<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e69a2-d071-7408-bbca-8045a371375c,g:7a0c6002-58d4-4641-8e88-b323958479bb-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:onew="http://onewatermarine.com/20260630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://onewatermarine.com/20260630">
  <xs:import namespace="http://fasb.org/srt/2026" schemaLocation="https://xbrl.fasb.org/srt/2026/elts/srt-2026.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2026" schemaLocation="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.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/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2024-01-31" schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2026" schemaLocation="https://xbrl.sec.gov/dei/2026/dei-2026.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/ecd/2026" schemaLocation="https://xbrl.sec.gov/ecd/2026/ecd-2026.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="onew-20260630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="onew-20260630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="onew-20260630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="onew-20260630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="Cover" roleURI="http://onewatermarine.com/role/Cover">
        <link:definition>0000001 - Document - Cover</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>9952151 - Statement - CONDENSED 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 id="CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>9952152 - Statement - CONDENSED 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 id="CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONS">
        <link:definition>9952153 - Statement - CONDENSED 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 id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVELOSS">
        <link:definition>9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE 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 id="CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITY">
        <link:definition>9952155 - Statement - CONDENSED 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 id="CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYParenthetical" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFSTOCKHOLDERSEQUITYParenthetical">
        <link:definition>9952156 - Statement - CONDENSED 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 id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://onewatermarine.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952157 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DescriptionofCompanyandBasisofPresentation" roleURI="http://onewatermarine.com/role/DescriptionofCompanyandBasisofPresentation">
        <link:definition>9952158 - Disclosure - Description of Company and Basis of Presentation</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPolicies" roleURI="http://onewatermarine.com/role/SummaryofSignificantAccountingPolicies">
        <link:definition>9952159 - Disclosure - Summary of 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 id="NewAccountingPronouncements" roleURI="http://onewatermarine.com/role/NewAccountingPronouncements">
        <link:definition>9952160 - Disclosure - New Accounting Pronouncements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Dispositions" roleURI="http://onewatermarine.com/role/Dispositions">
        <link:definition>9952161 - Disclosure - Dispositions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccountsReceivable" roleURI="http://onewatermarine.com/role/AccountsReceivable">
        <link:definition>9952162 - Disclosure - Accounts Receivable</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Inventories" roleURI="http://onewatermarine.com/role/Inventories">
        <link:definition>9952163 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssets" roleURI="http://onewatermarine.com/role/GoodwillandIntangibleAssets">
        <link:definition>9952164 - Disclosure - Goodwill and Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="NotesPayableFloorPlan" roleURI="http://onewatermarine.com/role/NotesPayableFloorPlan">
        <link:definition>9952165 - Disclosure - Notes Payable - Floor Plan</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongtermDebtandLineofCredit" roleURI="http://onewatermarine.com/role/LongtermDebtandLineofCredit">
        <link:definition>9952166 - Disclosure - Long-term Debt and Line of Credit</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativeandHedgingInstruments" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstruments">
        <link:definition>9952167 - Disclosure - Derivative and Hedging Instruments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://onewatermarine.com/role/StockholdersEquity">
        <link:definition>9952168 - Disclosure - Stockholders&#8217; 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 id="FairValueMeasurements" roleURI="http://onewatermarine.com/role/FairValueMeasurements">
        <link:definition>9952169 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringandImpairment" roleURI="http://onewatermarine.com/role/RestructuringandImpairment">
        <link:definition>9952170 - Disclosure - Restructuring and Impairment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://onewatermarine.com/role/IncomeTaxes">
        <link:definition>9952171 - 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 id="ContingenciesandCommitments" roleURI="http://onewatermarine.com/role/ContingenciesandCommitments">
        <link:definition>9952172 - Disclosure - Contingencies and Commitments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Leases" roleURI="http://onewatermarine.com/role/Leases">
