<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-15</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000026537</issuerCik><issuerName>SENSYTECH INC</issuerName>        <issuerTradingSymbol>stst</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001250601</rptOwnerCik><rptOwnerName>ESGUERRA DELANO R</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>17508 PINEHURST COURT</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>PURCELLVILLE</rptOwnerCity><rptOwnerState>VA</rptOwnerState><rptOwnerZipCode>20132</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>0</isDirector><isOfficer>1</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther><officerTitle>Vice President</officerTitle></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Option to Purchase</value></securityTitle><conversionOrExercisePrice><value>14.2200</value></conversionOrExercisePrice><transactionDate><value>2003-12-19</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>6500.0000</value></transactionShares><transactionPricePerShare><value>92430.0000</value></transactionPricePerShare><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2004-12-15</value></exerciseDate><expirationDate><value>2014-12-15</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Option to Purchase</value></underlyingSecurityTitle><underlyingSecurityShares><value>6500.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>16500.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>Delano R. Esguerra //S//</signatureName><signatureDate>2003-12-19</signatureDate></ownerSignature></ownershipDocument>

