Air Test and Evaluation Squadron 4

VX-4, formally Air Test and Evaluation Squadron Four and commonly known as The Evaluators, was a United States Navy aviation unit headquartered at Naval Air Station Point Mugu, California. Its principal mission was to conduct operational test and evaluation of air-launched guided missiles and, increasingly, the aircraft, sensors, electronic-warfare equipment, navigation systems, and tactics used with them. The squadron operated aircraft representative of the Navy fleet so that new weapons and systems could be assessed in realistic service conditions before, or during, their introduction into operational units. The VX-4 designation has been used by two separate Navy squadrons. The first was created in 1946 at Naval Air Station Quonset Point as Experimental and Development Squadron Four. Equipped with PB-1W aircraft, it worked on airborne early-warning equipment and procedures. It moved to Naval Air Station Atlantic City in 1950 and then to Naval Air Station Patuxent River in 1951, where it was disestablished later that year after its assigned projects lapsed. The second and better-known VX-4 was established at Naval Air Station Point Mugu in 1952 and is the subject of the VX-4 historical record. The Point Mugu squadron initially concentrated on operational evaluation of air-launched guided missiles under the direction of the Navy's operational test authorities. Its aircraft evolved with the Navy's fighter inventory and the weapons under assessment. The unit began with the Chance Vought F7U Cutlass and later operated aircraft including the Douglas F3D Skyknight, North American FJ Fury, Douglas A-4 Skyhawk, McDonnell F3H Demon, Vought F-8 Crusader, McDonnell Douglas F-4 Phantom II, Grumman F-14 Tomcat, and McDonnell Douglas F/A-18 Hornet. Its tail code was XF. During the 1960s, VX-4 broadened its work beyond guided missiles alone. Its projects included operational testing of terrain-clearance radar, Doppler navigation systems, and air-to-air distance-measuring equipment. The squadron evaluated major fighter weapons and survivability systems, including the AIM-7 Sparrow, AIM-9 Sidewinder, and AIM-54 Phoenix missiles, radar-warning equipment, and self-protection jammers. It also developed and disseminated tactics intended to help fleet crews employ these systems effectively. The early 1990s were a particularly active period. The F-4 Phantom left VX-4 service in January 1990 after almost three decades with the squadron, while the F-14D Super Tomcat arrived later that year. VX-4 oversaw early operational testing of the F-14D and T-45 Goshawk, developed tactics for the ALR-67 radar-warning receiver, and began work on the AIM-120 AMRAAM. Following Iraq's invasion of Kuwait and the Gulf War, the squadron helped identify deficiencies in fighter weapons systems, evaluate corrective measures, and communicate updated information to deployed fleet units through messages and briefings from aircrews operating in Southwest Asia. VX-4 continued AMRAAM, F-14D, electronic-warfare, infrared search-and-track, and missile evaluations after the Gulf War. Its F/A-18 projects included testing the ALR-67 ECP-510 configuration and the Swedish BOL chaff dispenser on the F-14. In the early 1990s, the Navy began consolidating its operational test and evaluation organizations. F/A-18 projects and aircraft were progressively transferred from VX-4 to VX-5 at Naval Air Weapons Station China Lake, and the remaining VX-4 assets were ultimately reassigned to VX-9 Detachment Point Mugu. VX-4 was disestablished on September 30, 1994.