        <link:definition>9952173 - Disclosure - Leases</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RelatedPartyTransactions" roleURI="http://onewatermarine.com/role/RelatedPartyTransactions">
        <link:definition>9952174 - Disclosure - Related Party Transactions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://onewatermarine.com/role/SegmentInformation">
        <link:definition>9952175 - Disclosure - Segment 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 id="DescriptionofCompanyandBasisofPresentationPolicies" roleURI="http://onewatermarine.com/role/DescriptionofCompanyandBasisofPresentationPolicies">
        <link:definition>9955511 - Disclosure - Description of Company and Basis of Presentation (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 id="SummaryofSignificantAccountingPoliciesTables" roleURI="http://onewatermarine.com/role/SummaryofSignificantAccountingPoliciesTables">
        <link:definition>9955512 - Disclosure - Summary of Significant Accounting Policies (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 id="AccountsReceivableTables" roleURI="http://onewatermarine.com/role/AccountsReceivableTables">
        <link:definition>9955513 - Disclosure - Accounts Receivable (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 id="InventoriesTables" roleURI="http://onewatermarine.com/role/InventoriesTables">
        <link:definition>9955514 - Disclosure - Inventories (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 id="GoodwillandIntangibleAssetsTables" roleURI="http://onewatermarine.com/role/GoodwillandIntangibleAssetsTables">
        <link:definition>9955515 - Disclosure - Goodwill and Intangible Assets (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 id="LongtermDebtandLineofCreditTables" roleURI="http://onewatermarine.com/role/LongtermDebtandLineofCreditTables">
        <link:definition>9955516 - Disclosure - Long-term Debt and Line of Credit (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 id="DerivativeandHedgingInstrumentsTables" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsTables">
        <link:definition>9955517 - Disclosure - Derivative and Hedging Instruments (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 id="StockholdersEquityTables" roleURI="http://onewatermarine.com/role/StockholdersEquityTables">
        <link:definition>9955518 - Disclosure - Stockholders&#8217; Equity (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 id="FairValueMeasurementsTables" roleURI="http://onewatermarine.com/role/FairValueMeasurementsTables">
        <link:definition>9955519 - Disclosure - Fair Value Measurements (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 id="SegmentInformationTables" roleURI="http://onewatermarine.com/role/SegmentInformationTables">
        <link:definition>9955520 - Disclosure - Segment Information (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 id="DescriptionofCompanyandBasisofPresentationDetails" roleURI="http://onewatermarine.com/role/DescriptionofCompanyandBasisofPresentationDetails">
        <link:definition>9955521 - Disclosure - Description of Company and Basis of Presentation (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 id="SummaryofSignificantAccountingPoliciesNarrativeDetails" roleURI="http://onewatermarine.com/role/SummaryofSignificantAccountingPoliciesNarrativeDetails">
        <link:definition>9955522 - Disclosure - Summary of Significant Accounting Policies - Narrative (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 id="SummaryofSignificantAccountingPoliciesSummaryofContractLiabilitiesDetails" roleURI="http://onewatermarine.com/role/SummaryofSignificantAccountingPoliciesSummaryofContractLiabilitiesDetails">
        <link:definition>9955523 - Disclosure - Summary of Significant Accounting Policies - Summary of Contract Liabilities (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 id="SummaryofSignificantAccountingPoliciesSummaryofPercentagesonTimingofRevenueRecognitionDetails" roleURI="http://onewatermarine.com/role/SummaryofSignificantAccountingPoliciesSummaryofPercentagesonTimingofRevenueRecognitionDetails">
        <link:definition>9955524 - Disclosure - Summary of Significant Accounting Policies - Summary of Percentages on Timing of Revenue Recognition (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 id="DiscontinuedOperationsandDisposalGroupsDetails" roleURI="http://onewatermarine.com/role/DiscontinuedOperationsandDisposalGroupsDetails">
        <link:definition>9955525 - Disclosure - Discontinued Operations and Disposal Groups (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 id="AccountsReceivableDetails" roleURI="http://onewatermarine.com/role/AccountsReceivableDetails">
        <link:definition>9955526 - Disclosure - 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 id="InventoriesDetails" roleURI="http://onewatermarine.com/role/InventoriesDetails">
        <link:definition>9955527 - Disclosure - Inventories (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 id="GoodwillandIntangibleAssetsSummaryofChangesinGoodwillandIdentifiableIntangibleAssetsDetails" roleURI="http://onewatermarine.com/role/GoodwillandIntangibleAssetsSummaryofChangesinGoodwillandIdentifiableIntangibleAssetsDetails">
        <link:definition>9955528 - Disclosure - Goodwill and Intangible Assets - Summary of Changes in Goodwill and Identifiable Intangible 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 id="GoodwillandIntangibleAssetsNarrativeDetails" roleURI="http://onewatermarine.com/role/GoodwillandIntangibleAssetsNarrativeDetails">
        <link:definition>9955529 - Disclosure - Goodwill and Intangible Assets - Narrative (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 id="GoodwillandIntangibleAssetsSummaryofExpectedAmortizationExpenseDetails" roleURI="http://onewatermarine.com/role/GoodwillandIntangibleAssetsSummaryofExpectedAmortizationExpenseDetails">
