Designation:F1321−14AnAmericanNationalStandardStandardGuideforConductingaStabilityTest(LightweightSurveyandIncliningExperiment)toDeterminetheLightShipDisplacementandCentersofGravityofaVessel1ThisstandardisissuedunderthefixeddesignationF1321;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.INTRODUCTIONThisguideprovidesthemarineindustrywithabasicunderstandingofthevariousaspectsofastabilitytest.Itcontainsproceduresforconductingastabilitytesttoensurethatvalidresultsareobtainedwithmaximumprecisionataminimalcosttoowners,shipyards,andthegovernment.Thisguideisnotintendedtoinstructapersonintheactualcalculationofthelightshipdisplacementandcentersofgravity,butrathertobeaguidetothenecessaryprocedurestobefollowedtogatheraccuratedataforuseinthecalculationofthelightshipcharacteristics.Acompleteunderstandingofthecorrectproceduresusedtoperformastabilitytestisimperativetoensurethatthetestisconductedproperlyandsothatresultscanbeexaminedforaccuracyastheincliningexperimentisconducted.Itisrecommendedthattheseproceduresbeusedonallvesselsandmarinecraft.1.Scope1.1Thisguidecoversthedeterminationofavessel’slightshipcharacteristics.Inthisstandard,avesselisatraditionalhull-formedvessel.Thestabilitytestcanbeconsideredtobetwoseparatetasks;thelightweightsurveyandtheincliningexperiment.Thestabilitytestisrequiredformostvesselsupontheircompletionandaftermajorconversions.Itisnormallyconductedinshoreincalmweatherconditionsandusuallyrequiresthevesselbetakenoutofservicetoprepareforandconductthestabilitytest.Thethreelightshipcharacteristicsdeterminedfromthestabilitytestforconventional(symmetri-cal)shipsaredisplacement(“displ”),longitudinalcenterofgravity(“LCG”),andtheverticalcenterofgravity(“KG”).Thetransversecenterofgr...
