MARA023 — Manage trim, stability and stress of a vessel

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What an assessment for MARA023 must cover

46 assessable components: 4 elements (14 performance criteria), 10 performance evidence and 22 knowledge evidence requirements. An audit-defensible tool maps every question and task back to these — that mapping is the coverage matrix Auditori generates alongside the assessment.

Elements & performance criteria

1 Manage vessel trim under normal operating conditions

1.1Stability analysis and weight distribution planning are conducted at a time frequency and scope appropriate to the proposed nature of the voyage and vessel operation
1.2Weight distribution is arranged to maintain vessel within acceptable stability limits for the anticipated operational situations likely to be experienced during the voyage
1.3Calculations are made to determine the draught and centre of gravity (CG) of vessel after adding, removing or shifting weight
1.4Factors affecting the stability and trim of vessel are identified and allowances are made in calculations
1.5Trim, draughts and list of vessel are controlled, as required, to ensure they are suitable to progress all anticipated vessel operations

2 Control vessel stability when compartment is flooded

2.1Damage to vessel and nature of flooding of compartments is assessed
2.2Effect upon vessel stability of flooded and flooding compartments is evaluated
2.3Suitable strategy for maintaining or restoring trim and stability is devised
2.4Where stress limits of the vessel are exceeded as a consequence of damage and/or flooding, appropriate action is initiated to ensure safety of personnel, including abandoning the vessel, as required

3 Manage stress conditions of the vessel

3.1Stress levels of the vessel are assessed according to manufacturer specifications
3.2Stability of the vessel is monitored at a frequency and scope relevant to vessel operations, sufficient to enable stress and stability to be maintained within acceptable limits at all times
3.3Appropriate action is taken where weight distribution has or could exceed acceptable safety limits

4 Maintain records of stability management

4.1Data and information related to stability management is accurately recorded
4.2Data and information related to stability management is filed and stored according to organisational procedures

Performance evidence

applying International Maritime Organization (IMO) recommendations concerning vessel stability
applying relevant work health and safety (WHS)/occupational health and safety (OHS) requirements and work practices
attending to appropriate level of detail in recordkeeping
determining stability and trim requirements for docking or slipping the vessel
determining the effect on trim and stability of vessel in the event of damage to and consequent flooding of a compartment, and countermeasures to be taken
identifying vessels trim and stability factors
interpreting 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 stability
maintaining stability and stress conditions within safe limits at all times
producing accurate and reliable documentation
undertaking stability calculations, including: calculating required load distribution to achieve desired trim; calculations for change of draught, trim and heel when entering different water densities and to bilging of compartments; centre of gravity (CG) of a vessel using an inclining experiment and effect of suspended weights; changes to draught, trim and heel due to adding or removing fuel, ballast or cargo; determining required correction for height of CG for free surface effect; determining values of righting lever and construction of righting lever curves; displacement, 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 pressure; effect on stability of dry docking and grounding; hydrostatic stability of a vessel; moment of statistical stability at small angles of heel; permeability; shear force and bending moment calculations; transverse and longitudinal stability using hydrostatic data; vessel CG, centre of buoyancy and metacentre; using automatic data-based equipment.

Knowledge evidence

causes and repercussions of a heeling vessel
data and information related to stability management, including: cargo handling equipment; instructions of relevant maritime authorities; manufacturer instructions and procedures; organisational cargo handling procedures; relevant Australian and international standards and regulatory requirements; relevant WHS/OHS legislation; vessel and shore safety checklists; vessel cargo securing manual; vessel log; vessel register of materials handling equipment
effects 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 list
effects of density of sea water on the draught and freeboard of a vessel
effects of flooding on transverse stability and trim, including: calculation of vessel after flooding; cargo vessels; passenger ships
features of the load-line and draught marks of a vessel and procedures for carrying out related calculations
fundamental theories and principles of ship construction and the theories and factors that impact on trim and stability, and measures necessary to preserve trim and stability
IMO recommendations concerning vessel stability
levelling arrangements for damaged side compartments
nature of flooding, including: flooding due to collision or grounding; ingress of sea water through hatch covers or ruptured pipes
principle stresses that act on the structure of a vessel, including panting and pounding, shear force, bending moments and torsional stress
principles of parametric rolling and control methods
principles of synchronous rolling and methods for its control
procedures for calculating the required load distribution to achieve the desired trim
responsibilities under international conventions and codes, including: IMO grain regulations and grain heeling moment information; minimum stability requirements required by Load Line Rules and Intact Stability Code; passenger ship stability after damage; use of weather criterion
stability, including: dynamical; intact, including grain; statical
suitable strategies for stabilising vessels
survey and dry dock requirements
trim and list
typical problems related to the control of trim and stability for vessels of 500 gross tonnage (GT) and more
vessels trim and stability factors for: dry docking; excessive trim; free surface of a liquid; grounding; handling of heavy weights; large swell conditions; shift of cargo; wind heel
WHS/OHS requirements and work practices

Unit content sourced from training.gov.au — © Commonwealth of Australia, licensed under CC BY 4.0. Auditori is not affiliated with the Department of Employment and Workplace Relations.

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Questions about assessing MARA023

What does an assessment tool for MARA023 need to cover?

To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MARA023 needs to address all 46 unit components: 4 elements with 14 performance criteria, 10 performance evidence requirements, 22 knowledge evidence requirements, and the foundation skills. A coverage matrix mapping each question and task to these components is what an auditor looks for.

How does Auditori generate an assessment tool for MARA023?

Auditori pulls the current release of MARA023 from training.gov.au and generates a complete package: candidate assessment, assessor guide with model answers and observation criteria, and a coverage matrix mapping every component. A suitably qualified person then reviews and approves the draft in a built-in workflow — consistent with ASQA's guidance on AI use in VET — before export as branded PDF and editable Word.

Is the first assessment tool really free?

Yes. Every new account includes one free credit — enough to generate the complete assessment tool for MARA023 — with no card and no subscription required. After that it's pay-as-you-go per unit.

Can I check my existing MARA023 assessment instead of generating a new one?

Yes — upload your existing assessment or learner guide and Auditori maps it against every element, performance criterion, PE and KE of MARA023, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.

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