The VX-4 designation belongs to two different United States Navy aviation organizations. The first was created in 1946 at Naval Air Station Quonset Point as Experimental and Development Squadron Four. Flying PB-1W aircraft, it concentrated on airborne early-warning equipment and operating procedures. It relocated to Naval Air Station Atlantic City in 1950 and to Naval Air Station Patuxent River in 1951. The organization was disestablished later in 1951 after the projects assigned to it came to an end. The second VX-4 was established at Naval Air Station Point Mugu in 1952. This squadron conducted operational test and evaluation of air-launched guided missiles assigned by the Navy's operational test authorities. Its role was not limited to laboratory assessment: VX-4 flew aircraft in configurations representative of those used by fleet units, evaluated systems under operational conditions, and translated test results into tactics and recommendations for naval aviation. The squadron's aircraft changed as Navy fighter technology developed. Early platforms included the Chance Vought F7U Cutlass and the McDonnell Douglas F3D Skyknight, later redesignated the F-10. The introduction of the AIM-7 Sparrow led to the use of aircraft such as the North American FJ Fury, Douglas A-4 Skyhawk, and McDonnell F3H Demon. With the AIM-9 Sidewinder, the Vought F-8 Crusader became part of the unit's fleet. The McDonnell Douglas F-4 Phantom II arrived in the early 1960s, followed by the Grumman F-14 Tomcat in the early 1970s and the McDonnell Douglas F/A-18 Hornet as that aircraft entered Navy service. In the 1960s, VX-4 expanded its portfolio beyond missile evaluation. It worked on operational testing of terrain-clearance radar, Doppler navigation, and air-to-air distance-measuring equipment. Its weapons and survivability work included the AIM-7 Sparrow, AIM-9 Sidewinder, AIM-54 Phoenix, radar-warning receivers, and self-protection jammers. The squadron's output included both technical assessments and practical employment tactics intended for fleet aircrews. The 1990s brought major changes in both technology and organizational structure. In January 1990, VX-4 ended nearly thirty years of F-4 Phantom operations. The F-14D Super Tomcat arrived a few months later, and the squadron supervised early operational testing of both the F-14D and the T-45 Goshawk during the same year. VX-4 also developed tactics for the ALR-67 radar-warning receiver and began developing employment tactics for the AIM-120 AMRAAM. The Iraqi invasion of Kuwait in August 1990 and the ensuing Gulf War increased the operational importance of the squadron's work. During Desert Shield, Desert Storm, and later Southwest Asia operations, VX-4 helped discover deficiencies in fighter weapons systems, evaluate and field fixes, and provide current information to deployed forces. Aircrews deployed aboard carriers in the Red Sea and northern Arabian Sea delivered information through fleet messages and briefings after combat began in January 1991. After the war, the squadron resumed a broader test program. AMRAAM evaluation on the F/A-18 continued through 1991 and was completed in early 1994. Other work included F-14D evaluation, the Swedish BOL chaff dispenser, Sidewinder, Sparrow, and Phoenix missile assessments, infrared search-and-track testing, and ALR-67 ECP-510 testing on the F/A-18 during 1991 and 1992. By late 1993, Hornet testing was winding down at VX-4. The Navy began transferring F/A-18 projects and aircraft to VX-5 at Naval Air Weapons Station China Lake as part of a consolidation plan. The first Hornet left before the end of 1993, and the remaining aircraft followed in early 1994. VX-4 was formally disestablished on September 30, 1994. Its assets were reassigned to VX-9 Detachment Point Mugu, ending the independent existence of The Evaluators.

• 1994

  VX-4 disestablished

  [1]VX-4en.wikipedia.org

  The squadron was disestablished on September 30, with its assets reassigned to VX-9 Detachment Point Mugu.

• 1993

  Hornet projects begin transfer to VX-5

  [1]VX-4en.wikipedia.org

  F/A-18 projects and aircraft began moving to VX-5 at China Lake as part of the planned consolidation of test organizations.

• 1991

  Gulf War support and AMRAAM evaluation

  [1]VX-4en.wikipedia.org

  The squadron supported deployed forces during the Gulf War period and continued F/A-18-based AMRAAM evaluation.

• 1990

  F-4 operations end and F-14D testing begins

  [1]VX-4en.wikipedia.org

  VX-4 ended F-4 Phantom operations, received the F-14D Super Tomcat, and supervised initial operational testing of the F-14D and T-45 Goshawk.

• 1970

  F-14 Tomcat enters the squadron's aircraft inventory

  [1]VX-4en.wikipedia.org

  The F-14 Tomcat joined the aircraft types used by VX-4 for fighter weapons and systems evaluation.

• 1960

  Mission expands beyond guided missiles

  [1]VX-4en.wikipedia.org

  VX-4 added projects involving terrain-clearance radar, Doppler navigation, and air-to-air distance-measuring equipment.

• 1952

  Point Mugu VX-4 established

  [1]VX-4en.wikipedia.org

  The second organization to use the designation was established at Naval Air Station Point Mugu to evaluate air-launched guided missiles.

• 1951

  First VX-4 disestablished

  [1]VX-4en.wikipedia.org

  The original VX-4 moved to Patuxent River and was disestablished later that year after its assigned projects lapsed.

• 1950

  First VX-4 moves to Atlantic City

  [1]VX-4en.wikipedia.org

  The first VX-4 relocated from Quonset Point to Naval Air Station Atlantic City.

• 1946

  First VX-4 established

  [1]VX-4en.wikipedia.org

  An earlier squadron using the VX-4 designation was established at Naval Air Station Quonset Point for airborne early-warning experimentation and development.

A specialized United States Navy operational test and evaluation squadron linking developmental weapons and aircraft systems with practical fleet employment.

