Unit of Competency Mapping – Information for Teachers/Assessors – Information for Learners

MARA023 Mapping and Delivery Guide
Manage trim, stability and stress of a vessel

Version 1.0
Issue Date: May 2024


Qualification -
Unit of Competency MARA023 - Manage trim, stability and stress of a vessel
Description
Employability Skills
Learning Outcomes and Application 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 (GT) or more.This unit applies to people working in the maritime industry in the capacity of:Master of a commercial vessel Unlimited.Licensing/Regulatory InformationLegislative and regulatory requirements are applicable to this unit.This unit is one of the requirements to obtain Australian Maritime Safety Authority (AMSA) certification as a Master Unlimited and to meet regulatory requirements this unit must be delivered consistent with Marine Orders and with the relevant sections of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).Those regulatory requirements include STCW International Maritime Organization (IMO) model course competencies and areas of knowledge, understanding and proficiency, together with the estimated total hours required for lectures and practical exercises. Teaching staff should note that timings are suggestions only and should be adapted to suit individual groups of trainees depending on their experience, ability, equipment and staff available for training.
Duration and Setting X weeks, nominally xx hours, delivered in a classroom/online/blended learning setting.

Assessors must hold credentials specified within the Standards for Registered Training Organisations current at the time of assessment.

Assessment must satisfy the Principles of Assessment and Rules of Evidence and all regulatory requirements included within the Standards for Registered Training Organisations current at the time of assessment.

Assessment processes and techniques must be appropriate to the language, literacy and numeracy requirements of the work being performed and the needs of the candidate.

Practical assessment must occur in a workplace or realistic simulated workplace, under the normal range of workplace conditions.

Simulations and scenarios may be used where situations cannot be provided in the workplace or may occur only rarely, in particular for situations relating to emergency procedures and adverse weather conditions where assessment would be unsafe, impractical or may lead to environmental damage.

Resources for assessment must include access to:

applicable documentation, such as legislation, regulations, codes of practice, workplace procedures and operational manuals

tools, equipment, machinery, materials and relevant personal protective equipment (PPE) currently used in industry.
Prerequisites/co-requisites
Competency Field A – Handling cargo and vessel stability
Development and validation strategy and guide for assessors and learners Student Learning Resources Handouts
Activities 		Slides
PPT 		Assessment 1 Assessment 2 Assessment 3 Assessment 4
Elements of Competency Performance Criteria              
Element: Manage vessel trim under normal operating conditions
  • 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
       
Element: Weight distribution is arranged to maintain vessel within acceptable stability limits for the anticipated operational situations likely to be experienced during the voyage
       
Element: Calculations are made to determine the draught and centre of gravity (CG) of vessel after adding, removing or shifting weight
       
Element: Factors affecting the stability and trim of vessel are identified and allowances are made in calculations
       
Element: Trim, draughts and list of vessel are controlled, as required, to ensure they are suitable to progress all anticipated vessel operations
       
Element: Control vessel stability when compartment is flooded
  • Damage to vessel and nature of flooding of compartments is assessed
       
Element: Effect upon vessel stability of flooded and flooding compartments is evaluated
       
Element: Suitable strategy for maintaining or restoring trim and stability is devised
       
Element: 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 abandoning the vessel, as required
       
Element: Manage stress conditions of the vessel
  • Stress levels of the vessel are assessed according to manufacturer specifications
       
Element: Stability 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
       
Element: Appropriate action is taken where weight distribution has or could exceed acceptable safety limits
       
Element: Maintain records of stability management
  • Data and information related to stability management is accurately recorded
       
Element: Data and information related to stability management is filed and stored according to organisational procedures
       


Evidence Required

List the assessment methods to be used and the context and resources required for assessment. Copy and paste the relevant sections from the evidence guide below and then re-write these in plain English.

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 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.

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 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.

Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assignment, checklist) and due date here

Assessment task 1: [title]      Due date:

(add new lines for each of the assessment tasks)

Assessment Tasks

Copy and paste from the following data to produce each assessment task. Write these in plain English and spell out how, when and where the task is to be carried out, under what conditions, and what resources are needed. Include guidelines about how well the candidate has to perform a task for it to be judged satisfactory.

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

Copy and paste from the following performance criteria to create an observation checklist for each task. When you have finished writing your assessment tool every one of these must have been addressed, preferably several times in a variety of contexts. To ensure this occurs download the assessment matrix for the unit; enter each assessment task as a column header and place check marks against each performance criteria that task addresses.

Observation Checklist

Tasks to be observed according to workplace/college/TAFE policy and procedures, relevant legislation and Codes of Practice Yes No Comments/feedback
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 
 
 
 
 
Damage to vessel and nature of flooding of compartments is assessed 
 
 
 
Stress levels of the vessel are assessed according to manufacturer specifications 
 
 
Data and information related to stability management is accurately recorded 
 

Forms

Assessment Cover Sheet

MARA023 - Manage trim, stability and stress of a vessel
Assessment task 1: [title]

Student name:

Student ID:

I declare that the assessment tasks submitted for this unit are my own work.

Student signature:

Result: Competent Not yet competent

Feedback to student

 

 

 

 

 

 

 

 

Assessor name:

Signature:

Date:

Assessment Record Sheet

MARA023 - Manage trim, stability and stress of a vessel

Student name:

Student ID:

Assessment task 1: [title] Result: Competent Not yet competent

(add lines for each task)

Feedback to student:

 

 

 

 

 

 

 

 

Overall assessment result: Competent Not yet competent

Assessor name:

Signature:

Date:

Student signature:

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