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  <xs:element id="hii_EBPMaximumNumberOfCompanyMatchingContributionWithdrawalsPerQuarter" abstract="false" name="EBPMaximumNumberOfCompanyMatchingContributionWithdrawalsPerQuarter" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="hii_EBPEmployeeEligibleCompensationPercentAxis" abstract="true" name="EBPEmployeeEligibleCompensationPercentAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="hii_EBPEmployeeEligibleCompensationPercentDomain" abstract="true" name="EBPEmployeeEligibleCompensationPercentDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_FirstTwoPercentOfEligibleCompensationMember" abstract="true" name="FirstTwoPercentOfEligibleCompensationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_NextTwoPercentOfEligibleCompensationMember" abstract="true" name="NextTwoPercentOfEligibleCompensationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_NextFourPercentOfEligibleCompensationMember" abstract="true" name="NextFourPercentOfEligibleCompensationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_EBPEmployerContributionTypeAxis" abstract="true" name="EBPEmployerContributionTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="hii_EBPEmployerContributionTypeDomain" abstract="true" name="EBPEmployerContributionTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_EBPRetirementAccountContributionUnderAge35Member" abstract="true" name="EBPRetirementAccountContributionUnderAge35Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_EBPRetirementAccountContributionAge35Through49Member" abstract="true" name="EBPRetirementAccountContributionAge35Through49Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_EBPRetirementAccountContributionAge50AndAboveMember" abstract="true" name="EBPRetirementAccountContributionAge50AndAboveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="hii_EBPEmployerContributionRetirementAccountContributionPercentageOfCompensation" abstract="false" name="EBPEmployerContributionRetirementAccountContributionPercentageOfCompensation" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="hii_EBPPendingReceivable" abstract="false" name="EBPPendingReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hii_EBPAccruedBalanceReceivable" abstract="false" name="EBPAccruedBalanceReceivable" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="hii_EBPChangeInNetAssetAvailableForBenefitDecreaseFromAdministrativeAndInvestmentExpense" abstract="false" name="EBPChangeInNetAssetAvailableForBenefitDecreaseFromAdministrativeAndInvestmentExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