        <link:definition>9955530 - Disclosure - Goodwill and Intangible Assets - Summary of Expected Amortization Expense (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 id="NotesPayableFloorPlanDetails" roleURI="http://onewatermarine.com/role/NotesPayableFloorPlanDetails">
        <link:definition>9955531 - Disclosure - Notes Payable - Floor Plan (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 id="LongtermDebtandLineofCreditNarrativeDetails" roleURI="http://onewatermarine.com/role/LongtermDebtandLineofCreditNarrativeDetails">
        <link:definition>9955532 - Disclosure - Long-term Debt and Line of Credit - Narrative (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 id="LongtermDebtandLineofCreditSummaryofLongtermDebtandLineofCreditDetails" roleURI="http://onewatermarine.com/role/LongtermDebtandLineofCreditSummaryofLongtermDebtandLineofCreditDetails">
        <link:definition>9955533 - Disclosure - Long-term Debt and Line of Credit - Summary of Long-term Debt and Line of Credit (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 id="DerivativeandHedgingInstrumentsNarrativeDetails" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsNarrativeDetails">
        <link:definition>9955534 - Disclosure - Derivative and Hedging Instruments - Narrative (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 id="DerivativeandHedgingInstrumentsNotionalValueDetails" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsNotionalValueDetails">
        <link:definition>9955535 - Disclosure - Derivative and Hedging Instruments - Notional Value (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 id="DerivativeandHedgingInstrumentsBalanceSheetLocationDetails" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsBalanceSheetLocationDetails">
        <link:definition>9955536 - Disclosure - Derivative and Hedging Instruments - Balance Sheet Location (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 id="DerivativeandHedgingInstrumentsBalanceSheetLocationDetails_1" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsBalanceSheetLocationDetails_1">
        <link:definition>9955536 - Disclosure - Derivative and Hedging Instruments - Balance Sheet Location (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 id="DerivativeandHedgingInstrumentsEffectoftheInterestRateSwapAgreementsDetails" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsEffectoftheInterestRateSwapAgreementsDetails">
        <link:definition>9955537 - Disclosure - Derivative and Hedging Instruments - Effect of the Interest Rate Swap Agreements (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 id="DerivativeandHedgingInstrumentsEffectoftheInterestRateSwapAgreementsDetails_1" roleURI="http://onewatermarine.com/role/DerivativeandHedgingInstrumentsEffectoftheInterestRateSwapAgreementsDetails_1">
        <link:definition>9955537 - Disclosure - Derivative and Hedging Instruments - Effect of the Interest Rate Swap Agreements (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 id="StockholdersEquityNarrativeDetails" roleURI="http://onewatermarine.com/role/StockholdersEquityNarrativeDetails">
        <link:definition>9955538 - Disclosure - Stockholders&#8217; Equity - Narrative (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 id="StockholdersEquitySummaryofRestrictedStockUnitsActivityDetails" roleURI="http://onewatermarine.com/role/StockholdersEquitySummaryofRestrictedStockUnitsActivityDetails">
        <link:definition>9955539 - Disclosure - Stockholders&#8217; Equity - Summary of Restricted Stock Units Activity (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 id="StockholdersEquitySummaryofNetLossEarningsPerShareDetails" roleURI="http://onewatermarine.com/role/StockholdersEquitySummaryofNetLossEarningsPerShareDetails">
        <link:definition>9955540 - Disclosure - Stockholders&#8217; Equity - Summary of Net (Loss) Earnings 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 id="StockholdersEquitySummaryofAntidilutiveSecuritiesDetails" roleURI="http://onewatermarine.com/role/StockholdersEquitySummaryofAntidilutiveSecuritiesDetails">
        <link:definition>9955541 - Disclosure - Stockholders&#8217; Equity - Summary of Antidilutive Securities (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 id="StockholdersEquitySummaryofEmployeeStockPurchasePlanDetails" roleURI="http://onewatermarine.com/role/StockholdersEquitySummaryofEmployeeStockPurchasePlanDetails">
        <link:definition>9955542 - Disclosure - Stockholders&#8217; Equity - Summary of Employee Stock Purchase Plan (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 id="FairValueMeasuresSummaryofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails" roleURI="http://onewatermarine.com/role/FairValueMeasuresSummaryofFinancialAssetsandLiabilitiesMeasuredatFairValueDetails">
        <link:definition>9955543 - Disclosure - Fair Value Measures - Summary of Financial Assets and Liabilities Measured at Fair Value (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 id="FairValueMeasuresSummaryofChangesinFairValueofContingentConsiderationDetails" roleURI="http://onewatermarine.com/role/FairValueMeasuresSummaryofChangesinFairValueofContingentConsiderationDetails">
        <link:definition>9955544 - Disclosure - Fair Value Measures - Summary of Changes in Fair Value of Contingent Consideration (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 id="RestructuringandImpairmentDetails" roleURI="http://onewatermarine.com/role/RestructuringandImpairmentDetails">
        <link:definition>9955545 - Disclosure - Restructuring and 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 id="RestructuringandImpairmentDetails_1" roleURI="http://onewatermarine.com/role/RestructuringandImpairmentDetails_1">
