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      <AllOtherExpenses>
        <Total>1513</Total>
        <ProgramServices>1513</ProgramServices>
      </AllOtherExpenses>
      <TotalFunctionalExpenses>
        <Total>608824</Total>
        <ProgramServices>366743</ProgramServices>
        <ManagementAndGeneral>242081</ManagementAndGeneral>
        <Fundraising>0</Fundraising>
      </TotalFunctionalExpenses>
      <CashNonInterestBearing>
        <BOY>35777</BOY>
        <EOY>18108</EOY>
      </CashNonInterestBearing>
      <SavingsAndTempCashInvestments>
        <BOY>398820</BOY>
        <EOY>1047563</EOY>
      </SavingsAndTempCashInvestments>
      <PrepaidExpensesDeferredCharges>
        <BOY>12521</BOY>
        <EOY>12521</EOY>
      </PrepaidExpensesDeferredCharges>
      <InvestmentsPubTradedSecurities>
        <BOY>14990333</BOY>
        <EOY>14277037</EOY>
      </InvestmentsPubTradedSecurities>
      <InvestmentsOtherSecurities>
        <BOY>1167798</BOY>
        <EOY>1168090</EOY>
      </InvestmentsOtherSecurities>
      <OtherAssetsTotal>
        <BOY>766566</BOY>
        <EOY>750348</EOY>
      </OtherAssetsTotal>
      <TotalAssets>
        <BOY>17371815</BOY>
        <EOY>17273667</EOY>
      </TotalAssets>
      <AccountsPayableAccruedExpenses>
        <BOY>4109</BOY>
        <EOY>2838</EOY>
      </AccountsPayableAccruedExpenses>
      <TotalLiabilities>
        <BOY>4109</BOY>
        <EOY>2838</EOY>
      </TotalLiabilities>
      <FollowSFAS117>X</FollowSFAS117>
      <UnrestrictedNetAssets>
        <BOY>16731420</BOY>
        <EOY>16634543</EOY>
      </UnrestrictedNetAssets>
      <PermanentlyRestrictedNetAssets>
        <BOY>636286</BOY>
        <EOY>636286</EOY>
      </PermanentlyRestrictedNetAssets>
      <TotalNetAssetsFundBalances>
        <BOY>17367706</BOY>
        <EOY>17270829</EOY>
      </TotalNetAssetsFundBalances>
      <TotalLiabNetAssetsFundBalances>
        <BOY>17371815</BOY>
        <EOY>17273667</EOY>
      </TotalLiabNetAssetsFundBalances>
      <InfoInScheduleOPartXI>X</InfoInScheduleOPartXI>
      <ReconcilationRevenueExpenses>2182404</ReconcilationRevenueExpenses>
      <ReconcilationOtherChanges>-2279281</ReconcilationOtherChanges>
      <InfoInScheduleOPartXII>X</InfoInScheduleOPartXII>
      <MethodOfAccountingOther note="Modified Cash Basis">X</MethodOfAccountingOther>
      <AccountantCompileOrReview>0</AccountantCompileOrReview>
      <FSAudited>1</FSAudited>
      <AuditCommittee>1</AuditCommittee>
      <FinancialStatementSeparate>X</FinancialStatementSeparate>
      <FederalGrantAuditRequired>0</FederalGrantAuditRequired>
    </IRS990>
    <IRS990ScheduleB documentId="RetDoc1234500001">
      <ContributorInfo>
        <ContributorNumber>RESTRICTED</ContributorNumber>
        <ContributorNameBusiness>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorNameBusiness>
        <ContributorAddressUS>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
        </ContributorAddressUS>
        <AggregateContributions>RESTRICTED</AggregateContributions>
      </ContributorInfo>
    </IRS990ScheduleB>
    <IRS990ScheduleC documentId="RetDoc1039700001">
      <SubstantiallyAllDuesNondeduct>1</SubstantiallyAllDuesNondeduct>
      <OnlyInHouseLobbying>0</OnlyInHouseLobbying>
      <AgreeToCarryoverPriorYear>0</AgreeToCarryoverPriorYear>
    </IRS990ScheduleC>
    <IRS990ScheduleD documentId="RetDoc1039900001">
      <ArtPublicExhibitionAmts>
        <AssetsInPartX>719396</AssetsInPartX>
      </ArtPublicExhibitionAmts>
      <CollectUsedForPublicExhibition>X</CollectUsedForPublicExhibition>
      <CollectUsedForPreservation>X</CollectUsedForPreservation>
      <SolicitedAssetsForSale>0</SolicitedAssetsForSale>
      <TotalOfBookValueLandBuildings>0</TotalOfBookValueLandBuildings>
      <OtherSecurities>
        <Description>Alternative Investments</Description>
        <BookValue>1168090</BookValue>
        <MethodOfValuation>F</MethodOfValuation>
      </OtherSecurities>
      <TotalOfBookValueSecurities>1168090</TotalOfBookValueSecurities>
      <TotalRevenue>2791228</TotalRevenue>
      <TotalExpenses>608824</TotalExpenses>
      <ExcessOrDeficitForYear>2182404</ExcessOrDeficitForYear>
      <NetUnrealizedGLOnInvestments>-2263063</NetUnrealizedGLOnInvestments>
      <OtherAmount>-16218</OtherAmount>
      <TotalAdjustments>-2279281</TotalAdjustments>
      <ExcessOrDeficitPerFS>-96877</ExcessOrDeficitPerFS>
