﻿<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" returnVersion="2017v2.3">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2018-11-14T16:36:40-05:00</ReturnTs>
    <TaxPeriodEndDt>2018-06-30</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>205551179</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>AMBROSI DONAHUE CONGDON &amp; CO PC</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>ONE HARRIS STREET</AddressLine1Txt>
        <CityNm>NEWBURYPORT</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>01950</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990</ReturnTypeCd>
    <TaxPeriodBeginDt>2017-07-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>264349122</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>UNITED STATES LIGHTSHIP MUSEUM INC</BusinessNameLine1Txt>
      </BusinessName>
      <BusinessNameControlTxt>UNIT</BusinessNameControlTxt>
      <USAddress>
        <AddressLine1Txt>36A BEACHVIEW RD</AddressLine1Txt>
        <CityNm>EAST BOSTON</CityNm>
        <StateAbbreviationCd>MA</StateAbbreviationCd>
        <ZIPCd>02128</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>ROBERT M MANNINO JR</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>6177970135</PhoneNum>
      <SignatureDt>2018-11-14</SignatureDt>
      <DiscussWithPaidPreparerInd>true</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>KEITH N CONGDON CPA</PreparerPersonNm>
      <PTIN>P00362122</PTIN>
      <PhoneNum>9784626674</PhoneNum>
      <PreparationDt>2018-11-14</PreparationDt>
    </PreparerPersonGrp>
    <FilingSecurityInformation>
      <IPAddress>
        <IPv4AddressTxt>75.144.132.109</IPv4AddressTxt>
      </IPAddress>
      <IPDt>2018-11-14</IPDt>
      <IPTm>15:36:40</IPTm>
      <IPTimezoneCd>CS</IPTimezoneCd>
      <FilingLicenseTypeCd>P</FilingLicenseTypeCd>
      <AtSubmissionCreationDeviceId>EF7699BBBAEABD25A1D9326633F1B3BB0BA5D942</AtSubmissionCreationDeviceId>
      <AtSubmissionFilingDeviceId>97E1C8725EA29E820435AA4C2A99DC92B5BA0B0F</AtSubmissionFilingDeviceId>
    </FilingSecurityInformation>
    <TaxYr>2017</TaxYr>
    <BuildTS>2019-02-21 02:37:17Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="7">
    <IRS990 documentId="RetDoc3" referenceDocumentId="RetDoc7">
      <PrincipalOfficerNm>ROBERT M MANNINO JR</PrincipalOfficerNm>
      <USAddress>
        <AddressLine1Txt>241 MAIN AVE</AddressLine1Txt>
        <CityNm>SOUTH HAMPTON</CityNm>
        <StateAbbreviationCd>NH</StateAbbreviationCd>
        <ZIPCd>03827</ZIPCd>
      </USAddress>
      <GrossReceiptsAmt>111317</GrossReceiptsAmt>
      <GroupReturnForAffiliatesInd>false</GroupReturnForAffiliatesInd>
      <Organization501c3Ind>X</Organization501c3Ind>
      <WebsiteAddressTxt>WWW.NANTUCKETLIGHTSHIPLV-112.ORG</WebsiteAddressTxt>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <FormationYr>2009</FormationYr>
      <LegalDomicileStateCd>MA</LegalDomicileStateCd>
      <ActivityOrMissionDesc>TO SAVE, RESTORE, AND PRESERVE NANTUCKET LIGTHTSHIP/LV-112 AS A MUSEUM AND FLOATING LEARNING CENTER OPEN TO THE GENERAL PUBLIC. NANTUCKET LIGTHTSHIP/LV-112 IS A NATIONAL HISTORIC LANDMARK AND NATIONAL TREASURE THAT IS BERTHED IN BOSTON HARBOR (HOMEPORT).</ActivityOrMissionDesc>
      <VotingMembersGoverningBodyCnt>7</VotingMembersGoverningBodyCnt>
      <VotingMembersIndependentCnt>7</VotingMembersIndependentCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <TotalVolunteersCnt>24</TotalVolunteersCnt>
      <TotalGrossUBIAmt>0</TotalGrossUBIAmt>
