Ingalls Shipbuilding

Ingalls Shipbuilding is a major American naval shipyard based on the Pascagoula River in Pascagoula, Mississippi. It is a division of Huntington Ingalls Industries (HII), the United States' largest military shipbuilding company, and is principally associated with the construction of large surface combatants, amphibious warfare ships, and high-endurance cutters. The facility occupies a strategically important Gulf Coast location where the river reaches the Gulf of Mexico and has long combined ship design, fabrication, assembly, outfitting, launch, testing, and overhaul capabilities. The enterprise was established in 1938 by Robert Ingersoll Ingalls Sr., initially as a commercial shipbuilder. Its early output included merchant vessels and other commercial craft; one notable wartime vessel was USS George Clymer, which participated in Liberty Fleet Day in September 1941. During the Second World War, the yard became part of the broader American industrial mobilization effort. Its business later shifted increasingly toward government and naval work. In 1957, Ingalls won a contract to build twelve nuclear-powered attack submarines, marking an important transition from commercial shipbuilding into technologically demanding defense production. Litton Industries acquired Ingalls in 1961 and expanded the operation across the Pascagoula River in 1968. The yard reached a reported employment peak of 27,280 workers in 1977, illustrating its importance to the regional economy. Under successive corporate owners, Ingalls developed a substantial portfolio of destroyers, cruisers, amphibious ships, cutters, and other government vessels. The shipyard has also built or refitted ships for foreign customers, including customers in Egypt, Israel, and Venezuela, although its principal market has remained the United States government. The facility sustained substantial physical damage during Hurricane Katrina on August 29, 2005. Shipbuilding was temporarily interrupted after buildings and infrastructure were damaged, but most ships in dock avoided serious harm. Many of the large overhead cranes and other industrial assets remained in service and continue to support production. In April 2001, Litton had been acquired by Northrop Grumman; a decade later, on March 31, 2011, Northrop Grumman separated its shipbuilding businesses into Huntington Ingalls Industries, which became Ingalls Shipbuilding's parent company. In the 2010s and afterward, Ingalls remained closely involved in major U.S. Navy and U.S. Coast Guard programs. Its work included Arleigh Burke-class destroyers, San Antonio-class amphibious transport docks, America-class amphibious assault ships, and Legend-class National Security Cutters. The yard received contracts for additional destroyers, cutters, landing craft, and large-deck amphibious assault ships during this period. These programs position Ingalls as a critical supplier for fleet modernization, amphibious operations, maritime security, and national defense. The business has also had a more varied industrial history: it explored diesel-electric locomotive production in the 1940s, produced a limited locomotive design, and manufactured approximately 4,000 covered hopper railroad cars during the early 1980s. Today, its identity is overwhelmingly that of a large U.S. naval shipbuilder and an important Mississippi employer.

