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Evidence Guide: MARA024 - Manage vessel stability

Student: __________________________________________________

Signature: _________________________________________________

Tips for gathering evidence to demonstrate your skills

The important thing to remember when gathering evidence is that the more evidence the better - that is, the more evidence you gather to demonstrate your skills, the more confident an assessor can be that you have learned the skills not just at one point in time, but are continuing to apply and develop those skills (as opposed to just learning for the test!). Furthermore, one piece of evidence that you collect will not usualy demonstrate all the required criteria for a unit of competency, whereas multiple overlapping pieces of evidence will usually do the trick!

From the Wiki University

 

MARA024 - Manage vessel stability

What evidence can you provide to prove your understanding of each of the following citeria?

Data is interpreted to determine safety parameters for vessel

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Stability is accurately calculated using data extracted from vessel stability data book

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Stability calculations are checked to ensure they correlate with data set out in vessel stability book

Completed
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Miscalculations or unsafe conditions are recognised and recalculated or checked

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Calculated stability data is recorded using appropriate units and correct number of significant figures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Control vessel stress and stability

  1. Information from vessel stability information is used to determine loading limits and displacement from draft
Information from vessel stability information is used to determine loading limits and displacement from draft

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Vessel 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

Completed
Date:

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Relevant stability information is correctly communicated to others, as required

Completed
Date:

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Stability conditions of vessel are managed in adverse weather conditions

Completed
Date:

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Emergencies that may jeopardise vessel stability are recognised and appropriate actions taken

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Maintain records of stability management

  1. Data and information related to stability management is accurately recorded
Data and information related to stability management is accurately recorded

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Data and information related to stability management is filed and stored according to organisational procedures

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

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:

attending to appropriate level of detail in recordkeeping

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

trim

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

checking calculations to ensure correlation against stability book data

managing loading and weight distribution of vessel to ensure assigned load line conditions are not exceeded.

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:

bilging and permeability

centroids and CG

change of draught and trim (MCT)

conditions of stable, neutral and unstable equilibrium and effects of disturbing vessel from upright

construction features and stress characteristics for vessels

density and specific gravity

dock water and freshwater allowance

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

forces and moments

information contained in stability data books

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

procedures for carrying out basic calculations associated with vessel stability

relationship between light displacement, loaded displacement and deadweight tonnage

stability curves

stability of vessel in a range of conditions

stability terms and definitions

steps involved in bringing an unstable vessel to a stable condition

stress calculations

tonnes per centimetre (TPC) immersion

transverse and longitudinal dynamics

trim and stress tables

work health and safety (WHS)/occupational health and safety (OHS) requirements and work practices.

Range Statement

Range is restricted to essential operating conditions and any other variables essential to the work environment.