<?xml version="1.0" encoding="us-ascii"?>
<!--Generated by EDGARfilings PROfile 8.0.0.0 Broadridge-->
<xs:schema targetNamespace="http://pshipping.com./20211231" elementFormDefault="qualified" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:pshg="http://pshipping.com./20211231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:us-types="http://fasb.org/us-types/2021-01-31" xmlns:srt-types="http://fasb.org/srt-types/2021-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2021q4" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21">
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xlink:type="simple" xlink:href="pshg-20211231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pshg-20211231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pshg-20211231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:linkbaseRef xlink:type="simple" xlink:href="pshg-20211231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" />
      <link:roleType roleURI="http://pshipping.com./role/DocumentAndEntityInformation" id="DocumentAndEntityInformation">
        <link:definition>000100 - Document - Document and Entity Information</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://pshipping.com./role/ConsolidatedBalanceSheets" id="ConsolidatedBalanceSheets">
        <link:definition>010000 - Statement - Consolidated Balance Sheets</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://pshipping.com./role/ConsolidatedBalanceSheetsParenthetical" id="ConsolidatedBalanceSheetsParenthetical">
        <!--Parent Role: Consolidated Balance Sheets-->
        <link:definition>010100 - Statement - Consolidated Balance Sheets (Parenthetical)</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://pshipping.com./role/ConsolidatedStatementsOfOperations" id="ConsolidatedStatementsOfOperations">
        <link:definition>020000 - Statement - Consolidated Statements of Operations</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://pshipping.com./role/ConsolidatedStatementsOfComprehensiveIncomeLoss" id="ConsolidatedStatementsOfComprehensiveIncomeLoss">
        <link:definition>030000 - Statement - Consolidated Statements of Comprehensive Income / (Loss)</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://pshipping.com./role/ConsolidatedStatementsOfStockholdersEquity" id="ConsolidatedStatementsOfStockholdersEquity">
        <link:definition>040000 - Statement - Consolidated Statements of Stockholders' Equity</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://pshipping.com./role/ConsolidatedStatementsOfStockholdersEquityParenthetical" id="ConsolidatedStatementsOfStockholdersEquityParenthetical">
        <!--Parent Role: Consolidated Statements of Stockholders' Equity-->
        <link:definition>040100 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)</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://pshipping.com./role/ConsolidatedStatementsOfCashFlowsContinuingAndDiscontinuedOperations" id="ConsolidatedStatementsOfCashFlowsContinuingAndDiscontinuedOperations">
        <link:definition>050000 - Statement - Consolidated Statements of Cash Flows (continuing and discontinued operations)</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://pshipping.com./role/GeneralInformation" id="GeneralInformation">
        <link:definition>060100 - Disclosure - General Information</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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPolicies" id="RecentAccountingPronouncementsAndSignificantAccountingPolicies">
        <link:definition>060200 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies</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://pshipping.com./role/DiscontinuedOperations" id="DiscontinuedOperations">
        <link:definition>060300 - Disclosure - Discontinued Operations</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://pshipping.com./role/RevenueAccountsReceivableAndProvisionForCreditLosses" id="RevenueAccountsReceivableAndProvisionForCreditLosses">
        <link:definition>060400 - Disclosure - Revenue, Accounts Receivable and Provision for Credit Losses</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://pshipping.com./role/TransactionsWithRelatedParties" id="TransactionsWithRelatedParties">
        <link:definition>060500 - Disclosure - Transactions with Related Parties</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://pshipping.com./role/VesselsNet" id="VesselsNet">
        <link:definition>060600 - Disclosure - Vessels, net</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://pshipping.com./role/PropertyAndEquipmentNet" id="PropertyAndEquipmentNet">
        <link:definition>060700 - Disclosure - Property and Equipment, net</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://pshipping.com./role/LongtermDebt" id="LongtermDebt">
        <link:definition>060800 - Disclosure - Long-Term Debt</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://pshipping.com./role/CommitmentsAndContingencies" id="CommitmentsAndContingencies">