        <link:definition>9955545 - Disclosure - Restructuring and 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 id="IncomeTaxesDetails" roleURI="http://onewatermarine.com/role/IncomeTaxesDetails">
        <link:definition>9955546 - 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 id="LeasesDetails" roleURI="http://onewatermarine.com/role/LeasesDetails">
        <link:definition>9955547 - Disclosure - Leases (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 id="RelatedPartyTransactionsDetails" roleURI="http://onewatermarine.com/role/RelatedPartyTransactionsDetails">
        <link:definition>9955548 - Disclosure - Related Party Transactions (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 id="SegmentInformationReportableSegmentFinancialInformationDetails" roleURI="http://onewatermarine.com/role/SegmentInformationReportableSegmentFinancialInformationDetails">
        <link:definition>9955549 - Disclosure - Segment Information - Reportable Segment Financial 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 id="SegmentInformationReconciliationInterestExpenseAssetsDetails" roleURI="http://onewatermarine.com/role/SegmentInformationReconciliationInterestExpenseAssetsDetails">
        <link:definition>9955550 - Disclosure - Segment Information - Reconciliation, Interest Expense, Assets (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:element id="onew_NotePayableFloorPlan" abstract="false" name="NotePayableFloorPlan" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_CurrentPortionOfTaxReceivableAgreementLiability" abstract="false" name="CurrentPortionOfTaxReceivableAgreementLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_TaxReceivableAgreementLiabilityNoncurrent" abstract="false" name="TaxReceivableAgreementLiabilityNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_NewSalesMember" abstract="true" name="NewSalesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_PreOwnedMember" abstract="true" name="PreOwnedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_FinanceAndInsuranceIncomeMember" abstract="true" name="FinanceAndInsuranceIncomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_ServicePartsOtherMember" abstract="true" name="ServicePartsOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_TransactionCosts" abstract="false" name="TransactionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_ChangeInFairValueOfContingentConsideration" abstract="false" name="ChangeInFairValueOfContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_FloorplanInterestExpense" abstract="false" name="FloorplanInterestExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_NetIncomeLossAttributableToNoncontrollingInterestOfSubsidiary" abstract="false" name="NetIncomeLossAttributableToNoncontrollingInterestOfSubsidiary" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_NoncontrollingInterestDistributionToMembers" abstract="false" name="NoncontrollingInterestDistributionToMembers" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_AdjustmentsToAdditionalPaidInCapitalEstablishmentOfLiabilitiesUnderTaxReceivableAgreementAndRelatedToChangesToDeferredTaxAssets" abstract="false" name="AdjustmentsToAdditionalPaidInCapitalEstablishmentOfLiabilitiesUnderTaxReceivableAgreementAndRelatedToChangesToDeferredTaxAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligation" abstract="false" name="ShareBasedPaymentArrangementSharesWithheldForTaxWithholdingObligation" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_GainLossOnChangeInFairValueOfContingentConsideration" abstract="false" name="GainLossOnChangeInFairValueOfContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_NetPaymentsBorrowingsFromFloorplan" abstract="false" name="NetPaymentsBorrowingsFromFloorplan" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_DescriptionOfCompanyAndBasisOfPresentationAbstract" abstract="true" name="DescriptionOfCompanyAndBasisOfPresentationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="onew_SalesTaxPolicyTextBlock" abstract="false" name="SalesTaxPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="onew_VendorConsiderationReceivedPolicyTextBlock" abstract="false" name="VendorConsiderationReceivedPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="onew_DescriptionOfCompanyAndBasisOfPresentationTable" abstract="true" name="DescriptionOfCompanyAndBasisOfPresentationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="onew_OneWaterLLCMember" abstract="true" name="OneWaterLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_TopTenBrandsMember" abstract="true" name="TopTenBrandsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_MalibuBoatsIncMember" abstract="true" name="MalibuBoatsIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_DescriptionOfCompanyAndBasisOfPresentationLineItems" abstract="true" name="DescriptionOfCompanyAndBasisOfPresentationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="onew_NumberOfDistributionCenters" abstract="false" name="NumberOfDistributionCenters" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="onew_NumberOfTopBrands" abstract="false" name="NumberOfTopBrands" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="onew_ContractWithCustomerLiabilityRollForward" abstract="true" name="ContractWithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="onew_OceanBioChemHoldingsInc.Member" abstract="true" name="OceanBioChemHoldingsInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_DistributionMember" abstract="true" name="DistributionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_FinanceContractsMaximumFundingPeriod" abstract="false" name="FinanceContractsMaximumFundingPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="onew_ContractsInTransitMember" abstract="true" name="ContractsInTransitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_ManufacturerReceivableMember" abstract="true" name="ManufacturerReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_IncomeTaxReceivableMember" abstract="true" name="IncomeTaxReceivableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_NewVesselsMember" abstract="true" name="NewVesselsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_PreOwnedVesselsMember" abstract="true" name="PreOwnedVesselsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_WorkInProcessPartsAndAccessoriesMember" abstract="true" name="WorkInProcessPartsAndAccessoriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_DealershipMember" abstract="true" name="DealershipMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_IntangibleAssetsDisclosureRollForward" abstract="true" name="IntangibleAssetsDisclosureRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="onew_IntangibleAssetsAcquired" abstract="false" name="IntangibleAssetsAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_InventoryFinancingFacilityMember" abstract="true" name="InventoryFinancingFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_OvertradeCapacityMember" abstract="true" name="OvertradeCapacityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_BoatRateMember" abstract="true" name="BoatRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_WellsFargoCommercialDistributionFinanceLimitedLiabilityCompanyMember" abstract="true" name="WellsFargoCommercialDistributionFinanceLimitedLiabilityCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_NewBoatMember" abstract="true" name="NewBoatMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_NewInventoryMember" abstract="true" name="NewInventoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_PreOwnedInventoryMember" abstract="true" name="PreOwnedInventoryMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_DebtInstrumentTermOfVariableRate" abstract="false" name="DebtInstrumentTermOfVariableRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="onew_PercentageOfFinanceProvidedOfVendorInvoicePrice" abstract="false" name="PercentageOfFinanceProvidedOfVendorInvoicePrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="onew_AmendedAndRestatedCreditAgreementMember" abstract="true" name="AmendedAndRestatedCreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_AmendedAndRestatedRevolvingCreditFacilityMember" abstract="true" name="AmendedAndRestatedRevolvingCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_SwinglineLoansMember" abstract="true" name="SwinglineLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_AmendedAndRestatedTermLoanFacilityMember" abstract="true" name="AmendedAndRestatedTermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_TermNotePayableSecuredDebtMember" abstract="true" name="TermNotePayableSecuredDebtMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_RevolvingNotePayableMember" abstract="true" name="RevolvingNotePayableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_CommercialVehicleNotePayableMember" abstract="true" name="CommercialVehicleNotePayableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_TermSOFRMember" abstract="true" name="TermSOFRMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_TimeBasedRestrictedStockUnitsMember" abstract="true" name="TimeBasedRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_PercentageOfTargetGrantedForAwardEligibleToBeEarnedBasedOnRelativePerformance" abstract="false" name="PercentageOfTargetGrantedForAwardEligibleToBeEarnedBasedOnRelativePerformance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="onew_NumberOfPerformanceShareVestedToCommonStockForEachUnit" abstract="false" name="NumberOfPerformanceShareVestedToCommonStockForEachUnit" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="onew_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualInstallmentsForAwardsToVest" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfEqualInstallmentsForAwardsToVest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="onew_PercentageOfExpectedPerformanceTargetsToBeAchievedTargetAward" abstract="false" name="PercentageOfExpectedPerformanceTargetsToBeAchievedTargetAward" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="onew_PercentageOfOutstandingSharesForEmployeeStockPurchasePlanSharesIssuance" abstract="false" name="PercentageOfOutstandingSharesForEmployeeStockPurchasePlanSharesIssuance" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="onew_AccruedStockPurchaseValueEmployeeStockPurchasePlan" abstract="false" name="AccruedStockPurchaseValueEmployeeStockPurchasePlan" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_ContingentConsideration" abstract="false" name="ContingentConsideration" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_TaxReceivableAgreementLiability" abstract="false" name="TaxReceivableAgreementLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_PercentageOfNetCashSavings" abstract="false" name="PercentageOfNetCashSavings" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="onew_AffiliatedEntitiesAndIndividualsMember" abstract="true" name="AffiliatedEntitiesAndIndividualsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="onew_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestAdjusted" abstract="false" name="NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_RestructuringSettlementAndImpairmentProvisionsAdjusted" abstract="false" name="RestructuringSettlementAndImpairmentProvisionsAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="onew_DepreciationDepletionAndAmortizationNonproductionAdjusted" abstract="false" name="DepreciationDepletionAndAmortizationNonproductionAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