      <PYContributionsGrantsAmt>198664</PYContributionsGrantsAmt>
      <CYContributionsGrantsAmt>111316</CYContributionsGrantsAmt>
      <CYProgramServiceRevenueAmt>0</CYProgramServiceRevenueAmt>
      <CYInvestmentIncomeAmt>1</CYInvestmentIncomeAmt>
      <CYOtherRevenueAmt>0</CYOtherRevenueAmt>
      <PYTotalRevenueAmt>198664</PYTotalRevenueAmt>
      <CYTotalRevenueAmt>111317</CYTotalRevenueAmt>
      <CYGrantsAndSimilarPaidAmt>0</CYGrantsAndSimilarPaidAmt>
      <CYBenefitsPaidToMembersAmt>0</CYBenefitsPaidToMembersAmt>
      <CYSalariesCompEmpBnftPaidAmt>0</CYSalariesCompEmpBnftPaidAmt>
      <CYTotalProfFndrsngExpnsAmt>0</CYTotalProfFndrsngExpnsAmt>
      <CYTotalFundraisingExpenseAmt>48029</CYTotalFundraisingExpenseAmt>
      <PYOtherExpensesAmt>83027</PYOtherExpensesAmt>
      <CYOtherExpensesAmt>86294</CYOtherExpensesAmt>
      <PYTotalExpensesAmt>83027</PYTotalExpensesAmt>
      <CYTotalExpensesAmt>86294</CYTotalExpensesAmt>
      <PYRevenuesLessExpensesAmt>115637</PYRevenuesLessExpensesAmt>
      <CYRevenuesLessExpensesAmt>25023</CYRevenuesLessExpensesAmt>
      <TotalAssetsBOYAmt>30971</TotalAssetsBOYAmt>
      <TotalAssetsEOYAmt>17869</TotalAssetsEOYAmt>
      <TotalLiabilitiesBOYAmt>2825</TotalLiabilitiesBOYAmt>
      <TotalLiabilitiesEOYAmt>0</TotalLiabilitiesEOYAmt>
      <NetAssetsOrFundBalancesBOYAmt>28146</NetAssetsOrFundBalancesBOYAmt>
      <NetAssetsOrFundBalancesEOYAmt>17869</NetAssetsOrFundBalancesEOYAmt>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <MissionDesc>TO SAVE, RESTORE, AND PRESERVE NANTUCKET LIGTHTSHIP/LV-112 AS A MUSEUM AND FLOATING LEARNING CENTER OPEN TO THE GENERAL PUBLIC. NANTUCKET LIGTHTSHIP/LV-112 IS A NATIONAL HISTORIC LANDMARK AND NATIONAL TREASURE THAT IS BERTHED IN BOSTON HARBOR (HOMEPORT).</MissionDesc>
      <SignificantNewProgramSrvcInd>false</SignificantNewProgramSrvcInd>
      <SignificantChangeInd>false</SignificantChangeInd>
      <ExpenseAmt>27152</ExpenseAmt>
      <Desc>RESTORE THE SHIPBOARD ELECTRICAL INCLUDING AUXILIARY AND MAIN LIGHT BEACONS, THE COMPRESSED AIR SYSTEM, RADIO BEACON ANTENNA STRUCTURE ON THE FORE AND MAIN MASTS OF THE NANTUCKET LIGHTSHIP LV-112</Desc>
      <TotalProgramServiceExpensesAmt>27152</TotalProgramServiceExpensesAmt>
      <DescribedInSection501c3Ind referenceDocumentId="RetDoc8">true</DescribedInSection501c3Ind>
      <ScheduleBRequiredInd referenceDocumentId="RetDoc1">true</ScheduleBRequiredInd>
      <PoliticalCampaignActyInd>false</PoliticalCampaignActyInd>
      <LobbyingActivitiesInd>false</LobbyingActivitiesInd>
      <SubjectToProxyTaxInd>false</SubjectToProxyTaxInd>
      <DonorAdvisedFundInd referenceDocumentId="RetDoc4">false</DonorAdvisedFundInd>
      <ConservationEasementsInd referenceDocumentId="RetDoc4">false</ConservationEasementsInd>
      <CollectionsOfArtInd referenceDocumentId="RetDoc4">true</CollectionsOfArtInd>
      <CreditCounselingInd referenceDocumentId="RetDoc4">false</CreditCounselingInd>
      <TempOrPermanentEndowmentsInd referenceDocumentId="RetDoc4">false</TempOrPermanentEndowmentsInd>
      <ReportLandBuildingEquipmentInd referenceDocumentId="RetDoc4">true</ReportLandBuildingEquipmentInd>
      <ReportInvestmentsOtherSecInd referenceDocumentId="RetDoc4">false</ReportInvestmentsOtherSecInd>
      <ReportProgramRelatedInvstInd referenceDocumentId="RetDoc4">false</ReportProgramRelatedInvstInd>
      <ReportOtherAssetsInd referenceDocumentId="RetDoc4">true</ReportOtherAssetsInd>
      <ReportOtherLiabilitiesInd referenceDocumentId="RetDoc4">false</ReportOtherLiabilitiesInd>