        <link:definition>060900 - Disclosure - Commitments and Contingencies</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://pshipping.com./role/ChangesInCapitalAccounts" id="ChangesInCapitalAccounts">
        <link:definition>061000 - Disclosure - Changes in Capital Accounts</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://pshipping.com./role/InterestAndFinanceCosts" id="InterestAndFinanceCosts">
        <link:definition>061100 - 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://pshipping.com./role/EarningsLossPerShare" id="EarningsLossPerShare">
        <link:definition>061200 - Disclosure - Earnings / (Loss) per Share</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://pshipping.com./role/IncomeTaxes" id="IncomeTaxes">
        <link:definition>061300 - 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://pshipping.com./role/FinancialInstrumentsAndFairValueDisclosures" id="FinancialInstrumentsAndFairValueDisclosures">
        <link:definition>061400 - Disclosure - Financial Instruments and Fair Value Disclosures</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://pshipping.com./role/SubsequentEvents" id="SubsequentEvents">
        <link:definition>061500 - Disclosure - Subsequent Events</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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesPolicies" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesPolicies">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>070200 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies (Policies)</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://pshipping.com./role/DiscontinuedOperationsTables" id="DiscontinuedOperationsTables">
        <!--Parent Role: Discontinued Operations-->
        <link:definition>080300 - Disclosure - Discontinued Operations (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://pshipping.com./role/RevenuesAccountsReceivableAndProvisionForCreditLossesTables" id="RevenuesAccountsReceivableAndProvisionForCreditLossesTables">
        <!--Parent Role: Revenue, Accounts Receivable and Provision for Credit Losses-->
        <link:definition>080400 - Disclosure - Revenues, Accounts Receivable and Provision for Credit Losses (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://pshipping.com./role/VesselsNetTables" id="VesselsNetTables">
        <!--Parent Role: Vessels, net-->
        <link:definition>080600 - Disclosure - Vessels, net (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://pshipping.com./role/PropertyAndEquipmentNetTables" id="PropertyAndEquipmentNetTables">
        <!--Parent Role: Property and Equipment, net-->
        <link:definition>080700 - Disclosure - Property and Equipment, net (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://pshipping.com./role/LongtermDebtTables" id="LongtermDebtTables">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>080800 - Disclosure - Long-Term Debt (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://pshipping.com./role/CommitmentsAndContingenciesTables" id="CommitmentsAndContingenciesTables">
        <!--Parent Role: Commitments and Contingencies-->
        <link:definition>080900 - 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://pshipping.com./role/ChangesInCapitalAccountsTables" id="ChangesInCapitalAccountsTables">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>081000 - Disclosure - Changes in Capital Accounts (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://pshipping.com./role/InterestAndFinanceCostsTables" id="InterestAndFinanceCostsTables">
        <!--Parent Role: Interest and Finance Costs-->
        <link:definition>081100 - 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://pshipping.com./role/EarningsLossPerShareTables" id="EarningsLossPerShareTables">
        <!--Parent Role: Earnings / (Loss) per Share-->
        <link:definition>081200 - Disclosure - Earnings / (Loss) per Share (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://pshipping.com./role/GeneralInformationDetails" id="GeneralInformationDetails">
        <!--Parent Role: General Information-->
        <link:definition>090100 - Disclosure - General Information (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesVesselDepreciationDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesVesselDepreciationDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090202 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, Vessel Depreciation (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesImpairmentOfLonglivedAssetsDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesImpairmentOfLonglivedAssetsDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090204 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, Impairment of Long-Lived Assets (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesAssetsHeldForSaleDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesAssetsHeldForSaleDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090206 