<?xml version="1.0"?><ownershipDocument><schemaVersion>X0201</schemaVersion>    <documentType>4</documentType><periodOfReport>2003-12-22</periodOfReport><notSubjectToSection16>0</notSubjectToSection16><issuer><issuerCik>0000026537</issuerCik><issuerName>SENSYTECH INC</issuerName>        <issuerTradingSymbol>stst</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId><rptOwnerCik>0001250606</rptOwnerCik><rptOwnerName>IRVIN JOHN</rptOwnerName></reportingOwnerId><reportingOwnerAddress><rptOwnerStreet1>1620 BLACKBURN HEIGHTS DRIVE</rptOwnerStreet1><rptOwnerStreet2></rptOwnerStreet2><rptOwnerCity>SEWICKLEY</rptOwnerCity><rptOwnerState>PA</rptOwnerState><rptOwnerZipCode>15143</rptOwnerZipCode><rptOwnerStateDescription></rptOwnerStateDescription></reportingOwnerAddress><reportingOwnerRelationship><isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeTable><derivativeTransaction><securityTitle><value>Sensytech common</value></securityTitle><conversionOrExercisePrice><value>14.2200</value></conversionOrExercisePrice><transactionDate><value>2003-12-15</value></transactionDate><deemedExecutionDate></deemedExecutionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionTimeliness><value></value></transactionTimeliness><transactionAmounts><transactionShares><value>5000.0000</value></transactionShares><transactionPricePerShare><value>71100.0000</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>5000.0000</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>15000.0000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership></ownershipNature></derivativeTransaction></derivativeTable><footnotes></footnotes><remarks></remarks><ownerSignature><signatureName>John irvin</signatureName><signatureDate>2003-12-22</signatureDate></ownerSignature></ownershipDocument>