      <IncludeFIN48FootnoteInd referenceDocumentId="RetDoc4">false</IncludeFIN48FootnoteInd>
      <IndependentAuditFinclStmtInd referenceDocumentId="RetDoc4">false</IndependentAuditFinclStmtInd>
      <ConsolidatedAuditFinclStmtInd referenceDocumentId="RetDoc4">false</ConsolidatedAuditFinclStmtInd>
      <SchoolOperatingInd>false</SchoolOperatingInd>
      <ForeignOfficeInd>false</ForeignOfficeInd>
      <ForeignActivitiesInd>false</ForeignActivitiesInd>
      <MoreThan5000KToOrgInd>false</MoreThan5000KToOrgInd>
      <MoreThan5000KToIndividualsInd>false</MoreThan5000KToIndividualsInd>
      <ProfessionalFundraisingInd>false</ProfessionalFundraisingInd>
      <FundraisingActivitiesInd>false</FundraisingActivitiesInd>
      <GamingActivitiesInd>false</GamingActivitiesInd>
      <OperateHospitalInd>false</OperateHospitalInd>
      <GrantsToOrganizationsInd>false</GrantsToOrganizationsInd>
      <GrantsToIndividualsInd>false</GrantsToIndividualsInd>
      <ScheduleJRequiredInd>false</ScheduleJRequiredInd>
      <TaxExemptBondsInd>false</TaxExemptBondsInd>
      <EngagedInExcessBenefitTransInd referenceDocumentId="RetDoc5">false</EngagedInExcessBenefitTransInd>
      <PYExcessBenefitTransInd referenceDocumentId="RetDoc5">false</PYExcessBenefitTransInd>
      <LoanOutstandingInd referenceDocumentId="RetDoc5">false</LoanOutstandingInd>
      <GrantToRelatedPersonInd referenceDocumentId="RetDoc5">false</GrantToRelatedPersonInd>
      <BusinessRlnWithOrgMemInd referenceDocumentId="RetDoc5">false</BusinessRlnWithOrgMemInd>
      <BusinessRlnWithFamMemInd referenceDocumentId="RetDoc5">true</BusinessRlnWithFamMemInd>
      <BusinessRlnWithOfficerEntInd referenceDocumentId="RetDoc5">false</BusinessRlnWithOfficerEntInd>
      <DeductibleNonCashContriInd referenceDocumentId="RetDoc6">true</DeductibleNonCashContriInd>
      <DeductibleArtContributionInd referenceDocumentId="RetDoc6">false</DeductibleArtContributionInd>
      <TerminateOperationsInd>false</TerminateOperationsInd>
      <PartialLiquidationInd>false</PartialLiquidationInd>
      <DisregardedEntityInd>false</DisregardedEntityInd>
      <RelatedEntityInd>false</RelatedEntityInd>
      <RelatedOrganizationCtrlEntInd>false</RelatedOrganizationCtrlEntInd>
      <TrnsfrExmptNonChrtblRltdOrgInd>false</TrnsfrExmptNonChrtblRltdOrgInd>
      <ActivitiesConductedPrtshpInd>false</ActivitiesConductedPrtshpInd>
      <ScheduleORequiredInd>true</ScheduleORequiredInd>
      <IRPDocumentCnt>1</IRPDocumentCnt>
      <IRPDocumentW2GCnt>0</IRPDocumentW2GCnt>
      <BackupWthldComplianceInd>false</BackupWthldComplianceInd>
      <EmployeeCnt>0</EmployeeCnt>
      <UnrelatedBusIncmOverLimitInd>false</UnrelatedBusIncmOverLimitInd>
      <ForeignFinancialAccountInd>false</ForeignFinancialAccountInd>
      <ProhibitedTaxShelterTransInd>false</ProhibitedTaxShelterTransInd>
      <TaxablePartyNotificationInd>false</TaxablePartyNotificationInd>
      <NondeductibleContributionsInd>false</NondeductibleContributionsInd>
      <QuidProQuoContributionsInd>false</QuidProQuoContributionsInd>
      <Form8282PropertyDisposedOfInd>false</Form8282PropertyDisposedOfInd>
      <RcvFndsToPayPrsnlBnftCntrctInd>false</RcvFndsToPayPrsnlBnftCntrctInd>
      <PayPremiumsPrsnlBnftCntrctInd>false</PayPremiumsPrsnlBnftCntrctInd>
      <Form8899Filedind>false</Form8899Filedind>
      <Form1098CFiledInd>false</Form1098CFiledInd>
      <IndoorTanningServicesInd>false</IndoorTanningServicesInd>
      <InfoInScheduleOPartVIInd>X</InfoInScheduleOPartVIInd>