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, Assets Held for Sale (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesRevenuesAndVoyageExpensesDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesRevenuesAndVoyageExpensesDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090208 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, Revenues and Voyage Expenses (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesDrydockingCostsDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesDrydockingCostsDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090210 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies, Dry-Docking Costs (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://pshipping.com./role/RecentAccountingPronouncementsAndSignificantAccountingPoliciesSegmentalReportingDetails" id="RecentAccountingPronouncementsAndSignificantAccountingPoliciesSegmentalReportingDetails">
        <!--Parent Role: Recent Accounting Pronouncements and Significant Accounting Policies-->
        <link:definition>090212 - Disclosure - Recent Accounting Pronouncements and Significant Accounting Policies. Segmental Reporting (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://pshipping.com./role/DiscontinuedOperationsDetails" id="DiscontinuedOperationsDetails">
        <!--Parent Role: Discontinued Operations-->
        <link:definition>090300 - Disclosure - Discontinued Operations (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://pshipping.com./role/RevenueAccountsReceivableAndProvisionForCreditLossesRevenueAndAccountsReceivableDetails" id="RevenueAccountsReceivableAndProvisionForCreditLossesRevenueAndAccountsReceivableDetails">
        <!--Parent Role: Revenue, Accounts Receivable and Provision for Credit Losses-->
        <link:definition>090400 - Disclosure - Revenue, Accounts Receivable and Provision for Credit Losses, Revenue and Accounts Receivable (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://pshipping.com./role/RevenueAccountsReceivableAndProvisionForCreditLossesCreditLossesProvisionDetails" id="RevenueAccountsReceivableAndProvisionForCreditLossesCreditLossesProvisionDetails">
        <!--Parent Role: Revenue, Accounts Receivable and Provision for Credit Losses-->
        <link:definition>090402 - Disclosure - Revenue, Accounts Receivable and Provision for Credit Losses, Credit Losses Provision (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://pshipping.com./role/TransactionsWithRelatedPartiesDetails" id="TransactionsWithRelatedPartiesDetails">
        <!--Parent Role: Transactions with Related Parties-->
        <link:definition>090500 - Disclosure - Transactions with Related Parties (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://pshipping.com./role/VesselsNetVesselAcquisitionsAndVesselsImprovementsDetails" id="VesselsNetVesselAcquisitionsAndVesselsImprovementsDetails">
        <!--Parent Role: Vessels, net-->
        <link:definition>090600 - Disclosure - Vessels, net, Vessel Acquisitions and Vessels' Improvements (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://pshipping.com./role/VesselsNetVesselsImpairmentDetails" id="VesselsNetVesselsImpairmentDetails">
        <!--Parent Role: Vessels, net-->
        <link:definition>090602 - Disclosure - Vessels, net, Vessels' Impairment (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://pshipping.com./role/VesselsNetVesselsDisposalsDetails" id="VesselsNetVesselsDisposalsDetails">
        <!--Parent Role: Vessels, net-->
        <link:definition>090604 - Disclosure - Vessels, net, Vessels' Disposals (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://pshipping.com./role/PropertyAndEquipmentNetDetails" id="PropertyAndEquipmentNetDetails">
        <!--Parent Role: Property and Equipment, net-->
        <link:definition>090702 - Disclosure - Property and Equipment, net, (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://pshipping.com./role/LongtermDebtSummaryDetails" id="LongtermDebtSummaryDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090800 - Disclosure - Long-Term Debt, Summary (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://pshipping.com./role/LongtermDebtSecuredTermLoansDetails" id="LongtermDebtSecuredTermLoansDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090802 - Disclosure - Long-Term Debt, Secured Term Loans (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://pshipping.com./role/LongtermDebtMaturitiesOfDebtFacilitiesDetails" id="LongtermDebtMaturitiesOfDebtFacilitiesDetails">
        <!--Parent Role: Long-Term Debt-->
        <link:definition>090804 - Disclosure - Long-Term Debt, Maturities of Debt Facilities (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://pshipping.com./role/CommitmentsAndContingenciesDetails" id="CommitmentsAndContingenciesDetails">
        <!--Parent Role: Commitments and Contingencies-->
