Modification History
Release 1
This is the first release of this unit.
This unit replaces and is equivalent to TDMMA1007B Control trim, stability and stress.
Unit Descriptor
This unit involves the skills and knowledge required to control trim, stability and stress within safe limits at all times on a vessel 500 gross tonnage or more.
Application of the Unit
This unit applies to people working in the maritime industry as a Master Unlimited.
Licensing/Regulatory Information
Not applicable.
Pre-Requisites
Not applicable.
Employability Skills Information
This unit contains employability skills.
Elements and Performance Criteria Pre-Content
Elements describe the essential outcomes of a unit of competency. |
Performance criteria describe the required performance needed to demonstrate achievement of the element. Assessment of performance is to be consistent with the evidence guide. |
Elements and Performance Criteria
1 |
Manage vessel trim under normal operating conditions |
1.1 |
Stability analysis and weight distribution planning are conducted at a time frequency and scope appropriate to the proposed nature of the voyage and vessel operation |
1.2 |
Weight distribution is arranged to maintain vessel within acceptable stability limits for the anticipated operational situations likely to be experienced during the voyage |
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1.3 |
Calculations are made to determine the draught and centre of gravity of vessel after adding, removing or shifting weight |
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1.4 |
Factors affecting the stability and trim of vessel are identified and allowances are made in calculations |
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1.5 |
Trim, draughts and list of vessel are controlled as required to ensure they are suitable to progress all anticipated vessel operations |
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2 |
Control vessel stability when compartment is flooded |
2.1 |
Damage to vessel and nature of flooding of compartments is assessed |
2.2 |
Effect upon vessel stability of flooded and flooding compartments is evaluated |
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2.3 |
Suitable strategy for maintaining or restoring trim and stability is devised |
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2.4 |
Where 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 where necessary abandoning the vessel |
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3 |
Manage stress conditions of the vessel |
3.1 |
Stress levels of the vessel are assessed according to manufacturer specifications |
3.2 |
Stability of the vessel is monitored at a frequency and scope relevant to vessel operations and is sufficient to enable stress and stability to be maintained within acceptable limits at all times |
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3.3 |
Appropriate action is taken where weight distribution has or could exceed acceptable safety limits |
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4 |
Maintain records of stability management |
4.1 |
Data and information related to stability management is accurately recorded |
4.2 |
Data and information related to stability management is filed and stored according to organisational procedures |
Required Skills and Knowledge
This section describes the skills and knowledge required for this unit. |
Required Skills: |
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Required Knowledge: |
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Evidence Guide
The evidence guide provides advice on assessment and must be read in conjunction with the performance criteria, the required skills and knowledge, the range statement and the Assessment Guidelines for the Training Package. |
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Critical aspects for assessment and evidence required to demonstrate competency in this unit |
The evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the Elements, Performance Criteria, Required Skills, Required Knowledge and include:
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Context of and specific resources for assessment |
Performance is demonstrated consistently over time and in a suitable range of contexts. Resources for assessment include access to:
In both real and simulated environments, access is required to:
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Method of assessment |
Practical assessment must occur in an:
A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate to this unit:
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Guidance information for assessment |
Holistic assessment with other units relevant to the industry sector, workplace and job role is recommended. In all cases where practical assessment is used it should be combined with targeted questioning to assess Required Knowledge. Assessment processes and techniques must be appropriate to the language and literacy requirements of the work being performed and the capacity of the candidate. |
Range Statement
The range statement relates to the unit of competency as a whole. It allows for different work environments and situations that may affect performance. Bold italicised wording, if used in the performance criteria, is detailed below. |
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Calculations must include: |
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Factors may include: |
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Damage to vessel may include: |
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Nature of flooding may include: |
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Suitable strategy may include: |
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Data and information may include: |
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Unit Sector(s)
Not applicable.
Competency Field
Handling cargo and vessel stability