Ingalls Shipbuilding began in 1938 when Robert Ingersoll Ingalls Sr. established a shipbuilding business on the east bank of the Pascagoula River in Mississippi. The site was well suited to maritime production because it connected directly with the Gulf of Mexico. The company first pursued commercial shipbuilding and produced merchant and other civilian vessels. During the early years of the Second World War, its output became part of the national maritime mobilization effort. USS George Clymer, built by Ingalls, was among the vessels associated with the wartime period and participated in Liberty Fleet Day on September 27, 1941. The company gradually moved toward naval construction. A decisive turning point came in 1957, when Ingalls won a contract to build twelve nuclear-powered attack submarines. That award required the yard to develop capabilities in precision fabrication, nuclear-related industrial standards, complex systems integration, and large-scale government program management. It helped establish the shipyard as a long-term U.S. defense supplier rather than solely a commercial vessel producer. Litton Industries acquired Ingalls in 1961. In 1968, Litton expanded the shipbuilding complex to the opposite side of the Pascagoula River, increasing the site's production footprint. The yard became a major regional employer and reached an employment high of 27,280 workers in 1977. Over subsequent decades, its defense portfolio included destroyers, cruisers, amphibious vessels, cutters, and other military ships. Ingalls also undertook international naval work, with ships and naval projects connected with customers in Egypt, Israel, and Venezuela. The shipyard's industrial history was not limited to naval vessels. In the 1940s, Ingalls explored diesel-electric locomotive manufacturing and produced one known example of its Model 4-S design for the Gulf, Mobile & Ohio Railroad. During the early 1980s, it also manufactured roughly 4,000 covered hopper railroad cars, principally for the leasing market through North American Car. These activities were secondary to shipbuilding and did not define the company's long-term identity. In April 2001, Litton Industries was acquired by Northrop Grumman. Ingalls subsequently operated within Northrop Grumman's shipbuilding structure until March 31, 2011, when Northrop Grumman separated its shipbuilding businesses into Huntington Ingalls Industries. Ingalls Shipbuilding became one of HII's principal operating divisions. Hurricane Katrina struck the Gulf Coast on August 29, 2005, causing significant damage to Ingalls buildings and temporarily halting shipbuilding. Most vessels in dock escaped serious harm, and many vehicles and large overhead cranes remained usable. The shipyard rebuilt and resumed its role as a major defense manufacturing center. In the 2010s, Ingalls continued to expand its involvement in U.S. fleet programs. Its work included Arleigh Burke-class guided-missile destroyers, San Antonio-class amphibious transport docks, America-class large-deck amphibious assault ships, and Legend-class National Security Cutters for the Coast Guard. In 2015, the yard received additional destroyer, landing craft, and cutter work. In 2016, it received a contract for planning, advanced engineering, and long-lead procurement associated with another large-deck amphibious assault ship. The Pascagoula operation remains focused on technologically complex government vessels and is described as the largest private employer in Mississippi as of 2023.

1. 2016Large-deck amphibious assault ship engineering contract

   The shipyard received planning, advanced engineering, and long-lead procurement work for a future large-deck amphibious assault ship.

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2. 2015Additional destroyer, landing craft, and cutter work

   Ingalls received new U.S. government construction work covering destroyers, littoral combat ships, landing craft, and a National Security Cutter.

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3. 2011Huntington Ingalls Industries formed

   Northrop Grumman spun off its shipbuilding activities, including Ingalls, into Huntington Ingalls Industries.

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4. 2005Hurricane Katrina damaged the shipyard

   The Pascagoula facility suffered building damage and a temporary production interruption after Hurricane Katrina.

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5. 2001Ingalls entered Northrop Grumman's shipbuilding group

   Northrop Grumman acquired Litton Industries, bringing Ingalls into its corporate structure.

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6. 1977Employment reached a historical peak

   The shipyard reached a reported employment peak of 27,280 workers.

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7. 1968Facilities expanded across the Pascagoula River

   Litton expanded the shipyard's facilities to the other side of the river.

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8. 1961Acquisition by Litton Industries

   Litton Industries acquired Ingalls Shipbuilding.

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9. 1957Ingalls won a nuclear attack submarine contract

   The company secured a U.S. Navy contract to build twelve nuclear-powered attack submarines, accelerating its transition into advanced naval construction.

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10. 1941USS George Clymer associated with Liberty Fleet Day

    The Ingalls-built USS George Clymer took part in Liberty Fleet Day on September 27, 1941.

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11. 1938Ingalls Shipbuilding established in Pascagoula

    Robert Ingersoll Ingalls Sr. founded the shipbuilding company on the east bank of the Pascagoula River in Mississippi.

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A large-scale American defense shipyard focused on complex naval and coast-guard vessels, emphasizing engineering depth, industrial capacity, long-cycle government programs, and fleet sustainment.

• Arleigh Burke-class guided-missile destroyersNaval surface combatant

  Ingalls builds Arleigh Burke-class guided-missile destroyers for the U.S. Navy. These are complex, multi-mission surface combatants requiring integrated hull construction, propulsion, combat systems, sensors, weapons, and extensive testing. The program represents one of the shipyard's central long-term production activities.

