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                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/PrepaidCharterRevenueDetail2Details" id="ELRID_DisclosurePrepaidCharterRevenueDetail2Details">
                <link:definition>040072 - Disclosure - Prepaid charter revenue, detail 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/LongTermDebtDetailsDetails" id="ELRID_LongTermDebtDetailsDetails">
                <link:definition>040080 - Disclosure - Long-Term Debt, details (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/LongTermDebtTextuals1Details" id="ELRID_LongTermDebtTextuals1Details">
                <link:definition>040081 - Disclosure - Long-Term Debt, textuals 1 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/LongTermDebtTextualsDetails" id="ELRID_LongTermDebtTextualsDetails">
                <link:definition>040082 - Disclosure - Long-Term Debt, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/UnrelatedPartyFinancingTextuals2Details" id="ELRID_UnrelatedPartyFinancingTextuals2Details">
                <link:definition>040083 - Disclosure - Unrelated Party Financing, textuals 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/BankAndOtherDebtCurrentDetail2Details" id="ELRID_BankAndOtherDebtCurrentDetail2Details">
                <link:definition>040090 - Disclosure - Bank and Other Debt, Current, detail 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/DeferredRevenueCurrentDetailDetails" id="ELRID_DeferredRevenueCurrentDetailDetails">
                <link:definition>040100 - Disclosure - Deferred Revenue, current, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/CommitmentsAndContingenciesTextualsDetails" id="ELRID_CommitmentsAndContingenciesTextualsDetails">
                <link:definition>040110 - Disclosure - Commitments and Contingencies, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/CommitmentsAndContingenciesTextuals2Details" id="ELRID_CommitmentsAndContingenciesTextuals2Details">
                <link:definition>040120 - Disclosure - Commitments and Contingencies, textuals 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/ChangesInCapitalAccountsTextualsDetails" id="ELRID_ChangesInCapitalAccountsTextualsDetails">
                <link:definition>040130 - Disclosure - Changes in Capital Accounts, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/ChangesInCapitalAccountsDetailDetails" id="ELRID_DisclosureChangesInCapitalAccountsDetailDetails">
                <link:definition>040132 - Disclosure - Changes in Capital Accounts, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/ChangesInCapitalAccountsTextuals2Details" id="ELRID_DisclosureChangesInCapitalAccountsTextuals2Details">
                <link:definition>040133 - Disclosure - Changes in Capital Accounts, textuals 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/VoyageAndVesselOperatingExpensesDetailDetails" id="ELRID_VoyageAndVesselOperatingExpensesDetailDetails">
                <link:definition>040140 - Disclosure - Voyage and vessel operating expenses, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/EarningsLossPerShareTextualsDetails" id="ELRID_EarningsLossPerShareTextualsDetails">
                <link:definition>040160 - Disclosure - Earnings / (Loss) per share, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/EarningsLossPerShareDetailDetails" id="ELRID_EarningsLossPerShareDetailDetails">
                <link:definition>040161 - Disclosure - Earnings / (Loss) per Share, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/IncomeTaxesTextualsDetails" id="ELRID_IncomeTaxesTextualsDetails">
                <link:definition>040170 - Disclosure - Income Taxes, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/SubsequentEventsTextualsDetails" id="ELRID_SubsequentEventsTextualsDetails">
                <link:definition>040180 - Disclosure - Subsequent events, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/InterestAndFinanceCostsDetailDetails" id="ELRID_InterestAndFinanceCostsDetailDetails">
                <link:definition>040150 - Disclosure - Interest and Finance Costs, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/InterestAndFinanceCosts" id="ELRID_InterestAndFinanceCosts">
                <link:definition>010109 - Disclosure - Interest and Finance Costs</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/InterestAndFinanceCostsTables" id="ELRID_InterestAndFinanceCostsTables">
                <link:definition>030093 - Disclosure - Interest and Finance Costs (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/IncomeTaxes" id="ELRID_IncomeTaxes">
                <link:definition>010120 - Disclosure - Income Taxes</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/GeneralInformationTextuals2Details" id="ELRID_GeneralInformationTextuals2Details">
                <link:definition>040003 - Disclosure - General information, textuals 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/AdvancesForVesselAcquisitionsAndOtherVesselsCostsTextualsDetails" id="ELRID_AdvancesForVesselAcquisitionsAndOtherVesselsCostsTextualsDetails">
                <link:definition>040036 - Disclosure - Advances for Vessel Acquisitions and Other Vessels' Costs, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/AdvancesForVesselAcquisitionsAndOtherVesselsCostsDetailsDetails" id="ELRID_AdvancesForVesselAcquisitionsAndOtherVesselsCostsDetailsDetails">