      <GoverningBodyVotingMembersCnt>7</GoverningBodyVotingMembersCnt>
      <IndependentVotingMemberCnt>7</IndependentVotingMemberCnt>
      <FamilyOrBusinessRlnInd>false</FamilyOrBusinessRlnInd>
      <DelegationOfMgmtDutiesInd>false</DelegationOfMgmtDutiesInd>
      <ChangeToOrgDocumentsInd>false</ChangeToOrgDocumentsInd>
      <MaterialDiversionOrMisuseInd>false</MaterialDiversionOrMisuseInd>
      <MembersOrStockholdersInd>false</MembersOrStockholdersInd>
      <ElectionOfBoardMembersInd>false</ElectionOfBoardMembersInd>
      <DecisionsSubjectToApprovaInd>false</DecisionsSubjectToApprovaInd>
      <MinutesOfGoverningBodyInd>true</MinutesOfGoverningBodyInd>
      <MinutesOfCommitteesInd>true</MinutesOfCommitteesInd>
      <OfficerMailingAddressInd>false</OfficerMailingAddressInd>
      <LocalChaptersInd>false</LocalChaptersInd>
      <Form990ProvidedToGvrnBodyInd>true</Form990ProvidedToGvrnBodyInd>
      <ConflictOfInterestPolicyInd>true</ConflictOfInterestPolicyInd>
      <AnnualDisclosureCoveredPrsnInd>false</AnnualDisclosureCoveredPrsnInd>
      <RegularMonitoringEnfrcInd>false</RegularMonitoringEnfrcInd>
      <WhistleblowerPolicyInd>true</WhistleblowerPolicyInd>
      <DocumentRetentionPolicyInd>true</DocumentRetentionPolicyInd>
      <CompensationProcessCEOInd>false</CompensationProcessCEOInd>
      <CompensationProcessOtherInd>false</CompensationProcessOtherInd>
      <InvestmentInJointVentureInd>false</InvestmentInJointVentureInd>
      <StatesWhereCopyOfReturnIsFldCd>MA</StatesWhereCopyOfReturnIsFldCd>
      <UponRequestInd>X</UponRequestInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>UNITED STATES LIGHTSHIP MUSEUM</BusinessNameLine1Txt>
        </BusinessName>
        <PhoneNum>6177970135</PhoneNum>
        <USAddress>
          <AddressLine1Txt>72 RIVER RIDGE</AddressLine1Txt>
          <CityNm>SUDBURY</CityNm>
          <StateAbbreviationCd>MA</StateAbbreviationCd>
          <ZIPCd>01776</ZIPCd>
        </USAddress>
      </BooksInCareOfDetail>
      <NoListedPersonsCompensatedInd>X</NoListedPersonsCompensatedInd>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT M MANNINO JR</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHoursPerWeekRt>36.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>SUSAN M WHITTEMORE OLIVEIRA</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHoursPerWeekRt>4.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>RONALD J JANARD</PersonNm>
        <TitleTxt>CLERK</TitleTxt>
        <AverageHoursPerWeekRt>1.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>DEBORAH N GERTSEN</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>PETER A BRUNK</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>2.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>JOHN ROGERS</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>8.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <Form990PartVIISectionAGrp>
        <PersonNm>ROBERT DINSMORE</PersonNm>
        <TitleTxt>DIRECTOR</TitleTxt>
        <AverageHoursPerWeekRt>3.00</AverageHoursPerWeekRt>
        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
      </Form990PartVIISectionAGrp>
      <FormerOfcrEmployeesListedInd>false</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>false</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>false</CompensationFromOtherSrcsInd>
      <RelatedOrganizationsAmt>27880</RelatedOrganizationsAmt>
      <AllOtherContributionsAmt>83436</AllOtherContributionsAmt>
      <NoncashContributionsAmt>81205</NoncashContributionsAmt>