        <link:definition>090900 - Disclosure - Commitments and Contingencies (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://pshipping.com./role/CommitmentsAndContingenciesDetailsCalc01" id="CommitmentsAndContingenciesDetailsCalc01">
        <!--Parent Role: Commitments and Contingencies (Details)-->
        <link:definition>090902 - Disclosure - Commitments and Contingencies (Details) CALC 01</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://pshipping.com./role/ChangesInCapitalAccountsPreferredStockDetails" id="ChangesInCapitalAccountsPreferredStockDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091000 - Disclosure - Changes in Capital Accounts, Preferred Stock (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://pshipping.com./role/ChangesInCapitalAccountsSeriesBPreferredStockDetails" id="ChangesInCapitalAccountsSeriesBPreferredStockDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091002 - Disclosure - Changes in Capital Accounts, Series B Preferred Stock (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://pshipping.com./role/ChangesInCapitalAccountsSeriesCPreferredStockDetails" id="ChangesInCapitalAccountsSeriesCPreferredStockDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091004 - Disclosure - Changes in Capital Accounts, Series C Preferred Stock (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://pshipping.com./role/ChangesInCapitalAccountsOnefortenReverseStockSplitDetails" id="ChangesInCapitalAccountsOnefortenReverseStockSplitDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091006 - Disclosure - Changes in Capital Accounts, One-for-Ten Reverse Stock Split (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://pshipping.com./role/ChangesInCapitalAccountsShareRepurchaseProgramDetails" id="ChangesInCapitalAccountsShareRepurchaseProgramDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091008 - Disclosure - Changes in Capital Accounts, Share Repurchase Program (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://pshipping.com./role/ChangesInCapitalAccountsShareholdersRightsAgreementDetails" id="ChangesInCapitalAccountsShareholdersRightsAgreementDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091012 - Disclosure - Changes in Capital Accounts, Shareholders' Rights Agreement (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://pshipping.com./role/ChangesInCapitalAccountsTenderOfferForExchangeOfSharesDetails" id="ChangesInCapitalAccountsTenderOfferForExchangeOfSharesDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091014 - Disclosure - Changes in Capital Accounts, Tender Offer for Exchange of Shares (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://pshipping.com./role/ChangesInCapitalAccountsCompensationCostOnStockOptionAwardsDetails" id="ChangesInCapitalAccountsCompensationCostOnStockOptionAwardsDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091016 - Disclosure - Changes in Capital Accounts, Compensation Cost on Stock Option Awards (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://pshipping.com./role/ChangesInCapitalAccountsCompensationCostOnRestrictedCommonStockDetails" id="ChangesInCapitalAccountsCompensationCostOnRestrictedCommonStockDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091018 - Disclosure - Changes in Capital Accounts, Compensation Cost on Restricted Common Stock (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://pshipping.com./role/ChangesInCapitalAccountsAtMarketOfferingDetails" id="ChangesInCapitalAccountsAtMarketOfferingDetails">
        <!--Parent Role: Changes in Capital Accounts-->
        <link:definition>091020 - Disclosure - Changes in Capital Accounts, At The Market Offering (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://pshipping.com./role/InterestAndFinanceCostsDetails" id="InterestAndFinanceCostsDetails">
        <!--Parent Role: Interest and Finance Costs-->
        <link:definition>091100 - Disclosure - Interest and Finance Costs (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://pshipping.com./role/EarningsLossPerShareDetails" id="EarningsLossPerShareDetails">
        <!--Parent Role: Earnings / (Loss) per Share-->
        <link:definition>091200 - Disclosure - Earnings / (Loss) per Share (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://pshipping.com./role/IncomeTaxesDetails" id="IncomeTaxesDetails">
        <!--Parent Role: Income Taxes-->
        <link:definition>091300 - Disclosure - Income Taxes (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://pshipping.com./role/SubsequentEventsDetails" id="SubsequentEventsDetails">
        <!--Parent Role: Subsequent Events-->