      <TotRevenueEtcAuditedFinclStmt>583947</TotRevenueEtcAuditedFinclStmt>
      <NetUnrealizedGainsInvestments>-2263063</NetUnrealizedGainsInvestments>
      <DonatedSrvcAndUseOfFacilities>72000</DonatedSrvcAndUseOfFacilities>
      <OtherRevenues>-16218</OtherRevenues>
      <RevenueNotRptdF990>-2207281</RevenueNotRptdF990>
      <RevenueSubtotal>2791228</RevenueSubtotal>
      <RevenueNotRptdOnFinStmt>0</RevenueNotRptdOnFinStmt>
      <TotalRevenuePerForm990>2791228</TotalRevenuePerForm990>
      <TotExpensesEtcAuditedFinclStmt>680824</TotExpensesEtcAuditedFinclStmt>
      <DonatedServicesUseOfFacilities>72000</DonatedServicesUseOfFacilities>
      <ExpensesNotRptdF990>72000</ExpensesNotRptdF990>
      <ExpensesSubtotal>608824</ExpensesSubtotal>
      <ExpensesNotRptdOnFinStmt>0</ExpensesNotRptdOnFinStmt>
      <TotalExpensesPerForm990>608824</TotalExpensesPerForm990>
      <Form990ScheduleDPartXIV>
        <ReturnReference>Part III, Line 4:</ReturnReference>
        <Explanation>The Society has a collection of inexhaustible arts and books. The items are on display at the Society's offices located in the Boston National Historical Park. They reveal not only the history of a distinguished institution but also help tell the story of one of the America's oldest and most important ports.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>Description of Uncertain Tax Positions Under FIN 48:</Identifier>
        <ReturnReference>Part X:</ReturnReference>
        <Explanation>In accordance with Section 501(c)(3) of the Internal Revenue Code, the Society is exempt from federal and state income taxes and, accordingly, the financial statements do not reflect a provision for income taxes. These determinations have been reviewed according to guidance in a recent Financial Accounting Standards Board pronouncement related to accounting for uncertainty in income taxes. In determining the recognition of uncertain tax positions, the Society now applies a more-likely-than-not recognition threshold and determines the measurement of uncertain tax positions considering the amounts and probabilities of the outcomes that could be realized upon the ultimate settlement with taxing authorities. As of December 31, 2011, the Society has no uncertain tax positions that qualify for either recognition or disclosure in the financial statements.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Identifier>Part XI, Line 8 - Other Adjustments:</Identifier>
        <Explanation>Loss on books not listed on Form 990 -16,218.</Explanation>
      </Form990ScheduleDPartXIV>
      <Form990ScheduleDPartXIV>
        <Explanation>Schedule D, Part XI, line 8: $(16,218) Loss on books not listed on Form 990 Schedule D, Part XII, line 2d: $(16,218) Loss on books not listed on Form 990</Explanation>
      </Form990ScheduleDPartXIV>
    </IRS990ScheduleD>
    <IRS990ScheduleI documentId="RetDoc1041900001">
      <RecordsMaintained>1</RecordsMaintained>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>Duxbury Bay Maritime School</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PO Box 263 A</AddressLine1>
          <City>Duxbury</City>
          <State>MA</State>
          <ZIPCode>02331</ZIPCode>
        </AddressUS>
        <EINOfRecipient>043348183</EINOfRecipient>
        <IRCSection>501(c)(3)</IRCSection>
        <AmountOfCashGrant>5000</AmountOfCashGrant>
        <PurposeOfGrant>To support the Maritime Adventures program.</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>Massachusetts Maritime Academy</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>101 Academy Drive</AddressLine1>
          <City>Buzzards Bay</City>
          <State>MA</State>
          <ZIPCode>02532</ZIPCode>
        </AddressUS>
        <EINOfRecipient>237025807</EINOfRecipient>
        <IRCSection>501(c)(3)</IRCSection>
        <AmountOfCashGrant>25000</AmountOfCashGrant>
        <PurposeOfGrant>Upgrade navigation lab on T.S. Kennedy</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>Maine Maritime Academy</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PO Box C-3</AddressLine1>
          <City>Castine</City>
          <State>ME</State>
          <ZIPCode>04420</ZIPCode>
        </AddressUS>
        <EINOfRecipient>016000724</EINOfRecipient>
        <IRCSection>501(c)(3)</IRCSection>
        <AmountOfCashGrant>25000</AmountOfCashGrant>
        <PurposeOfGrant>Upgrade liquid cargo simulator</PurposeOfGrant>