      <TotalContributionsAmt>111316</TotalContributionsAmt>
      <InvestmentIncomeGrp>
        <TotalRevenueColumnAmt>1</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1</RelatedOrExemptFuncIncomeAmt>
      </InvestmentIncomeGrp>
      <TotalRevenueGrp>
        <TotalRevenueColumnAmt>111317</TotalRevenueColumnAmt>
        <RelatedOrExemptFuncIncomeAmt>1</RelatedOrExemptFuncIncomeAmt>
      </TotalRevenueGrp>
      <FeesForServicesAccountingGrp>
        <TotalAmt>2325</TotalAmt>
        <ManagementAndGeneralAmt>2325</ManagementAndGeneralAmt>
      </FeesForServicesAccountingGrp>
      <AdvertisingGrp>
        <TotalAmt>24091</TotalAmt>
        <FundraisingAmt>24091</FundraisingAmt>
      </AdvertisingGrp>
      <OfficeExpensesGrp>
        <TotalAmt>5696</TotalAmt>
        <ProgramServicesAmt>604</ProgramServicesAmt>
        <ManagementAndGeneralAmt>5092</ManagementAndGeneralAmt>
      </OfficeExpensesGrp>
      <TravelGrp>
        <TotalAmt>83</TotalAmt>
        <ManagementAndGeneralAmt>83</ManagementAndGeneralAmt>
      </TravelGrp>
      <DepreciationDepletionGrp>
        <TotalAmt>1264</TotalAmt>
        <ProgramServicesAmt>1264</ProgramServicesAmt>
      </DepreciationDepletionGrp>
      <InsuranceGrp>
        <TotalAmt>5929</TotalAmt>
        <ProgramServicesAmt>5929</ProgramServicesAmt>
      </InsuranceGrp>
      <OtherExpensesGrp>
        <Desc>PROMOTIONAL DEVELOPMENT</Desc>
        <TotalAmt>21700</TotalAmt>
        <FundraisingAmt>21700</FundraisingAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>BERTH AND UTILITIES</Desc>
        <TotalAmt>18000</TotalAmt>
        <ProgramServicesAmt>18000</ProgramServicesAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>UTILITIES</Desc>
        <TotalAmt>2084</TotalAmt>
        <ManagementAndGeneralAmt>2084</ManagementAndGeneralAmt>
      </OtherExpensesGrp>
      <OtherExpensesGrp>
        <Desc>EVENT: FOOD AND SUPPLIES</Desc>
        <TotalAmt>2077</TotalAmt>
        <FundraisingAmt>2077</FundraisingAmt>
      </OtherExpensesGrp>
      <AllOtherExpensesGrp>
        <TotalAmt>3045</TotalAmt>
        <ProgramServicesAmt>1355</ProgramServicesAmt>
        <ManagementAndGeneralAmt>1529</ManagementAndGeneralAmt>
        <FundraisingAmt>161</FundraisingAmt>
      </AllOtherExpensesGrp>
      <TotalFunctionalExpensesGrp>
        <TotalAmt>86294</TotalAmt>
        <ProgramServicesAmt>27152</ProgramServicesAmt>
        <ManagementAndGeneralAmt>11113</ManagementAndGeneralAmt>
        <FundraisingAmt>48029</FundraisingAmt>
      </TotalFunctionalExpensesGrp>
      <CashNonInterestBearingGrp>
        <BOYAmt>15057</BOYAmt>
        <EOYAmt>2320</EOYAmt>
      </CashNonInterestBearingGrp>
      <LandBldgEquipCostOrOtherBssAmt>6323</LandBldgEquipCostOrOtherBssAmt>
      <LandBldgEquipAccumDeprecAmt>4954</LandBldgEquipAccumDeprecAmt>
      <LandBldgEquipBasisNetGrp>
        <BOYAmt>2634</BOYAmt>
        <EOYAmt>1369</EOYAmt>
      </LandBldgEquipBasisNetGrp>
      <OtherAssetsTotalGrp>
        <BOYAmt>13280</BOYAmt>
        <EOYAmt>14180</EOYAmt>
      </OtherAssetsTotalGrp>
      <TotalAssetsGrp>
        <BOYAmt>30971</BOYAmt>
        <EOYAmt>17869</EOYAmt>
      </TotalAssetsGrp>
      <AccountsPayableAccrExpnssGrp>
        <BOYAmt>2825</BOYAmt>
      </AccountsPayableAccrExpnssGrp>
      <TotalLiabilitiesGrp>
        <BOYAmt>2825</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </TotalLiabilitiesGrp>
      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
      <UnrestrictedNetAssetsGrp>
        <BOYAmt>28146</BOYAmt>