        <link:definition>091500 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:import namespace="http://fasb.org/us-gaap/2021-01-31" schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/dei/2021q4" schemaLocation="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/country/2021" schemaLocation="https://xbrl.sec.gov/country/2021/country-2021.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/currency/2021" schemaLocation="https://xbrl.sec.gov/currency/2021/currency-2021.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/exch/2021" schemaLocation="https://xbrl.sec.gov/exch/2021/exch-2021.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/naics/2021" schemaLocation="https://xbrl.sec.gov/naics/2021/naics-2021.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/sic/2021" schemaLocation="https://xbrl.sec.gov/sic/2021/sic-2021.xsd" />
  <xs:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd" />
  <xs:import namespace="http://www.xbrl.org/2009/role/net" schemaLocation="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd" />
  <xs:import namespace="http://xbrl.sec.gov/stpr/2021" schemaLocation="https://xbrl.sec.gov/stpr/2021/stpr-2021.xsd" />
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" />
  <xs:import namespace="http://www.xbrl.org/2004/ref" schemaLocation="http://www.xbrl.org/2004/ref-2004-08-10.xsd" />
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" />
  <xs:import namespace="http://fasb.org/us-types/2021-01-31" schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-types-2021-01-31.xsd" />
  <xs:import namespace="http://www.xbrl.org/2009/arcrole/fact-explanatoryFact" schemaLocation="http://www.xbrl.org/lrr/arcrole/factExplanatory-2009-12-16.xsd" />
  <xs:import namespace="http://fasb.org/srt/2021-01-31" schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd" />
  <xs:import namespace="http://fasb.org/srt-types/2021-01-31" schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-types-2021-01-31.xsd" />
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd" />
  <xs:element name="PreferredStockNumberOfVotesPerShare" id="pshg_PreferredStockNumberOfVotesPerShare" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PreferredStockRepurchasedAndCancelledDuringPeriodShares" id="pshg_PreferredStockRepurchasedAndCancelledDuringPeriodShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DianaShippingIncMember" id="pshg_DianaShippingIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PreferredStockThresholdVotingPowerPercentage" id="pshg_PreferredStockThresholdVotingPowerPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="GainLossFromSaleOfProperty" id="pshg_GainLossFromSaleOfProperty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="ForeignCurrencyTransactionOperatingGainLossBeforeTax" id="pshg_ForeignCurrencyTransactionOperatingGainLossBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="VoyageExpenses" id="pshg_VoyageExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="ManagementFees" id="pshg_ManagementFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="VesselsNet" id="pshg_VesselsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="PropertyAndEquipmentNet" id="pshg_PropertyAndEquipmentNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="InterestAndFinanceCostsTextBlock" id="pshg_InterestAndFinanceCostsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="SubsequentEventAbstract" id="pshg_SubsequentEventAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NumberOfMembersOnBoardOfDirectors" id="pshg_NumberOfMembersOnBoardOfDirectors" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="CommonStockSharesTenderedShares" id="pshg_CommonStockSharesTenderedShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="LineOfCreditFacilityArrangementFee" id="pshg_LineOfCreditFacilityArrangementFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="UnsecuredCreditFacilityMember" id="pshg_UnsecuredCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ResignedBoardMembersMember" id="pshg_ResignedBoardMembersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="SaleOfPropertyTaxesAndExpenses" id="pshg_SaleOfPropertyTaxesAndExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="GrossProceedsFromSaleOfLandHeldForUse" id="pshg_GrossProceedsFromSaleOfLandHeldForUse" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="InsuranceClaimsReceivableMember" id="pshg_InsuranceClaimsReceivableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NumberOfVesselsAcquired" id="pshg_NumberOfVesselsAcquired" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationAssetsAbstract" id="pshg_DisposalGroupIncludingDiscontinuedOperationAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationImpairmentLoss" id="pshg_DisposalGroupIncludingDiscontinuedOperationImpairmentLoss" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationVoyageExpenses" id="pshg_DisposalGroupIncludingDiscontinuedOperationVoyageExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="ContainerSegmentMember" id="pshg_ContainerSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="DisposalGroupIncludingDiscontinuedOperationManagementFees" id="pshg_DisposalGroupIncludingDiscontinuedOperationManagementFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="TimeChartersMember" id="pshg_TimeChartersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="SpotChartersMember" id="pshg_SpotChartersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PoolChartersMember" id="pshg_PoolChartersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererGMember" id="pshg_ChartererGMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererDMember" id="pshg_ChartererDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererEMember" id="pshg_ChartererEMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererBMember" id="pshg_ChartererBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererAMember" id="pshg_ChartererAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererFMember" id="pshg_ChartererFMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ChartererCMember" id="pshg_ChartererCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VesselsNetAbstract" id="pshg_VesselsNetAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VesselsNetDisclosureTextBlock" id="pshg_VesselsNetDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PaminaAndRotterdamMember" id="pshg_PaminaAndRotterdamMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NumberOfVesselsImpaired" id="pshg_NumberOfVesselsImpaired" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PuconPaminaAndRotterdamMember" id="pshg_PuconPaminaAndRotterdamMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PuconMember" id="pshg_PuconMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="RotterdamMember" id="pshg_RotterdamMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VesselsDisposalsAbstract" id="pshg_VesselsDisposalsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PropertyPlantAndEquipmentDisposalsNet" id="pshg_PropertyPlantAndEquipmentDisposalsNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="AssetImpairmentChargesIncludingUnamortizedDrydockingCosts" id="pshg_AssetImpairmentChargesIncludingUnamortizedDrydockingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="DomingoContainerVesselMember" id="pshg_DomingoContainerVesselMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VesselsMember" id="pshg_VesselsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PropertyPlantAndEquipmentSalesPrice" id="pshg_PropertyPlantAndEquipmentSalesPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="NumberOfSubsidiaries" id="pshg_NumberOfSubsidiaries" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="VesselAcquisitionsAbstract" id="pshg_VesselAcquisitionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="BrioletteAndPFosMember" id="pshg_BrioletteAndPFosMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="BlueMoonMember" id="pshg_BlueMoonMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="RongelapShippingCompanyIncMember" id="pshg_RongelapShippingCompanyIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PFosPKikumaAndPYanbuMember" id="pshg_PFosPKikumaAndPYanbuMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PKikumaMember" id="pshg_PKikumaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PYanbuMember" id="pshg_PYanbuMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PFosMember" id="pshg_PFosMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CostsCapitalizedInVessels" id="pshg_CostsCapitalizedInVessels" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="MinimumStockOwnershipPercentageForTaxExemption" id="pshg_MinimumStockOwnershipPercentageForTaxExemption" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="FederalTaxRateOnUSSourceShippingIncome" id="pshg_FederalTaxRateOnUSSourceShippingIncome" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PercentageOfGrossIncomeSubjectToTax" id="pshg_PercentageOfGrossIncomeSubjectToTax" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PreferredStockRepurchasedAndCancelledDuringPeriodIncludingExpensesValue" id="pshg_PreferredStockRepurchasedAndCancelledDuringPeriodIncludingExpensesValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="PreferredStockRepurchasedAndCancelledDuringPeriodValue" id="pshg_PreferredStockRepurchasedAndCancelledDuringPeriodValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="TankerVesselsMember" id="pshg_TankerVesselsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PercentageOfAssumedVesselUtilization" id="pshg_PercentageOfAssumedVesselUtilization" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="AverageHistoricalRatesAvailableForEachTypeOfVesselTerm" id="pshg_AverageHistoricalRatesAvailableForEachTypeOfVesselTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="EstimatedResidualScrapRatePerLightweightTonForTankerAndContainerVessels" id="pshg_EstimatedResidualScrapRatePerLightweightTonForTankerAndContainerVessels" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="debit" />
