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        <PersonNm>Alfredo Giron</PersonNm>
        <TitleTxt>VP of ECOP (ended 12/31/22)</TitleTxt>
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        <IndividualTrusteeOrDirectorInd>X</IndividualTrusteeOrDirectorInd>
        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>0</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>0</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Christopher Ostrander</PersonNm>
        <TitleTxt>Chief Executive Officer</TitleTxt>
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        <OfficerInd>X</OfficerInd>
        <ReportableCompFromOrgAmt>161354</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>23454</OtherCompensationAmt>
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      <Form990PartVIISectionAGrp>
        <PersonNm>Kristina Norman</PersonNm>
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        <HighestCompensatedEmployeeInd>X</HighestCompensatedEmployeeInd>
        <ReportableCompFromOrgAmt>130053</ReportableCompFromOrgAmt>
        <ReportableCompFromRltdOrgAmt>0</ReportableCompFromRltdOrgAmt>
        <OtherCompensationAmt>7545</OtherCompensationAmt>
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      <TotalReportableCompFromOrgAmt>291407</TotalReportableCompFromOrgAmt>
      <TotReportableCompRltdOrgAmt>0</TotReportableCompRltdOrgAmt>
      <TotalOtherCompensationAmt>30999</TotalOtherCompensationAmt>
      <IndivRcvdGreaterThan100KCnt>2</IndivRcvdGreaterThan100KCnt>
      <FormerOfcrEmployeesListedInd>0</FormerOfcrEmployeesListedInd>
      <TotalCompGreaterThan150KInd>1</TotalCompGreaterThan150KInd>
      <CompensationFromOtherSrcsInd>0</CompensationFromOtherSrcsInd>
      <ContractorCompensationGrp>
        <ContractorName>
          <BusinessName>
            <BusinessNameLine1Txt>Lydon Fetterolf Corydon PA</BusinessNameLine1Txt>
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        <ContractorAddress>
          <USAddress>
            <AddressLine1Txt>9401 Key West Avenue</AddressLine1Txt>
            <CityNm>Rockville</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20850</ZIPCd>
          </USAddress>
        </ContractorAddress>
        <ServicesDesc>Accounting Services</ServicesDesc>
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      <CntrctRcvdGreaterThan100KCnt>1</CntrctRcvdGreaterThan100KCnt>
      <GovernmentGrantsAmt>60309</GovernmentGrantsAmt>
      <AllOtherContributionsAmt>51911</AllOtherContributionsAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>Conferences and meetings</Desc>
        <BusinessCd>900099</BusinessCd>
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      <ProgramServiceRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>113861</RelatedOrExemptFuncIncomeAmt>
      </ProgramServiceRevenueGrp>
      <ProgramServiceRevenueGrp>
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        <RelatedOrExemptFuncIncomeAmt>33958</RelatedOrExemptFuncIncomeAmt>
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      <ProgramServiceRevenueGrp>
        <Desc>CURRENTS - MTS Newsletter</Desc>
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        <ExclusionAmt>2729</ExclusionAmt>
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      </GrossAmountSalesAssetsGrp>
      <LessCostOthBasisSalesExpnssGrp>
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      <NetGainOrLossInvestmentsGrp>
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        <ExclusionAmt>-5941</ExclusionAmt>
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      <NetIncmFromFundraisingEvtGrp>
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        <ExclusionAmt>124153</ExclusionAmt>
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        <Desc>Other revenue</Desc>
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        <ExclusionAmt>41421</ExclusionAmt>
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      <OtherRevenueTotalAmt>41421</OtherRevenueTotalAmt>
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        <ManagementAndGeneralAmt>25833</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>133381</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>23378</ManagementAndGeneralAmt>
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        <ManagementAndGeneralAmt>13268</ManagementAndGeneralAmt>