        <EOYAmt>17869</EOYAmt>
      </UnrestrictedNetAssetsGrp>
      <TotalNetAssetsFundBalanceGrp>
        <BOYAmt>28146</BOYAmt>
        <EOYAmt>17869</EOYAmt>
      </TotalNetAssetsFundBalanceGrp>
      <TotLiabNetAssetsFundBalanceGrp>
        <BOYAmt>30971</BOYAmt>
        <EOYAmt>17869</EOYAmt>
      </TotLiabNetAssetsFundBalanceGrp>
      <InfoInScheduleOPartXIInd>X</InfoInScheduleOPartXIInd>
      <ReconcilationRevenueExpnssAmt>25023</ReconcilationRevenueExpnssAmt>
      <OtherChangesInNetAssetsAmt>-35300</OtherChangesInNetAssetsAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>false</AccountantCompileOrReviewInd>
      <FSAuditedInd>false</FSAuditedInd>
    </IRS990>
    <IRS990ScheduleA documentId="RetDoc8">
      <PubliclySupportedOrg509a2Ind>X</PubliclySupportedOrg509a2Ind>
      <GiftsGrantsContrisRcvd509Grp>
        <CurrentTaxYearMinus4YearsAmt>147056</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>279909</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>106940</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>198643</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>83436</CurrentTaxYearAmt>
        <TotalAmt>815984</TotalAmt>
      </GiftsGrantsContrisRcvd509Grp>
      <GrossReceiptsAdmissionsGrp>
        <CurrentTaxYearMinus3YearsAmt>4320</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>16380</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>26380</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>27880</CurrentTaxYearAmt>
        <TotalAmt>74960</TotalAmt>
      </GrossReceiptsAdmissionsGrp>
      <Total509Grp>
        <CurrentTaxYearMinus4YearsAmt>147056</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>284229</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>123320</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>225023</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>111316</CurrentTaxYearAmt>
        <TotalAmt>890944</TotalAmt>
      </Total509Grp>
      <PublicSupportTotal509Amt>890944</PublicSupportTotal509Amt>
      <GrossInvestmentIncome509Grp>
        <CurrentTaxYearMinus3YearsAmt>19</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>4</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearAmt>1</CurrentTaxYearAmt>
        <TotalAmt>24</TotalAmt>
      </GrossInvestmentIncome509Grp>
      <InvestmentIncomeAndUBTIGrp>
        <CurrentTaxYearMinus3YearsAmt>19</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>4</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearAmt>1</CurrentTaxYearAmt>
        <TotalAmt>24</TotalAmt>
      </InvestmentIncomeAndUBTIGrp>
      <TotalSupportCalendarYearGrp>
        <CurrentTaxYearMinus4YearsAmt>147056</CurrentTaxYearMinus4YearsAmt>
        <CurrentTaxYearMinus3YearsAmt>284248</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>123324</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>225023</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>111317</CurrentTaxYearAmt>
        <TotalAmt>890968</TotalAmt>
      </TotalSupportCalendarYearGrp>
      <PublicSupportCY509Pct>1.00000</PublicSupportCY509Pct>
      <PublicSupportPY509Pct>1.00000</PublicSupportPY509Pct>
      <InvestmentIncomeCYPct>0.00000</InvestmentIncomeCYPct>
      <InvestmentIncomePYPct>0.00000</InvestmentIncomePYPct>
      <ThirtyThrPctSuprtTestsCY509Ind>X</ThirtyThrPctSuprtTestsCY509Ind>
    </IRS990ScheduleA>
    <IRS990ScheduleB documentId="RetDoc1" />
    <IRS990ScheduleD documentId="RetDoc4">
      <CollectionUsedPubExhibitionInd>X</CollectionUsedPubExhibitionInd>