                <link:definition>040037 - Disclosure - Advances for Vessel Acquisitions and Other Vessels' Costs, details (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/LongTermDebtDetails2Details" id="ELRID_LongTermDebtDetails2Details">
                <link:definition>040084 - Disclosure - Long-Term Debt, details 2 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/SegmentReportingTextualsDetails" id="ELRID_SegmentReportingTextualsDetails">
                <link:definition>040172 - Disclosure - Segment Reporting, textuals (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/SegmentReportingDetailsDetails" id="ELRID_SegmentReportingDetailsDetails">
                <link:definition>040173 - Disclosure - Segment Reporting, details (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesTextuals3Details" id="ELRID_RecentAccountingPronouncementsAndSignificantAccountingPoliciesTextuals3Details">
                <link:definition>040012 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, textuals 3 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/TransactionsWithRelatedPartiesTextuals3Details" id="ELRID_TransactionsWithRelatedPartiesTextuals3Details">
                <link:definition>040034 - Disclosure - Transactions with related parties, textuals 3 (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/CommitmentsAndContingenciesDetailDetails" id="ELRID_CommitmentsAndContingenciesDetailDetails">
                <link:definition>040125 - Disclosure - Commitments and Contingencies, detail (Details)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/CommitmentsAndContingenciesTables" id="ELRID_CommitmentsAndContingenciesTables">
                <link:definition>030065 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
            <link:roleType roleURI="http://m.pshipping.com/role/SegmentReportingTables" id="ELRID_SegmentReportingTables">
                <link:definition>030096 - Disclosure - Segment Reporting (Tables)</link:definition>
                <link:usedOn>link:presentationLink</link:usedOn>
                <link:usedOn>link:calculationLink</link:usedOn>
                <link:usedOn>link:definitionLink</link:usedOn>
            </link:roleType>
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    <import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
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    <import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" />
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    <element name="TotalFixedAssets" id="pshg_TotalFixedAssets" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="PropertyAndEquipmentNet" id="pshg_PropertyAndEquipmentNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="LongTermDebtDueToRelatedPartiesNoncurrent" id="pshg_LongTermDebtDueToRelatedPartiesNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="LongTermDebtDueToRelatedPartiesCurrent" id="pshg_LongTermDebtDueToRelatedPartiesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
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    <element name="ProceedsFromSaleOfPropertyPlantAndEquipmentNet" id="pshg_ProceedsFromSaleOfPropertyPlantAndEquipmentNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
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    <element name="AltairTravelAgencySaMember" id="pshg_AltairTravelAgencySaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SteamshipShipbrokingEnterprisesIncMember" id="pshg_SteamshipShipbrokingEnterprisesIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="AddiewellLTDMember" id="pshg_AddiewellLTDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EarningsLossPerShareBasicMember" id="pshg_EarningsLossPerShareBasicMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EarningsLossPerShareDilutedMember" id="pshg_EarningsLossPerShareDilutedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LikiepShippingCompanyIncMember" id="pshg_LikiepShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="OranginaIncMember" id="pshg_OranginaIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RongerikShippingCompanyIncMember" id="pshg_RongerikShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DudShippingCompanyIncMember" id="pshg_DudShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MagoShippingCompanyIncMember" id="pshg_MagoShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ElukShippingCompanyIncMember" id="pshg_ElukShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="OrukShippingCompanyIncMember" id="pshg_OrukShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DelapShippingCompanyIncMember" id="pshg_DelapShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="JaborShippingCompanyIncMember" id="pshg_JaborShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MeckShippingCompanyIncMember" id="pshg_MeckShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LangorShippingCompanyIncMember" id="pshg_LangorShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="KapaShippingCompanyIncMember" id="pshg_KapaShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="UtirikShippingCompanyIncMember" id="pshg_UtirikShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerBMember" id="pshg_MajorCustomerBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerFMember" id="pshg_MajorCustomerFMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerCMember" id="pshg_MajorCustomerCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerMember" id="pshg_MajorCustomerMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerDMember" id="pshg_MajorCustomerDMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MajorCustomerEMember" id="pshg_MajorCustomerEMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RegisteredDirectOfferingMember" id="pshg_RegisteredDirectOfferingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SeriesB2PreferredStockMember" id="pshg_SeriesB2PreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RbsTermLoanMember" id="pshg_RbsTermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="FirstTwelveMonthsMember" id="pshg_FirstTwelveMonthsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ThirteenthToFifteenthMonthMember" id="pshg_ThirteenthToFifteenthMonthMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LastThreeMonthsMember" id="pshg_LastThreeMonthsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SeriesB1AndSeriesB2PreferredStockMember" id="pshg_SeriesB1AndSeriesB2PreferredStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="KalaniMember" id="pshg_KalaniMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CertainMinimumTradingVolumeOfCommonSharesIsMetMember" id="pshg_CertainMinimumTradingVolumeOfCommonSharesIsMetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LoansPayableAmendmentAgreementMember" id="pshg_LoansPayableAmendmentAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EquityIncentivePlan2015AmendmentMember" id="pshg_EquityIncentivePlan2015AmendmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RevisedMarginMember" id="pshg_RevisedMarginMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MarginUntilMaturityMember" id="pshg_MarginUntilMaturityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DocumentAndEntityInformationAbstract" id="pshg_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RestrictedStockIssuedPerShare" id="pshg_RestrictedStockIssuedPerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="AdvancesForVesselsUnderConstructionAndAcquisitionsAndOtherVesselCostsAbstract" id="pshg_AdvancesForVesselsUnderConstructionAndAcquisitionsAndOtherVesselCostsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="AdvancesForVesselsUnderConstructionAndAcquisitionsAndOtherVesselCostsTextBlock" id="pshg_AdvancesForVesselsUnderConstructionAndAcquisitionsAndOtherVesselCostsTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="PropertyAndEquipmentAbstract" id="pshg_PropertyAndEquipmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PropertyAndEquipmentTextBlock" id="pshg_PropertyAndEquipmentTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="VoyageAndVesselOperatingExpensesAbstract" id="pshg_VoyageAndVesselOperatingExpensesAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VoyageAndVesselOperatingExpensesTextBlock" id="pshg_VoyageAndVesselOperatingExpensesTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OfficePropertyAndEquipmentPolicyTextBlock" id="pshg_OfficePropertyAndEquipmentPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AssetsHeldForSalePolicyTextBlock" id="pshg_AssetsHeldForSalePolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="GoingConcernPolicyTextBlock" id="pshg_GoingConcernPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AdvancesForPropertyPlantAndEquipmentAbstract" id="pshg_AdvancesForPropertyPlantAndEquipmentAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="AdvancesForPropertyPlantAndEquipmentTableTextBlock" id="pshg_AdvancesForPropertyPlantAndEquipmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfPropertyAndEquipmentTableTextBlock" id="pshg_ScheduleOfPropertyAndEquipmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfPrepaidCharterRevenueAnalysisTableTextBlock" id="pshg_ScheduleOfPrepaidCharterRevenueAnalysisTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfVoyageAndVesselOperatingExpensesAnalysisTableTextBlock" id="pshg_ScheduleOfVoyageAndVesselOperatingExpensesAnalysisTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="CapacityBySubsidiaryAndFeesLineItems" id="pshg_CapacityBySubsidiaryAndFeesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CommissionsPercentageOnCharters" id="pshg_CommissionsPercentageOnCharters" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="MonthlyManagementFeeOperatingVessels" id="pshg_MonthlyManagementFeeOperatingVessels" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="MonthlyAdministrativeFee" id="pshg_MonthlyAdministrativeFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="EstimatedResidualScrapValuePerLightweightTon" id="pshg_EstimatedResidualScrapValuePerLightweightTon" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="EffectOfChangeInAccountingEstimate" id="pshg_EffectOfChangeInAccountingEstimate" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="PerShareEffectOfChangeInAccountingEstimate" id="pshg_PerShareEffectOfChangeInAccountingEstimate" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="TimePeriodConsidered" id="pshg_TimePeriodConsidered" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AssumedInflationPercentage" id="pshg_AssumedInflationPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AssumedVesselUtilization" id="pshg_AssumedVesselUtilization" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="OffHirePercentage" id="pshg_OffHirePercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="VesselsInPropertyPlantAndEquipmentAxis" id="pshg_VesselsInPropertyPlantAndEquipmentAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VesselsInPropertyPlantAndEquipmentDomain" id="pshg_VesselsInPropertyPlantAndEquipmentDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ReclassificationOfLongTermDebt" id="pshg_ReclassificationOfLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="AnnualBrokerageFee" id="pshg_AnnualBrokerageFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="MonthlyBrokerageFee" id="pshg_MonthlyBrokerageFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="AgreementDurationInMonths" id="pshg_AgreementDurationInMonths" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="BonusPaid" id="pshg_BonusPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="NumberOfVesselsCollateralForDebt" id="pshg_NumberOfVesselsCollateralForDebt" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="TransactionsWithRelatedPartiesDetail2DetailsAbstract" id="pshg_TransactionsWithRelatedPartiesDetail2DetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VesselsInPropertyPlantAndEquipmentTable" id="pshg_VesselsInPropertyPlantAndEquipmentTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ContractPriceOfVesselsAcquired" id="pshg_ContractPriceOfVesselsAcquired" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="CompensationForVesselFromSellers" id="pshg_CompensationForVesselFromSellers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="NumberOfVesselsAcquired" id="pshg_NumberOfVesselsAcquired" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="NumberOfVesselsSoldOrToBeSold" id="pshg_NumberOfVesselsSoldOrToBeSold" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="CostsCapitalisedInVessels" id="pshg_CostsCapitalisedInVessels" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="NumberOfVesselsImpaired" id="pshg_NumberOfVesselsImpaired" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="VesselsAndVesselsHeldForSaleTextuals2DetailsAbstract" id="pshg_VesselsAndVesselsHeldForSaleTextuals2DetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SaleOfStockMaximumOfferingAmount" id="pshg_SaleOfStockMaximumOfferingAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="PropertyAndEquipmentGross" id="pshg_PropertyAndEquipmentGross" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="AccumulatedDepreciationAndAmortizationPropertyAndEquipment" id="pshg_AccumulatedDepreciationAndAmortizationPropertyAndEquipment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="PropertyAndEquipmentNetByTypeAbstract" id="pshg_PropertyAndEquipmentNetByTypeAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfJointOwnersOfPropertyTable" id="pshg_ScheduleOfJointOwnersOfPropertyTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfJointOwnersOfPropertyAxis" id="pshg_ScheduleOfJointOwnersOfPropertyAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfJointOwnersOfPropertyDomain" id="pshg_ScheduleOfJointOwnersOfPropertyDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PlotOfLandPurchasePrice" id="pshg_PlotOfLandPurchasePrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="MovementInIntangibleAssetsRollForward" id="pshg_MovementInIntangibleAssetsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="WriteOffOfFullyAmortizedAssetCost" id="pshg_WriteOffOfFullyAmortizedAssetCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="MovementInAccumulatedAmortizationOfFiniteLivedIntangibleAssetsRollForward" id="pshg_MovementInAccumulatedAmortizationOfFiniteLivedIntangibleAssetsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="WriteOffOfFullyAmortizedAssetAccumulatedAmortization" id="pshg_WriteOffOfFullyAmortizedAssetAccumulatedAmortization" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="PrepaidCharterRevenueNetAbstract" id="pshg_PrepaidCharterRevenueNetAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BankAndOtherDebtDetailsDetailsAbstract" id="pshg_BankAndOtherDebtDetailsDetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DebtInstrumentTranchesAxis" id="pshg_DebtInstrumentTranchesAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DebtInstrumentTranchesDomain" id="pshg_DebtInstrumentTranchesDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DebtInstrumentNumberOfPeriodicPayment" id="pshg_DebtInstrumentNumberOfPeriodicPayment" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="FinalDebtPrincipalPayment" id="pshg_FinalDebtPrincipalPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="DebtInstrumentCommitmentFeesPercentage" id="pshg_DebtInstrumentCommitmentFeesPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="PercentageOfBorrowingsToMarketValue" id="pshg_PercentageOfBorrowingsToMarketValue" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="DebtInstrumentNumberOfInstallments" id="pshg_DebtInstrumentNumberOfInstallments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="DebtIssuanceCosts6" id="pshg_DebtIssuanceCosts6" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="BorrowerMinimumLiquidityPercentage" id="pshg_BorrowerMinimumLiquidityPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="BorrowerMinimumLiquidity" id="pshg_BorrowerMinimumLiquidity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="DebtDefaultAcceleratedPaymentWaived" id="pshg_DebtDefaultAcceleratedPaymentWaived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="SecurityCoverRatio" id="pshg_SecurityCoverRatio" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="BorrowerMinimumLiquidityPerVessel" id="pshg_BorrowerMinimumLiquidityPerVessel" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="DebtInstrumentPrepaymentAmount" id="pshg_DebtInstrumentPrepaymentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="MinimumSecurityCovenant" id="pshg_MinimumSecurityCovenant" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="ReceiptOfNasdaqNoticeAxis" id="pshg_ReceiptOfNasdaqNoticeAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ReceiptOfNasdaqNoticeDomain" id="pshg_ReceiptOfNasdaqNoticeDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MinimumBidPrice" id="pshg_MinimumBidPrice" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="ClosingBidPriceThresholdConsecutiveTradingDays" id="pshg_ClosingBidPriceThresholdConsecutiveTradingDays" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="Quotedmarketvalue" id="pshg_Quotedmarketvalue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="GracePeriodToRegainCompliance" id="pshg_GracePeriodToRegainCompliance" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="NumberOfReverseStockSplits" id="pshg_NumberOfReverseStockSplits" type="xbrli:positiveIntegerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ChangesInCapitalAccountsTextuals2DetailsAbstract" id="pshg_ChangesInCapitalAccountsTextuals2DetailsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="CommonStockOfferGrossProceeds" id="pshg_CommonStockOfferGrossProceeds" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="AnnualDividendPerShareRestriction" id="pshg_AnnualDividendPerShareRestriction" type="num:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="EnvironmentalCompliancePlan" id="pshg_EnvironmentalCompliancePlan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="LayUpExpenses" id="pshg_LayUpExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="EffectsOfIncrementalSharesTable" id="pshg_EffectsOfIncrementalSharesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EffectsOfIncrementalSharesAxis" id="pshg_EffectsOfIncrementalSharesAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="EffectsOfIncrementalSharesDomain" id="pshg_EffectsOfIncrementalSharesDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MinimumStockOwnershipPercentageForTaxExemption" id="pshg_MinimumStockOwnershipPercentageForTaxExemption" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="MinimumVoteAndValuePercentageOfRegularlyTradedStock" id="pshg_MinimumVoteAndValuePercentageOfRegularlyTradedStock" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="SignificantShareholderPercentage" id="pshg_SignificantShareholderPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="PercentageOfGrossIncomeSubjectToTax" id="pshg_PercentageOfGrossIncomeSubjectToTax" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="UnrecognisedTaxExpenseForTaxExemptEntity" id="pshg_UnrecognisedTaxExpenseForTaxExemptEntity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="TaxRateOnUsSourceShippingIncome" id="pshg_TaxRateOnUsSourceShippingIncome" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="GrossContractPriceOfVesselToBeDisposed" id="pshg_GrossContractPriceOfVesselToBeDisposed" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="PercentageOfAdvanceForVesselToDisposed" id="pshg_PercentageOfAdvanceForVesselToDisposed" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="DepositAmountCollectedForSaleOfVessel" id="pshg_DepositAmountCollectedForSaleOfVessel" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="BonusToBePaidNextFiscalYear" id="pshg_BonusToBePaidNextFiscalYear" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="SaleOfStockOfferingPeriod" id="pshg_SaleOfStockOfferingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="TimeCharterRevenuesTotal" id="pshg_TimeCharterRevenuesTotal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="DoukatomemberMember" id="pshg_DoukatomemberMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DebtPayableRelatedPartiesClassifiedCurrent" id="pshg_DebtPayableRelatedPartiesClassifiedCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="ContainerVesselsMember" id="pshg_ContainerVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VotingRightsPreferredStock" id="pshg_VotingRightsPreferredStock" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ExecutiveOfficersAndNonExecutiveDirectorsMember" id="pshg_ExecutiveOfficersAndNonExecutiveDirectorsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="InterestAndFinanceCostsAbstract" id="pshg_InterestAndFinanceCostsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="InterestAndFinanceCostsTextBlock" id="pshg_InterestAndFinanceCostsTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ScheduleOfInterestAndFinanceCostsTableTextBlock" id="pshg_ScheduleOfInterestAndFinanceCostsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ReceiptOfNasdaqNoticeMember" id="pshg_ReceiptOfNasdaqNoticeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RevenueRecognitionAndRelatedExpensesPolicyTextBlock" id="pshg_RevenueRecognitionAndRelatedExpensesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="TaburaoShippingCompanyIncMember" id="pshg_TaburaoShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TarawaShippingCompanyIncMember" id="pshg_TarawaShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="ContainersSegmentMember" id="pshg_ContainersSegmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TankersSegmentMember" id="pshg_TankersSegmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BlueMoonAndBrioletteVesselsMember" id="pshg_BlueMoonAndBrioletteVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="VesselDeliveryDate" id="pshg_VesselDeliveryDate" type="xbrli:dateItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="BlueMoonVesselMember" id="pshg_BlueMoonVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BrioletteVesselMember" id="pshg_BrioletteVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RongelapShippingCompanyIncMember" id="pshg_RongelapShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PFosTankerVesselMember" id="pshg_PFosTankerVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PuconVesselMember" id="pshg_PuconVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PaminaAndRotterdamVesselsMember" id="pshg_PaminaAndRotterdamVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PaminaAndPuconContainerVesselsMember" id="pshg_PaminaAndPuconContainerVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MarchGreatNewJerseySagittaCentaurusPueloHamburgContainerVesselsMember" id="pshg_MarchGreatNewJerseySagittaCentaurusPueloHamburgContainerVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NordeaMember" id="pshg_NordeaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="IncreaseDecreaseInDeferredDryDockCosts" id="pshg_IncreaseDecreaseInDeferredDryDockCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="DateExpectedDelivery" id="pshg_DateExpectedDelivery" type="xbrli:dateItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="RotterdamContainerVesselMember" id="pshg_RotterdamContainerVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MaerskTankersMember" id="pshg_MaerskTankersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TankerVesselsMember" id="pshg_TankerVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TimeChartersMember" id="pshg_TimeChartersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SpotChartersMember" id="pshg_SpotChartersMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TaburaoTarawaRongelapShippingCompanyIncMember" id="pshg_TaburaoTarawaRongelapShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="DianaWilhelmsenManagementLimitedMember" id="pshg_DianaWilhelmsenManagementLimitedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="TaburaoTarawaShippingCompanyIncMember" id="pshg_TaburaoTarawaShippingCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="RongelapShippingCompanyMember" id="pshg_RongelapShippingCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NordeaBankMember" id="pshg_NordeaBankMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BlueMoonTrancheMember" id="pshg_BlueMoonTrancheMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="BrioletteTrancheMember" id="pshg_BrioletteTrancheMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NumberOfSubsidiariesEnteredIntoLoanAgreement" id="pshg_NumberOfSubsidiariesEnteredIntoLoanAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="ShareRepurchaseProgramMember" id="pshg_ShareRepurchaseProgramMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PerTankerAcquiredMember" id="pshg_PerTankerAcquiredMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="NordeaAddiewellRBSMember" id="pshg_NordeaAddiewellRBSMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="LeaseRightOfUseRecognition" id="pshg_LeaseRightOfUseRecognition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="LeaseLiabilitiesRecognition" id="pshg_LeaseLiabilitiesRecognition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="EntityIncorporationCountryName" id="pshg_EntityIncorporationCountryName" type="xbrli:normalizedStringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="ReclassificationOfCompensationCostOfIssuedRestrictedStockAwards" id="pshg_ReclassificationOfCompensationCostOfIssuedRestrictedStockAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="DeferredChargesNetMember" id="pshg_DeferredChargesNetMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PKikumaTankerVesselMember" id="pshg_PKikumaTankerVesselMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="SecondAmendedAndRestatedLoanAgreementMember" id="pshg_SecondAmendedAndRestatedLoanAgreementMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="PercentageOfAdvanceForVesselToBought" id="pshg_PercentageOfAdvanceForVesselToBought" type="num:percentItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
    <element name="ForeignCurrencyTransactionOperatingGainLossBeforeTax" id="pshg_ForeignCurrencyTransactionOperatingGainLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
    <element name="AssetImpairmentChargesIncludingUnamortizedDrydockingCosts" id="pshg_AssetImpairmentChargesIncludingUnamortizedDrydockingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
    <element name="AdvancesForVesselAcquisitionsAndOtherVesselsCosts" id="pshg_AdvancesForVesselAcquisitionsAndOtherVesselsCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="instant" />
    <element name="EvaluationOfPurchaseTransactionsPolicyTextBlock" id="pshg_EvaluationOfPurchaseTransactionsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
    <element name="TankerAndContainerVesselsMember" id="pshg_TankerAndContainerVesselsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
    <element name="MinimumRevenuesFromNoncancellableSpotContract" id="pshg_MinimumRevenuesFromNoncancellableSpotContract" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
    <element name="MonthlyRentAsPeragreement" id="pshg_MonthlyRentAsPeragreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
</schema>
