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  <xs:element name="NumberOfVesselsWithRightButNotObligationToPurchase" id="op_NumberOfVesselsWithRightButNotObligationToPurchase" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
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  <xs:element name="AdditionalPaidInCapitalCommonStockPerShare" id="op_AdditionalPaidInCapitalCommonStockPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="NumberOfIdentifiedVessels" id="op_NumberOfIdentifiedVessels" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
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  <xs:element name="PreferredShareFairValue" id="op_PreferredShareFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="NumberOfDrybulkCarriersWithRightOfFirstRefusal" id="op_NumberOfDrybulkCarriersWithRightOfFirstRefusal" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
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  <xs:element name="CommonSharesDistributed" id="op_CommonSharesDistributed" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
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  <xs:element name="MinimumPeriodVesselIsLaidUpAndNotAvailableForEmployment" id="op_MinimumPeriodVesselIsLaidUpAndNotAvailableForEmployment" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodFairValue" id="op_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedInPeriodFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xs:element name="ExecutiveManagementAndNonExecutiveDirectorsMember" id="op_ExecutiveManagementAndNonExecutiveDirectorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="InsuranceClaimRecoveries" id="op_InsuranceClaimRecoveries" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
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  <xs:element name="UnrecordedUnconditionalPurchaseObligationPaymentInstallmentAmount" id="op_UnrecordedUnconditionalPurchaseObligationPaymentInstallmentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="NumberOfChemicalTankersUnderConstruction" id="op_NumberOfChemicalTankersUnderConstruction" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="VariableInterestEntityNetTransactionCosts" id="op_VariableInterestEntityNetTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="NumberOfPaymentInstallments" id="op_NumberOfPaymentInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="NumberOfPaymentInstallmentsRemaining" id="op_NumberOfPaymentInstallmentsRemaining" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="RFSeaInfrastructureIIASMember" id="op_RFSeaInfrastructureIIASMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="BeneficialOwnershipThresholdPercentage" id="op_BeneficialOwnershipThresholdPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DividendsPreferredStockCashExcludingAccrualsInPriorPeriods" id="op_DividendsPreferredStockCashExcludingAccrualsInPriorPeriods" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
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  <xs:element name="HistoricalBlendedAverageYearForCalculatingUndiscountedProjectedNetOperatingCashFlows" id="op_HistoricalBlendedAverageYearForCalculatingUndiscountedProjectedNetOperatingCashFlows" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="AggregateCumulativeTradingVolumeShares" id="op_AggregateCumulativeTradingVolumeShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="WarrantsAndRightsOutstandingNumberOfSecuritiesCalledByWarrantOrRightCashlessBasis" id="op_WarrantsAndRightsOutstandingNumberOfSecuritiesCalledByWarrantOrRightCashlessBasis" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="ClassOfWarrantOrRightWarrantsIssued" id="op_ClassOfWarrantOrRightWarrantsIssued" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="MonthlyPercentageFeeOnHireAndOnFreightOfVesselGrossIncome" id="op_MonthlyPercentageFeeOnHireAndOnFreightOfVesselGrossIncome" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
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  <xs:element name="ManagementServicesMember" id="op_ManagementServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="FinancialInstrumentsLineItems" id="op_FinancialInstrumentsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
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  <xs:element name="DistinguishingLiabilitiesFromEquityPolicyTextBlock" id="op_DistinguishingLiabilitiesFromEquityPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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  <xs:element name="StockIssuedDuringPeriodSharesNewIssuesAtPrimaryOffering" id="op_StockIssuedDuringPeriodSharesNewIssuesAtPrimaryOffering" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
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</xs:schema>