• Air-to-air missile

  AIM-7 Sparrow

  VX-4 evaluated the AIM-7 Sparrow and the aircraft, radar, and tactics required for its fleet employment. Sparrow-related testing was part of the squadron's long-running role in assessing air-launched guided weapons.

• Air-to-air missile

  AIM-9 Sidewinder

  The squadron conducted Sidewinder evaluations and related fighter integration work. The missile's introduction also influenced the aircraft types operated by VX-4, including the F-8 Crusader.

• Air-to-air missile

  AIM-54 Phoenix

  VX-4 assessed the Phoenix missile as part of its F-14 Tomcat weapons-evaluation portfolio, contributing to understanding of the weapon's operational employment and associated system performance.

• Air-to-air missile · 1991

  AIM-120 AMRAAM

  VX-4 developed tactics for AMRAAM employment and conducted F/A-18 testing beginning in 1991. The evaluation program continued until its completion in early 1994, shortly before the squadron was disestablished.

• Electronic-warfare system

  ALR-67 radar-warning receiver

  VX-4 developed operational tactics for the ALR-67 radar-warning receiver and supported its incorporation into the F-14. Later work included testing the ECP-510 configuration on the F/A-18.

• Fighter aircraft · 1990

  F-14D Super Tomcat

  The F-14D arrived at VX-4 in 1990. The squadron supervised the aircraft's early operational test activity and evaluated associated sensors, missiles, infrared search-and-track equipment, and defensive systems.

• Fighter aircraft

  F/A-18 Hornet

  VX-4 operated F/A-18 aircraft for weapons, electronic-warfare, and missile testing. Its Hornet portfolio included AMRAAM evaluation and ALR-67 ECP-510 testing before the aircraft and projects were transferred to VX-5.

• 1991Desert Storm operational support

  Red Sea · Northern Arabian Sea · Southwest Asia

  During and after the beginning of Desert Storm, VX-4 aircrews deployed aboard carriers and communicated current information on fighter weapons systems through messages and briefings.

  Outcome. VX-4 contributed to the identification of operational shortcomings and the fielding of fixes during active combat operations.

  Source
• 1990Desert Shield support

  Southwest Asia · United States Navy carrier aviation

  VX-4 supported the operational preparation of Navy fighter weapons systems during the buildup following Iraq's invasion of Kuwait. Its work included identifying deficiencies and assessing corrective measures.

  Outcome. The squadron helped provide updated technical and tactical information for forces preparing for combat operations.

  Source

• 1994

  Disestablishment and reassignment of VX-4 assetsM&A

  Background

  Following the transfer of Hornet work and the broader consolidation of Navy test organizations, the independent VX-4 structure was ended.

  Action taken

  VX-4 was formally disestablished on September 30, 1994, and its assets were reassigned to VX-9 Detachment Point Mugu.

  Aftermath

  The VX-4 identity ceased to operate as an independent squadron, while its Point Mugu capabilities continued under the successor detachment.

  Source

• 1993

  Transfer of F/A-18 projects to VX-5Strategy

  Background

  The Navy began consolidating operational test and evaluation activities, and VX-4's Hornet work was scheduled to move to VX-5 at China Lake.

  Action taken

  The first F/A-18 aircraft departed before the end of 1993, with the remainder and associated projects transferred in early 1994.

  Aftermath

  The transfer formed part of the process that preceded VX-4's disestablishment and the reassignment of its remaining assets.

  Source

• 1994

  VX-4 disestablished and assets reassigned[1]VX-4en.wikipedia.org

  Leadership change

  VX-4 was disestablished on September 30, 1994, with its assets reassigned to VX-9 Detachment Point Mugu.

• 1993

  F/A-18 projects transferred as VX-4 consolidation begins[1]VX-4en.wikipedia.org

  Other

  As the Navy prepared to consolidate operational test organizations, F/A-18 projects and aircraft began moving from VX-4 to VX-5 at China Lake.

• 1991

  VX-4 supports fighter-system evaluation during the Gulf War period[1]VX-4en.wikipedia.org

  Other

  During Desert Shield, Desert Storm, and subsequent Southwest Asia operations, VX-4 helped identify fighter-weapons deficiencies, test fixes, and communicate updated operational information to deployed fleet units.

• 1990

  VX-4 begins testing of the F-14D Super Tomcat and T-45 Goshawk[1]VX-4en.wikipedia.org

  Product generation · Product launch

  The squadron supervised initial operational testing of the F-14D and T-45 Goshawk while also developing tactics for the ALR-67 radar-warning receiver and the emerging AIM-120 AMRAAM.

1. 1VX-4en.wikipedia.org