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      <InsuranceGrp>
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        <ProgramServicesAmt>139</ProgramServicesAmt>
        <ManagementAndGeneralAmt>27127</ManagementAndGeneralAmt>
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      <OtherExpensesGrp>
        <Desc>Section rebates</Desc>
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        <ProgramServicesAmt>3145</ProgramServicesAmt>
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      <TotalFunctionalExpensesGrp>
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        <ProgramServicesAmt>1979621</ProgramServicesAmt>
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        <EOYAmt>516010</EOYAmt>
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        <EOYAmt>7350561</EOYAmt>
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      <InvestmentIncomePYPct>0.07020</InvestmentIncomePYPct>
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        <ExplanationTxt>Other income - 2018 Amount: $ 4,712. 2019 Amount: $ 3,525. 2020 Amount: $ 0. 2021 Amount: $ 8,721. 2022 Amount: $ 41,421.</ExplanationTxt>
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        </ContributorBusinessName>
        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <DepreciationAmt>12801</DepreciationAmt>
        <BookValueAmt>3103</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>3103</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>Funds held for Oceans Conferences</Desc>
        <Amt>241502</Amt>
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      <FootnoteTextInd>X</FootnoteTextInd>
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      <NetUnrealizedGainsInvstAmt>424743</NetUnrealizedGainsInvstAmt>
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      <RevenueNotReportedFinclStmtAmt>10567</RevenueNotReportedFinclStmtAmt>
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      <DonatedServicesUseFcltsAmt>3500</DonatedServicesUseFcltsAmt>
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      <InvestmentExpensesNotIncld2Amt>10567</InvestmentExpensesNotIncld2Amt>
      <ExpensesNotRptFinclStmtAmt>10567</ExpensesNotRptFinclStmtAmt>
      <TotalExpensesPerForm990Amt>2575486</TotalExpensesPerForm990Amt>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part X, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>Management has evaluated MTS's tax positions and concluded that MTS's financial statements do not include any uncertain tax positions.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XI, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Special events direct expenses 118,975.</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part XII, Line 2d - Other Adjustments:</FormAndLineReferenceDesc>
        <ExplanationTxt>Special events direct expenses 118,975.</ExplanationTxt>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>Oceans Technology Conference</SpecificServicesProvidedTxt>
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      <AccountActivitiesOutsideUSGrp>
        <RegionTxt>Europe</RegionTxt>
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        <EmployeeCnt>0</EmployeeCnt>
        <TypeOfActivitiesConductedTxt>Program Services</TypeOfActivitiesConductedTxt>
        <SpecificServicesProvidedTxt>OCEANS 2023 Limerick</SpecificServicesProvidedTxt>
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      </AccountActivitiesOutsideUSGrp>
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      <SubtotalEmployeesCnt>0</SubtotalEmployeesCnt>
      <ContinuationTotalOfficeCnt>0</ContinuationTotalOfficeCnt>
      <ContinuationTotalEmployeeCnt>0</ContinuationTotalEmployeeCnt>
      <TotalOfficeCnt>0</TotalOfficeCnt>
      <TotalEmployeeCnt>0</TotalEmployeeCnt>
      <SubtotalSpentAmt>313245</SubtotalSpentAmt>
      <ContinuationSpentAmt>0</ContinuationSpentAmt>
      <TotalSpentAmt>313245</TotalSpentAmt>
      <TransferToForeignCorpInd>0</TransferToForeignCorpInd>
      <InterestInForeignTrustInd>0</InterestInForeignTrustInd>
      <ForeignCorpOwnershipInd>0</ForeignCorpOwnershipInd>
      <PassiveForeignInvestmestCoInd>0</PassiveForeignInvestmestCoInd>
      <ForeignPartnershipInd>0</ForeignPartnershipInd>
