
*[[Sukhoi Su-17]]
|lists=
* [[List of accidents and incidents involving the Grumman A-6 Intruder]]
* [[List of attack aircraft]]
* [[List of military aircraft of the United States]]
* [[List of United States military aerial refueling aircraft]]
* [[List of military electronics of the United States]]
}}

==References==

===Notes===
{{reflist|group=note}}

===Citations===
{{Reflist}}

===Bibliography===
{{Refbegin}}
* Andrade, John. ''U.S. Military Aircraft Designations and Serials since 1909''. Leicester, UK: Midland Counties Publications, 1979, {{ISBN|0-904597-22-9}}.
* Buttler, Tony (2010). American Secret Projects: Bombers, Attack and Anti-Submarine Aircraft 1945 to 1974. Hinckley, England: Midland Publishing. {{ISBN|978-1-85780-331-0}}
* Donald, David and Jon Lake. ''Encyclopedia of World Military Aircraft''. London: Aerospace Publishing, Single Volume edition, 1996. {{ISBN|1-874023-95-6}}.
* Dorr, Robert F. ''Grumman A-6 Intruder''. London: Osprey Publishing, 1987. {{ISBN|0-85045-816-1}}.
* Dorr, Robert F. "Grumman A-6 Intruder& EA-6 Prowler". ''World Air Power Journal'', Spring 1983, Volume 12. pp.&nbsp;34–95. {{ISBN|1-874023-18-2}}. {{ISSN|0959-7050}}.
* Dorr, Robert F. "Intruders and Prowlers". ''[[Air International]]'', November 1986, Vol. 31, No. 5. pp.&nbsp;227–236, 250–252. {{ISSN|0306-5634}}.
* Gunston, Bill and Mike Spick. ''Modern Air Combat''. New York: Crescent Books, 1983. {{ISBN|0-517-41265-9}}.
* Gunston, Bill and Peter Gilchrist. ''Jet Bombers: From the Messerschmitt Me 262 to the Stealth B-2''. Osprey, 1993. {{ISBN|1-85532-258-7}}.
* Hildebrandt, Erik. 1996–1997. "Burial at Sea: Navy's A-6 Intruder is Retiring, and What Could be a More Fitting End?" Air and Space Smithsonian. December 1996 – January 1997, Volume 11 (5). Pages 64–70. Also: [http://www.geocities.ws/Pentagon/Bunker/7316/burial.html "Burial at Sea."]
* Hobson, Chris. ''Vietnam Air Losses, USAF/USN/USMC, Fixed-Wing Aircraft Losses in Southeast Asia, 1961–1973''. North Branch, Minnesota: Specialty Press, 2001. {{ISBN|1-85780-115-6}}.
* Jenkins, Dennis R. ''Grumman A-6 Intruder''. Warbird Tech. '''33'''. North Branch, Minnesota: Specialty Press, 2002. {{ISBN|1-58007-050-7}}.
* Miska, Kurt H. "Grumman A-6A/E Intruder; EA-6A; EA-6B Prowler (Aircraft in Profile number 252)". ''Aircraft in Profile, Volume 14''. Windsor, Berkshire, UK: Profile Publications Ltd., 1974, pp.&nbsp;137–160. {{ISBN|0-85383-023-1}}.
* Morgan, Mark and Rick Morgan. ''Intruder: The Operational History of Grumman's A-6''. Atglen, Pennsylvania: Schiffer Publishing, Ltd., 2004. {{ISBN|0-7643-2100-5}}.
* Morgan, Rick. ''A-6 Intruder Units of the Vietnam War (Osprey Combat Aircraft #93)''. Oxford, UK: Osprey Publishing Limited, 2012. {{ISBN|978-1-84908-755-1}}.
*Reardon, Carol. ''Launch the Intruders''. University of Kansas Press, 2005. {{ISBN| 978-0-7006-1677-0}}.
* Taylor, John W.R. "Grumman A-6 Intruder". ''Combat Aircraft of the World from 1909 to the Present''. New York: G.P. Putnam's Sons, 1969. {{ISBN|0-425-03633-2}}.
* [[John W. R. Taylor|Taylor, John W. R.]] ''Jane's All The World's Aircraft 1982–83''. London: Jane's Yearbooks, 1982. {{ISBN|0-7106-0748-2}}.
* Winchester, Jim, ed. "Grumman A-6 Intruder". ''Military Aircraft of the Cold War'' (The Aviation Factfile). London: Grange Books plc, 2006. {{ISBN|1-84013-929-3}}.
{{Refend}}

==External links==
{{commons category|Grumman A-6 Intruder}}
* [https://www.history.navy.mil/research/histories/naval-aviation-history/naval-aircraft/attack-aircraft/a-6e-intruder.html A-6E Intruder]
* [http://www.intruderassociation.org/ Intruder Association]
* [http://www.globalsecurity.org/military/systems/aircraft/a-6.htm A-6 page on globalsecurity.org]
* Joe Baugher's website on the [http://www.joebaugher.com/usattack/newa6.html Grumman A-6 Intruder]

{{Grumman aircraft}}
{{US attack aircraft}}
{{USN attack aircraft}}
{{Authority control}}

[[Category:Grumman aircraft|A-006]]
[[Category:1960s United States attack aircraft]]
[[Category:Twinjets]]
[[Category:Carrier-based aircraft]]
[[Category:Mid-wing aircraft]]
[[Category:Aircraft first flown in 1960]]