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Elements and Performance Criteria
Range Statement
Performance Evidence
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria on at least one occasion and include:applying International Maritime Organization (IMO) recommendations concerning vessel stabilityapplying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and work practicesattending to appropriate level of detail in recordkeepingdetermining stability and trim requirements for docking or slipping the vesseldetermining the effect on trim and stability of vessel in the event of damage to and consequent flooding of a compartment, and countermeasures to be takenidentifying vessels trim and stability factorsinterpreting and applying information on the fundamental principles of vessel construction and the theories and factors affecting trim and stability, and measures necessary to preserve trim and stabilitymaintaining stability and stress conditions within safe limits at all timesproducing accurate and reliable documentationundertaking stability calculations, including:calculating required load distribution to achieve desired trimcalculations for change of draught, trim and heel when entering different water densities and to bilging of compartmentscentre of gravity (CG) of a vessel using an inclining experiment and effect of suspended weightschanges to draught, trim and heel due to adding or removing fuel, ballast or cargodetermining required correction for height of CG for free surface effectdetermining values of righting lever and construction of righting lever curvesdisplacement, wetted surface, form coefficients, tonne per centimetre (TPC) immersion, application of Simpson’s Rules to first and second moments of area, centroids and centres of pressureeffect on stability of dry docking and groundinghydrostatic stability of a vesselmoment of statistical stability at small angles of heelpermeabilityshear force and bending moment calculationstransverse and longitudinal stability using hydrostatic datavessel CG, centre of buoyancy and metacentreusing automatic data-based equipment. |
Knowledge Evidence
Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria and include knowledge of:causes and repercussions of a heeling vessel data and information related to stability management, including:cargo handling equipmentinstructions of relevant maritime authoritiesmanufacturer instructions and proceduresorganisational cargo handling proceduresrelevant Australian and international standards and regulatory requirementsrelevant WHS/OHS legislationvessel and shore safety checklistsvessel cargo securing manualvessel logvessel register of materials handling equipmenteffects of angle of loll, including centre of buoyancy, how a ship behaves at the angle of loll, inherent dangers, corrective action and the difference between a loll and a listeffects of density of sea water on the draught and freeboard of a vesseleffects of flooding on transverse stability and trim, including:calculation of vessel after floodingcargo vesselspassenger shipsfeatures of the load-line and draught marks of a vessel and procedures for carrying out related calculationsfundamental theories and principles of ship construction and the theories and factors that impact on trim and stability, and measures necessary to preserve trim and stabilityIMO recommendations concerning vessel stabilitylevelling arrangements for damaged side compartmentsnature of flooding, including:flooding due to collision or groundingingress of sea water through hatch covers or ruptured pipesprinciple stresses that act on the structure of a vessel, including panting and pounding, shear force, bending moments and torsional stressprinciples of parametric rolling and control methodsprinciples of synchronous rolling and methods for its controlprocedures for calculating the required load distribution to achieve the desired trimresponsibilities under international conventions and codes, including:IMO grain regulations and grain heeling moment informationminimum stability requirements required by Load Line Rules and Intact Stability Codepassenger ship stability after damageuse of weather criterionstability, including:dynamicalintact, including grainstaticalsuitable strategies for stabilising vesselssurvey and dry dock requirementstrim and listtypical problems related to the control of trim and stability for vessels of 500 gross tonnage (GT) and morevessels trim and stability factors for:dry dockingexcessive trimfree surface of a liquidgroundinghandling of heavy weightslarge swell conditionsshift of cargowind heelWHS/OHS requirements and work practices. |