      <BoycottCountriesInd>0</BoycottCountriesInd>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, line 3:</FormAndLineReferenceDesc>
        <ExplanationTxt>Foreign expenses are directly tracked and accounted for on the accrual method of accounting.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part III Accounting Method:</FormAndLineReferenceDesc>
      </SupplementalInformationDetail>
    </IRS990ScheduleF>
    <IRS990ScheduleG documentId="RetDoc1041300001">
      <FundraisingEventInformationGrp>
        <Event1Nm>Houston Clays Shoot</Event1Nm>
        <GrossReceiptsEvent1Amt>110723</GrossReceiptsEvent1Amt>
        <GrossRevenueEvent1Amt>110723</GrossRevenueEvent1Amt>
        <RentFacilityCostsEvent1Amt>61137</RentFacilityCostsEvent1Amt>
        <FoodAndBeverageEvent1Amt>3640</FoodAndBeverageEvent1Amt>
        <Event2Nm>Buoy Workshop</Event2Nm>
        <GrossReceiptsEvent2Amt>69150</GrossReceiptsEvent2Amt>
        <GrossRevenueEvent2Amt>69150</GrossRevenueEvent2Amt>
        <RentFacilityCostsEvent2Amt>1040</RentFacilityCostsEvent2Amt>
        <FoodAndBeverageEvent2Amt>32640</FoodAndBeverageEvent2Amt>
        <OtherDirectExpensesEvent2Amt>7994</OtherDirectExpensesEvent2Amt>
        <OtherEventsTotalCnt>2</OtherEventsTotalCnt>
        <GrossReceiptsOtherEventsAmt>63255</GrossReceiptsOtherEventsAmt>
        <GrossRevenueOtherEventsAmt>63255</GrossRevenueOtherEventsAmt>
        <FoodAndBeverageOtherEventsAmt>12437</FoodAndBeverageOtherEventsAmt>
        <OthDirectExpnssOtherEventsAmt>87</OthDirectExpnssOtherEventsAmt>
        <GrossReceiptsTotalAmt>243128</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>243128</GrossRevenueTotalEventsAmt>
        <RentFcltyCostsTotalEventsAmt>62177</RentFcltyCostsTotalEventsAmt>
        <FoodAndBeverageTotalEventsAmt>48717</FoodAndBeverageTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>8081</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>118975</DirectExpenseSummaryEventsAmt>
        <NetIncomeSummaryAmt>124153</NetIncomeSummaryAmt>
      </FundraisingEventInformationGrp>
    </IRS990ScheduleG>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <GrantRecordsMaintainedInd>1</GrantRecordsMaintainedInd>
      <GrantsOtherAsstToIndivInUSGrp>
        <GrantTypeTxt>Tuition Scholarships/Awards</GrantTypeTxt>
        <RecipientCnt>17</RecipientCnt>
        <CashGrantAmt>61356</CashGrantAmt>
        <NonCashAssistanceAmt>0</NonCashAssistanceAmt>
      </GrantsOtherAsstToIndivInUSGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>An open solicitation for scholarship applications is held and applications are first reviewed by staff to ensure proper format and completeness. The prepared scholarship package is then sent to a committee for grading and selection of the recipients. Funds are disbursed directly to the bursar of the colleges attended who then apply funds to the scholarship winners' tuition.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleI>
    <IRS990ScheduleJ documentId="RetDoc1042400001">
      <PaymentsForUseOfResidenceInd>X</PaymentsForUseOfResidenceInd>
      <WrittenPolicyRefTAndEExpnssInd>1</WrittenPolicyRefTAndEExpnssInd>
      <SubstantiationRequiredInd>0</SubstantiationRequiredInd>
      <CompensationCommitteeInd>X</CompensationCommitteeInd>
      <CompensationSurveyInd>X</CompensationSurveyInd>
      <BoardOrCommitteeApprovalInd>X</BoardOrCommitteeApprovalInd>
      <SeverancePaymentInd>0</SeverancePaymentInd>
      <SupplementalNonqualRtrPlanInd>0</SupplementalNonqualRtrPlanInd>
      <EquityBasedCompArrngmInd>0</EquityBasedCompArrngmInd>
      <CompBasedOnRevenueOfFlngOrgInd>0</CompBasedOnRevenueOfFlngOrgInd>
      <CompBsdOnRevRelatedOrgsInd>0</CompBsdOnRevRelatedOrgsInd>
      <CompBsdNetEarnsFlngOrgInd>0</CompBsdNetEarnsFlngOrgInd>
      <CompBsdNetEarnsRltdOrgsInd>0</CompBsdNetEarnsRltdOrgsInd>
      <AnyNonFixedPaymentsInd>0</AnyNonFixedPaymentsInd>
      <InitialContractExceptionInd>0</InitialContractExceptionInd>
      <RltdOrgOfficerTrstKeyEmplGrp>
        <PersonNm>Christopher Ostrander</PersonNm>
        <TitleTxt>Chief Executive Officer</TitleTxt>
        <BaseCompensationFilingOrgAmt>134154</BaseCompensationFilingOrgAmt>
        <CompensationBasedOnRltdOrgsAmt>0</CompensationBasedOnRltdOrgsAmt>
        <BonusFilingOrganizationAmount>25000</BonusFilingOrganizationAmount>
        <BonusRelatedOrganizationsAmt>0</BonusRelatedOrganizationsAmt>