      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>false</SolicitedAssetsSaleInd>
      <EquipmentGrp>
        <OtherCostOrOtherBasisAmt>6323</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>4954</DepreciationAmt>
        <BookValueAmt>1369</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>1369</TotalBookValueLandBuildingsAmt>
      <OtherAssetsOrgGrp>
        <BookValueAmt>14180</BookValueAmt>
      </OtherAssetsOrgGrp>
      <TotalBookValueOtherAssetsAmt>14180</TotalBookValueOtherAssetsAmt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>SCHEDULE D, PAGE 4, PART XIII</FormAndLineReferenceDesc>
        <ExplanationTxt>PART III, LINE 4 - COLLECTIONS AND RELATION TO EXEMPT PURPOSE THE ORGANIZATION'S COLLECTIONS INCLUDE THE NANTUCKET LIGHTSHIP (LV-112) AND OTHER EQUIPMENT USED TO BERTH THE SHIP AT THE BOSTON HARBOR SHIPYARD AND MARINA. THE MARKET VALUE OF SCAPPED STEEL OF THE SHIP IS APPROXIMATELY 144K. ALSO, THERE ARE TWO BARGES THAT ARE VALUED AT 80K EACH.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleD>
    <IRS990ScheduleL documentId="RetDoc5">
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>CPAUL COMMUNICATION</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>FAMILY MEMBER</RelationshipDescriptionTxt>
        <TransactionAmt>4380</TransactionAmt>
        <TransactionDesc>STORAGE SPACE</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
      <BusTrInvolveInterestedPrsnGrp>
        <NameOfInterested>
          <BusinessName>
            <BusinessNameLine1Txt>CPAUL COMMUNICATION</BusinessNameLine1Txt>
          </BusinessName>
        </NameOfInterested>
        <RelationshipDescriptionTxt>FAMILY MEMBER</RelationshipDescriptionTxt>
        <TransactionAmt>23500</TransactionAmt>
        <TransactionDesc>FUNDRAISING PR</TransactionDesc>
        <SharingOfRevenuesInd>false</SharingOfRevenuesInd>
      </BusTrInvolveInterestedPrsnGrp>
    </IRS990ScheduleL>
    <IRS990ScheduleM documentId="RetDoc6">
      <OtherNonCashContriTableGrp>
        <NonCashCheckboxInd>X</NonCashCheckboxInd>
        <Desc>IN-KIND DONATIO</Desc>
        <ContributionCnt>4</ContributionCnt>
        <NoncashContributionsRptF990Amt>81205</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FAIR MARKET VALUE</MethodOfDeterminingRevenuesTxt>
      </OtherNonCashContriTableGrp>
      <AnyPropertyThatMustBeHeldInd>false</AnyPropertyThatMustBeHeldInd>
      <ReviewProcessUnusualNCGiftsInd>false</ReviewProcessUnusualNCGiftsInd>
      <ThirdPartiesUsedInd>false</ThirdPartiesUsedInd>
    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc7">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>TO SAVE, RESTORE, AND PRESERVE NANTUCKET LIGTHTSHIP/LV-112 AS A MUSEUM AND FLOATING LEARNING CENTER OPEN TO THE GENERAL PUBLIC. NANTUCKET LIGTHTSHIP/LV-112 IS A NATIONAL HISTORIC LANDMARK AND NATIONAL TREASURE THAT IS BERTHED IN BOSTON HARBOR (HOMEPORT).</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE RETURN IS REVIEWED AND APPROVED BY THE PRESIDENT AND TREASURER BEFORE BEING FILED.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>GOVERNING DOCUMENTS ARE AVAILABLE ON REQUEST</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>UNITED STATES LIGHT SHIP MUSEUM HAS RECEIVED FUNDS DESIGNATED TO SAVE, RESTORE AND PRESERVE THE NANTUCKET LIGHTSHIP/LV-112. THE DESIGNATED FUNDS WERE USED AND CAPITALIZED AS A HISTORICAL ASSET. COSTS OF 624,789 HAVE BEEN INCURRED TO DATE AND CAPITALIZED AS A HISTORICAL ASSET.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>