  <xs:element name="NumberOfVesselsManagedByUnaffiliatedEntity" id="pshg_NumberOfVesselsManagedByUnaffiliatedEntity" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="VoyageExpensesPolicyPolicyTextBlock" id="pshg_VoyageExpensesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="GoingConcernPolicyTextBlock" id="pshg_GoingConcernPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="TransferOfDisposalGroupAssetIsExpectedToQualifyForRecognitionCompletionOfSalePeriod" id="pshg_TransferOfDisposalGroupAssetIsExpectedToQualifyForRecognitionCompletionOfSalePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="PeriodOfNonDisclosedValueOfUnsatisfiedPerformanceObligationsForContracts" id="pshg_PeriodOfNonDisclosedValueOfUnsatisfiedPerformanceObligationsForContracts" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="NonCashInvestingActivities" id="pshg_NonCashInvestingActivities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="PaymentsForAdvancesForVesselAcquisitionsAndOtherVesselCosts" id="pshg_PaymentsForAdvancesForVesselAcquisitionsAndOtherVesselCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="ProceedsFromSaleOfVessels" id="pshg_ProceedsFromSaleOfVessels" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="PaymentsForVesselAcquisitionsAndOtherVesselCosts" id="pshg_PaymentsForVesselAcquisitionsAndOtherVesselCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="ReclassificationOfCompensationCostOfIssuedRestrictedStockAwards" id="pshg_ReclassificationOfCompensationCostOfIssuedRestrictedStockAwards" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsideration" id="pshg_NoncashOrPartNoncashAcquisitionNoncashFinancialOrEquityInstrumentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="PaymentsForRepurchaseOfPreferredStockIncludingExpenses" id="pshg_PaymentsForRepurchaseOfPreferredStockIncludingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="IncreaseDecreaseInOperatingLeaseRightOfUseAsset" id="pshg_IncreaseDecreaseInOperatingLeaseRightOfUseAsset" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="IncreaseDecreaseInDrydockCosts" id="pshg_IncreaseDecreaseInDrydockCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateTerm" id="pshg_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRateTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ExercisePrice10Member" id="pshg_ExercisePrice10Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue" id="pshg_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="ExercisePrice1250Member" id="pshg_ExercisePrice1250Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ExercisePrice15Member" id="pshg_ExercisePrice15Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ExercisePrice20Member" id="pshg_ExercisePrice20Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ExercisePrice25Member" id="pshg_ExercisePrice25Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ExercisePrice30Member" id="pshg_ExercisePrice30Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="EquityIncentivePlan2015Member" id="pshg_EquityIncentivePlan2015Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" id="pshg_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodGrantDateFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="credit" />
  <xs:element name="Awarded20201230Member" id="pshg_Awarded20201230Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="Awarded20180215Member" id="pshg_Awarded20180215Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ExecutiveOfficersAndNonExecutiveDirectorsMember" id="pshg_ExecutiveOfficersAndNonExecutiveDirectorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="CommonStockSharesExchanged" id="pshg_CommonStockSharesExchanged" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="SeriesBConvertibleCumulativePerpetualPreferredStockMember" id="pshg_SeriesBConvertibleCumulativePerpetualPreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PreferredStockSharesIssuedUponExchange" id="pshg_PreferredStockSharesIssuedUponExchange" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="NumberOfTradingDaysForCommonStock" id="pshg_NumberOfTradingDaysForCommonStock" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="CommonStockSharesThatCanBeExchanged" id="pshg_CommonStockSharesThatCanBeExchanged" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="PreferredStockRedemptionPeriod" id="pshg_PreferredStockRedemptionPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="InterestAndFinanceCostsTableTextBlock" id="pshg_InterestAndFinanceCostsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="CommonStockThatCanBeSoldValue" id="pshg_CommonStockThatCanBeSoldValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="ShareRepurchaseProgramMember" id="pshg_ShareRepurchaseProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="LongTermDebtGrossNoncurrent" id="pshg_LongTermDebtGrossNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="LongTermDebtGrossCurrent" id="pshg_LongTermDebtGrossCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="PiraeusBankSecuredTermLoanMember" id="pshg_PiraeusBankSecuredTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NordeaBankSecuredTermLoanMember" id="pshg_NordeaBankSecuredTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="TerminatedLoanWithAddiewellLtdMember" id="pshg_TerminatedLoanWithAddiewellLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NordeaBankAndPiraeusBankLoansMember" id="pshg_NordeaBankAndPiraeusBankLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="DebtInstrumentNumberOfTankerVesselsUsedAsCollateral" id="pshg_DebtInstrumentNumberOfTankerVesselsUsedAsCollateral" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DebtInstrumentMinimumLiquidityRequirement" id="pshg_DebtInstrumentMinimumLiquidityRequirement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="MinimumTermOfCharterUsedAsSecurityUnderLoanAgreements" id="pshg_MinimumTermOfCharterUsedAsSecurityUnderLoanAgreements" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DebtInstrumentArrangementFeePercentage" id="pshg_DebtInstrumentArrangementFeePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DebtInstrumentNumberOfBalloonInstallmentPayments" id="pshg_DebtInstrumentNumberOfBalloonInstallmentPayments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="DebtInstrumentNumberOfVesselOwningSubsidiariesEnteringIntoLoanAgreement" id="pshg_DebtInstrumentNumberOfVesselOwningSubsidiariesEnteringIntoLoanAgreement" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="DebtInstrumentNumberOfLongTermLoanAgreements" id="pshg_DebtInstrumentNumberOfLongTermLoanAgreements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" />
  <xs:element name="DebtInstrumentBorrowingCapacity" id="pshg_DebtInstrumentBorrowingCapacity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="instant" xbrli:balance="credit" />
  <xs:element name="ClosingPeriodForRelevantInsurancePolicyYear" id="pshg_ClosingPeriodForRelevantInsurancePolicyYear" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="MaximumPollutionCoveragePerVesselPerIncident" id="pshg_MaximumPollutionCoveragePerVesselPerIncident" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="OperatingLeaseMonthlyCost" id="pshg_OperatingLeaseMonthlyCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="DianaWilhelmsenManagementLimitedMember" id="pshg_DianaWilhelmsenManagementLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="SaleAndPurchaseCommissionsMember" id="pshg_SaleAndPurchaseCommissionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="BrokerageFeesMember" id="pshg_BrokerageFeesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="NetIncomeLossFromDiscontinuedOperationsMember" id="pshg_NetIncomeLossFromDiscontinuedOperationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="ManagementFeesMember" id="pshg_ManagementFeesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="SteamshipShipbrokingEnterprisesIncMember" id="pshg_SteamshipShipbrokingEnterprisesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="RelatedPartyTerminationCosts" id="pshg_RelatedPartyTerminationCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" xbrli:balance="debit" />
  <xs:element name="AltairTravelAgencySAMember" id="pshg_AltairTravelAgencySAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PureBrokerageAndShippingCorpMember" id="pshg_PureBrokerageAndShippingCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VoyageExpensesMember" id="pshg_VoyageExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="TravelExpensesMember" id="pshg_TravelExpensesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PropertyPlantAndEquipmentDisclosuresTable" id="pshg_PropertyPlantAndEquipmentDisclosuresTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="PropertyPlantAndEquipmentDisclosuresLineItems" id="pshg_PropertyPlantAndEquipmentDisclosuresLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="VesselsNetTableTextBlock" id="pshg_VesselsNetTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ClassOfWarrantOrRightNumberOfRightsIncludedWithEachShare" id="pshg_ClassOfWarrantOrRightNumberOfRightsIncludedWithEachShare" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ClassOfWarrantOrRightOwnershipPercentageRequiredAfterMergerOrOtherBusinessCombination" id="pshg_ClassOfWarrantOrRightOwnershipPercentageRequiredAfterMergerOrOtherBusinessCombination" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ClassOfWarrantOrRightRightsExercised" id="pshg_ClassOfWarrantOrRightRightsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ClassOfWarrantOrRightBeneficialOwnershipPercentage" id="pshg_ClassOfWarrantOrRightBeneficialOwnershipPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="ClassOfWarrantOrRightExercisesInPeriod" id="pshg_ClassOfWarrantOrRightExercisesInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" abstract="false" xbrli:periodType="duration" />
  <xs:element name="SeriesB2PreferredStockMember" id="pshg_SeriesB2PreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="SeriesB1PreferredStockMember" id="pshg_SeriesB1PreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
  <xs:element name="RegisteredDirectOfferingMember" id="pshg_RegisteredDirectOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" abstract="true" xbrli:periodType="duration" />
</xs:schema>
