MARA024 — Manage vessel stability
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What an assessment for MARA024 must cover
68 assessable components: 3 elements (13 performance criteria), 12 performance evidence and 43 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 Calculate stability
- 1.1Vessel stability data book is made available and checked for endorsement
- 1.2Data is interpreted to determine safety parameters for vessel
- 1.3Stability is accurately calculated using data extracted from vessel stability data book
- 1.4Stability calculations are checked to ensure they correlate with data set out in vessel stability book
- 1.5Miscalculations or unsafe conditions are recognised and recalculated or checked
- 1.6Calculated stability data is recorded using appropriate units and correct number of significant figures
2 Control vessel stress and stability
- 2.1Information from vessel stability data is used to determine loading limits and displacement from draft
- 2.2Vessel weight distribution is managed to maintain stability condition within safe limits at all times and regulatory requirements are complied with under all conditions of loading
- 2.3Relevant stability information is correctly communicated to others, as required
- 2.4Stability conditions of vessel are managed in adverse weather conditions
- 2.5Emergencies that may jeopardise vessel stability are recognised and appropriate actions taken
3 Maintain records of stability management
- 3.1Data and information related to stability management is accurately recorded
- 3.2Data and information related to stability management is filed and stored according to organisational procedures
Performance evidence
- carrying out basic calculations associated with maintaining vessel stability which must include:
- dock water and freshwater allowance
- draft
- final height of the centre of gravity (CG) above the keel of a vessel
- final position of the longitudinal centre of gravity (LCG)
- free surface effect and vertical distance between keel and CG adjusted for free surface effect (CGf)
- metacentric height (GM) and GM adjusted for free surface effect (GMf)
- righting moments
- trim
- checking calculations to ensure correlation against stability book data
- maintaining stability management record keeping in accordance with organisational procedures
- managing loading and weight distribution of vessel to ensure assigned load line conditions are not exceeded
Knowledge evidence
- bilging and permeability
- calculations associated with vessel stability including:
- centroids and CG
- change of draught and trim (MCT)
- density and specific gravity
- dock water and freshwater allowance
- draft calculations
- free surface effect and vertical distance between keel and CG adjusted for free surface effect (CGf)
- forces and moments calculations
- longitudinal centre of gravity (LCG)
- metacentric height (GM) and GM adjusted for free surface effect (GMf)
- righting moments
- stress calculations
- tonnes per centimetre (TPC) immersion
- trim calculations including use of trim and stress tables
- conditions of stable, neutral and unstable equilibrium and effects of disturbing vessel from upright
- construction features and stress characteristics for vessels
- effects of free surface of liquids
- emergencies including:
- adverse weather and water conditions
- any other emergency identified by risk assessment that may affect stability
- cargo shift
- damaged hull
- flooding of cargo spaces
- factors that affect the rolling period of vessel
- loading and discharging weights
- loading limits including:
- not exceeding allowable passenger carrying capacity and distribution
- not exceeding cargo carrying capacity of the vessel
- the effect of fuel, freshwater and ballast on cargo carrying capacity
- maintenance of stability during firefighting operations
- principal stresses that act on the structure of a vessel
- principles of vessel stability
- problems affecting vessel stability
- relationship between light displacement, loaded displacement and deadweight tonnage
- stability curves
- stability management record management including:
- information contained in stability data books
- stability of vessel in a range of conditions
- stability terms and definitions
- steps involved in bringing an unstable vessel to a stable condition
- transverse and longitudinal dynamics
- work health and safety (WHS)/occupational health and safety (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 MARA024
What does an assessment tool for MARA024 need to cover?
To satisfy the Principles of Assessment and Rules of Evidence, an assessment for MARA024 needs to address all 68 unit components: 3 elements with 13 performance criteria, 12 performance evidence requirements, 43 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 MARA024?
Auditori pulls the current release of MARA024 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 MARA024 — with no card and no subscription required. After that it's pay-as-you-go per unit.
Can I check my existing MARA024 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 MARA024, showing exactly what's covered and what's missing. Mapping costs a quarter of a credit.
Related units
- MARA011 — Contribute to basic operations of ships in polar waters
- MARA012 — Contribute to basic cargo operations on liquefied gas tankers
- MARA013 — Contribute to basic cargo operations on oil and chemical tankers (basic oil and chemical)
- MARA014 — Contribute to basic operations of a ship subject to IGF Code
- MARA015 — Contribute to safe anchor handling and towing operations
- MARA016 — Contribute to safe cargo operations on offshore support vessels
- MARA017 — Maintain seaworthiness of the ship (ship stability)
- MARA018 — Manage advanced chemical tanker cargo operations
- MARA019 — Manage advanced liquefied gas tanker cargo operations
- MARA020 — Manage advanced oil tanker cargo operations
- MARA021 — Manage advanced operations of a ship subject to IGF Code
- MARA022 — Manage loading, discharging and stowing of cargo
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