        <OtherCompensationFilingOrgAmt>2200</OtherCompensationFilingOrgAmt>
        <OtherCompensationRltdOrgsAmt>0</OtherCompensationRltdOrgsAmt>
        <DeferredCompensationFlngOrgAmt>6882</DeferredCompensationFlngOrgAmt>
        <DeferredCompRltdOrgsAmt>0</DeferredCompRltdOrgsAmt>
        <NontaxableBenefitsFilingOrgAmt>16572</NontaxableBenefitsFilingOrgAmt>
        <NontaxableBenefitsRltdOrgsAmt>0</NontaxableBenefitsRltdOrgsAmt>
        <TotalCompensationFilingOrgAmt>184808</TotalCompensationFilingOrgAmt>
        <TotalCompensationRltdOrgsAmt>0</TotalCompensationRltdOrgsAmt>
        <CompReportPrior990FilingOrgAmt>0</CompReportPrior990FilingOrgAmt>
        <CompReportPrior990RltdOrgsAmt>0</CompReportPrior990RltdOrgsAmt>
      </RltdOrgOfficerTrstKeyEmplGrp>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Part I, Line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>Employees receive a $200 per month stipend (amount subject to change annually) as a remote-working allowance to cover office related costs. This is reported as taxable compensation on Form W-2.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleJ>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 1a</FormAndLineReferenceDesc>
        <ExplanationTxt>The Executive Committee is comprised of the President, President Elect, and Immediate Past President. The Committee meets as needed to approve changes to CEO/Executive Director's salary and benefit package, CEO/Executive Director's tenure, and to carry out any other duties and actions identified by the Board of Directors.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 6</FormAndLineReferenceDesc>
        <ExplanationTxt>The Society has dues paying members. The classes of MTS membership are as follows: Individual member, Student member, Associate member, Emeritus member, Patron member, Corporate Gold member, Corporate Silver member, Corporate Platinum member, Life member, Small Business member, Institutional member, ECOP member. Any member shall be eligible to vote on any action, so long as the member's name appears on the rolls of the Society in good standing as of a date set by the Board not more than fifty (50) nor less than ten (10) days before the date of the meeting.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section A, line 7a</FormAndLineReferenceDesc>
        <ExplanationTxt>All officers shall be elected by a plurality of Members eligible to vote, in person and by proxy, at the Annual Meeting. Each Member is entitled to one vote.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 11b</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is prepared by an independent accounting firm and reviewed by the Society's Executive Director and Treasurer/VP of Budget and Finance. The 990 is then provided to the full Board of Directors prior to the filing with the Internal Revenue Service</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 12c</FormAndLineReferenceDesc>
        <ExplanationTxt>The Society requires completion of annual disclosure form of any potential conflicts of interest by all officers, directors, and committee chairs.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section B, line 15</FormAndLineReferenceDesc>
        <ExplanationTxt>The Society's Board of Directors approves the compensation of the CEO/Executive Director and documents the arrangement through an employment contract.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 18</FormAndLineReferenceDesc>
        <ExplanationTxt>Form 990 is made available to the public on the organization's website.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part VI, Section C, line 19</FormAndLineReferenceDesc>
        <ExplanationTxt>The Organization makes its Form 1023 available to the public upon request. The Organization makes its governing documents and conflicts of interest policy available to the public on its website. The financial statements are available to the public upon request.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>Form 990, Part XII, Line 2c:</FormAndLineReferenceDesc>
        <ExplanationTxt>The organization has a Budget and Finance Committee responsible for the oversight of the audit and selection of the independent accountant. The process has not changed from prior years.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