      </RecipientTable>
      <RecipientTable>
        <RecipientNameBusiness>
          <BusinessNameLine1>USS Massachusetts Memorial Committee Inc</BusinessNameLine1>
        </RecipientNameBusiness>
        <AddressUS>
          <AddressLine1>PO Box 111</AddressLine1>
          <City>Fall River</City>
          <State>MA</State>
          <ZIPCode>027220111</ZIPCode>
        </AddressUS>
        <EINOfRecipient>042377049</EINOfRecipient>
        <IRCSection>501(c)(3)</IRCSection>
        <AmountOfCashGrant>5000</AmountOfCashGrant>
        <PurposeOfGrant>Battleship Cove Community Boating program.</PurposeOfGrant>
      </RecipientTable>
      <TotalNbrOf501C3AndGovtGrants>4</TotalNbrOf501C3AndGovtGrants>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>Scholarships for students attending Massachusetts Maritime Academy associated with the education &amp; preservation of the coast.</TypeOfGrant>
        <NumberOfRecipients>6</NumberOfRecipients>
        <AmountOfCashGrant>30000</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>Scholarships for students attending Maine Maritime Academy associated with the education &amp; preservation of the coast.</TypeOfGrant>
        <NumberOfRecipients>11</NumberOfRecipients>
        <AmountOfCashGrant>30000</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>Sea term scholarship for license track cadets in the name of Thomas E. Burke.</TypeOfGrant>
        <NumberOfRecipients>1</NumberOfRecipients>
        <AmountOfCashGrant>5000</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIII>
        <TypeOfGrant>Relief grant funds provided to survivors of members who are in need of financial assistance.</TypeOfGrant>
        <NumberOfRecipients>5</NumberOfRecipients>
        <AmountOfCashGrant>36000</AmountOfCashGrant>
      </Form990ScheduleIPartIII>
      <Form990ScheduleIPartIV>
        <Identifier>Procedure for Monitoring Grants in the U.S.:</Identifier>
        <ReturnReference>Part I, Line 2:</ReturnReference>
        <Explanation>Schedule I, Part I, Line 2: Grantees are encouranged to provide the Society with summaries of how the grantee organization utilized the funds received from the Boston Marine Society and to update the Society on the successes of the programs that received funding.</Explanation>
      </Form990ScheduleIPartIV>
    </IRS990ScheduleI>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 6</ReturnReference>
        <Explanation>The organization has a body of membership that have submitted applications for their membership to the Board of Trustees, who review and approve memberships in accordance with the Societies by-laws.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 7a</ReturnReference>
        <Explanation>The membership of the Society elect the 15 members of the Board of Trustees at the Society's annual meeting, which is held each year in November.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section A, line 7b</ReturnReference>
        <Explanation>Decisions of the Board of Trustees are subject to approval of the members.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 11</ReturnReference>
        <Explanation>The Board of Trustees reviews Form 990 and it is approved by the audit and finance committee.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section B, line 12c</ReturnReference>
        <Explanation>Conflicts of interest are documented first and later discussed in Board of Directors meeting.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <ReturnReference>Form 990, Part VI, Section C, line 19</ReturnReference>
        <Explanation>The Governing Documents, conflict of interest policy and financial statements are available to the public upon request at the Society's office. Also, the financial statements are on file with the Massachusetts Attorney General's office, Public Charities Division as the financial statements are required to be submitted annually with the Massachusetts Form PC.</Explanation>
      </GeneralExplanation>
      <GeneralExplanation>
        <Identifier>Changes in Net Assets or Fund Balances:</Identifier>
        <ReturnReference>Form 990, Part XI, line 5:</ReturnReference>
        <Explanation>Net unrealized losses on investments: -2,263,063. Loss on books not listed on Form 990 -16,218. Total to Form 990, Part XI, Line 5: -2,279,281.</Explanation>
      </GeneralExplanation>
    </IRS990ScheduleO>
  </ReturnData>
</Return>