• San Antonio-class amphibious transport docksAmphibious warfare ship

  The San Antonio class is a large amphibious transport dock program built for the U.S. Navy and Marine Corps. Ingalls' work includes construction and systems integration for ships designed to transport Marines, aircraft, landing craft, vehicles, and supplies in expeditionary operations.

• America-class amphibious assault shipsLarge-deck amphibious assault ship

  America-class ships are large-deck amphibious assault vessels intended to support Marine Corps aviation and expeditionary operations. Ingalls has performed construction and related engineering and procurement work for this class, which combines aviation facilities, command functions, troop support, and amphibious mission capabilities.

• Legend-class National Security CuttersCoast Guard cutter

  Ingalls builds National Security Cutters for the United States Coast Guard. These high-endurance vessels support maritime security, law enforcement, defense, and long-range patrol missions. The class is among the Coast Guard's most capable platforms and has been an important non-Navy production line at Pascagoula.

• Commercial and merchant shipsCommercial vessel1938

  Commercial shipbuilding was Ingalls' original business focus. The yard produced merchant and other civilian vessels before its later concentration on naval and government work. This early commercial base supplied the manufacturing experience that supported the company's subsequent expansion into military shipbuilding.

• Model 4-S diesel-electric locomotiveLocomotive

  In the 1940s, Ingalls briefly attempted to diversify into diesel-electric locomotives. Its Model 4-S was reportedly represented by a single completed example sold to the Gulf, Mobile & Ohio Railroad, making the product a short-lived experiment rather than a continuing business line.

• Covered hopper railroad carsRailroad equipment1980

  During the early 1980s, Ingalls manufactured approximately 4,000 covered hopper railroad cars, primarily for the leasing market through North American Car. This diversification reflected the company's broader industrial manufacturing capabilities but was later discontinued.

• 2016Advanced planning for a future large-deck amphibious assault shipStrategy

  The Navy began preparatory work for a future large-deck amphibious assault ship before full-scale construction.

  What changed. Ingalls received a contract for planning, advanced engineering, and procurement of long-lead materials.

  Aftermath. The contract positioned the shipyard for continued participation in the Navy's large-deck amphibious ship program.

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• 2015Expanded naval and Coast Guard construction commitmentsProduct launch

  The U.S. Navy and Coast Guard continued fleet modernization and awarded Ingalls additional work for destroyers, landing craft, and National Security Cutters.

  What changed. Ingalls accepted construction contracts and contract modifications for multiple government vessel programs.

  Aftermath. The awards reinforced Ingalls' role as a principal builder of U.S. surface combatants, amphibious ships, and cutters.

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• 2011Separation from Northrop Grumman into Huntington Ingalls IndustriesM&A

  Northrop Grumman decided to separate its shipbuilding sector, including Ingalls Shipbuilding, into an independent public company.

  What changed. Ingalls became part of Huntington Ingalls Industries on March 31, 2011.

  Aftermath. The transaction created HII as the parent organization and preserved Ingalls as a principal shipbuilding division.

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• 2016Ingalls received planning and procurement work for a large-deck amphibious assault ship

  The U.S. Navy awarded Ingalls a contract covering planning, advanced engineering, and long-lead material procurement for its next large-deck amphibious assault ship.

  Product launch
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• 2015Ingalls received contracts for destroyers, landing craft, and cutters

  The shipyard received U.S. government work connected with new destroyers, littoral combat ships, landing craft, and the eighth National Security Cutter.

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• 2011Ingalls Shipbuilding became part of Huntington Ingalls Industries

  Northrop Grumman spun off its shipbuilding sector, including Ingalls Shipbuilding, into the newly formed Huntington Ingalls Industries.

  M&A
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• 2005Ingalls facilities damaged by Hurricane Katrina

  Hurricane Katrina damaged buildings and disrupted shipbuilding at the Pascagoula facility, although most ships in dock and major cranes avoided serious damage.

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1. Ingalls Shipbuilding
2. Ingalls Shipbuilding official division page