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Evidence Guide: MARM011 - Calculate, assess and report on vessel trim and 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

 

MARM011 - Calculate, assess and report on vessel trim and stability

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

Plan and prepare stability testing

  1. Applicable stability criteria for class of vessel and its operations are identified and confirmed against regulatory requirements
  2. Differences between Uniform Shipping Laws (USL) and National Standard for Commercial Vessels (NSCV) standards for assessing stability are identified and applied to survey plan as required
  3. Information and data is used to establish and verify stability characteristics required for safe operation
  4. Types of stability related hazards that may occur during all types of operations are identified
  5. Range of intended and/or likely vessel loading conditions are accurately identified and their impact on stability is assessed
Applicable stability criteria for class of vessel and its operations are identified and confirmed against regulatory requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Differences between Uniform Shipping Laws (USL) and National Standard for Commercial Vessels (NSCV) standards for assessing stability are identified and applied to survey plan as required

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Information and data is used to establish and verify stability characteristics required for safe operation

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Types of stability related hazards that may occur during all types of operations are identified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Range of intended and/or likely vessel loading conditions are accurately identified and their impact on stability is assessed

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Calculate vessel trim and stability

  1. Simplified stability calculations are performed to assess compliance with applicable stability criteria
  2. Stability assessment methods for equivalent solutions are applied as necessary according to regulatory requirements
  3. Trim, draughts and freeboard are measured accurately to safely and efficiently allow assessment of compliance with criteria
  4. Effects of weight distribution that may compromise vessel safety are included in stability assessment
  5. Computer-based stability programs are used as appropriate to assist with assessing compliance
  6. Results are recorded and verified to confirm compliance
  7. Appropriate methods are used to ensure vessel is not put at risk during assessment
Simplified stability calculations are performed to assess compliance with applicable stability criteria

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Stability assessment methods for equivalent solutions are applied as necessary according to regulatory requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Trim, draughts and freeboard are measured accurately to safely and efficiently allow assessment of compliance with criteria

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Effects of weight distribution that may compromise vessel safety are included in stability assessment

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Computer-based stability programs are used as appropriate to assist with assessing compliance

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Results are recorded and verified to confirm compliance

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Appropriate methods are used to ensure vessel is not put at risk during assessment

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Apply tests, assessments and theories to confirm compliance

  1. Tests and assessments that could assist to confirm stability compliance are verified and carried out according to safety instructions
  2. Small angle stability theories are used to establish metacentric height (GM) through transverse movement of weights across vessel deck
  3. Causes of inaccuracies and limitations of assumptions in tests, assessments and theories are interpreted accurately and considered in stability assessment report
Tests and assessments that could assist to confirm stability compliance are verified and carried out according to safety instructions

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Small angle stability theories are used to establish metacentric height (GM) through transverse movement of weights across vessel deck

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Causes of inaccuracies and limitations of assumptions in tests, assessments and theories are interpreted accurately and considered in stability assessment report

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Identify other impacts on stability calculations

  1. Types and effects of damage on vessel stability are identified and considered according to regulatory requirements
  2. Damage stability considerations are accurately identified and effect of damage is correctly quantified
  3. Operational impact on stability is identified and considered in compliance assessment
  4. Vessel safety management plan is reviewed to ensure known or likely impacts on stability are included
Types and effects of damage on vessel stability are identified and considered according to regulatory requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Damage stability considerations are accurately identified and effect of damage is correctly quantified

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Operational impact on stability is identified and considered in compliance assessment

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Vessel safety management plan is reviewed to ensure known or likely impacts on stability are included

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Document and report findings

  1. Records are maintained and reports are prepared according to regulatory and organisational guidelines
  2. Survey report is completed according to regulatory requirements
Records are maintained and reports are prepared according to regulatory and organisational guidelines

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Survey report is completed according to regulatory requirements

Completed
Date:

Teacher:
Evidence:

 

 

 

 

 

 

 

Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Evidence Guide

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Plan and prepare stability testing

1.1

Applicable stability criteria for class of vessel and its operations are identified and confirmed against regulatory requirements

1.2

Differences between Uniform Shipping Laws (USL) and National Standard for Commercial Vessels (NSCV) standards for assessing stability are identified and applied to survey plan as required

1.3

Information and data is used to establish and verify stability characteristics required for safe operation

1.4

Types of stability related hazards that may occur during all types of operations are identified

1.5

Range of intended and/or likely vessel loading conditions are accurately identified and their impact on stability is assessed

2

Calculate vessel trim and stability

2.1

Simplified stability calculations are performed to assess compliance with applicable stability criteria

2.2

Stability assessment methods for equivalent solutions are applied as necessary according to regulatory requirements

2.3

Trim, draughts and freeboard are measured accurately to safely and efficiently allow assessment of compliance with criteria

2.4

Effects of weight distribution that may compromise vessel safety are included in stability assessment

2.5

Computer-based stability programs are used as appropriate to assist with assessing compliance

2.6

Results are recorded and verified to confirm compliance

2.7

Appropriate methods are used to ensure vessel is not put at risk during assessment

3

Apply tests, assessments and theories to confirm compliance

3.1

Tests and assessments that could assist to confirm stability compliance are verified and carried out according to safety instructions

3.2

Small angle stability theories are used to establish metacentric height (GM) through transverse movement of weights across vessel deck

3.3

Causes of inaccuracies and limitations of assumptions in tests, assessments and theories are interpreted accurately and considered in stability assessment report

4

Identify other impacts on stability calculations

4.1

Types and effects of damage on vessel stability are identified and considered according to regulatory requirements

4.2

Damage stability considerations are accurately identified and effect of damage is correctly quantified

4.3

Operational impact on stability is identified and considered in compliance assessment

4.4

Vessel safety management plan is reviewed to ensure known or likely impacts on stability are included

5

Document and report findings

5.1

Records are maintained and reports are prepared according to regulatory and organisational guidelines

5.2

Survey report is completed according to regulatory requirements

Required Skills and Knowledge

Elements describe the essential outcomes.

Performance criteria describe the performance needed to demonstrate achievement of the element.

1

Plan and prepare stability testing

1.1

Applicable stability criteria for class of vessel and its operations are identified and confirmed against regulatory requirements

1.2

Differences between Uniform Shipping Laws (USL) and National Standard for Commercial Vessels (NSCV) standards for assessing stability are identified and applied to survey plan as required

1.3

Information and data is used to establish and verify stability characteristics required for safe operation

1.4

Types of stability related hazards that may occur during all types of operations are identified

1.5

Range of intended and/or likely vessel loading conditions are accurately identified and their impact on stability is assessed

2

Calculate vessel trim and stability

2.1

Simplified stability calculations are performed to assess compliance with applicable stability criteria

2.2

Stability assessment methods for equivalent solutions are applied as necessary according to regulatory requirements

2.3

Trim, draughts and freeboard are measured accurately to safely and efficiently allow assessment of compliance with criteria

2.4

Effects of weight distribution that may compromise vessel safety are included in stability assessment

2.5

Computer-based stability programs are used as appropriate to assist with assessing compliance

2.6

Results are recorded and verified to confirm compliance

2.7

Appropriate methods are used to ensure vessel is not put at risk during assessment

3

Apply tests, assessments and theories to confirm compliance

3.1

Tests and assessments that could assist to confirm stability compliance are verified and carried out according to safety instructions

3.2

Small angle stability theories are used to establish metacentric height (GM) through transverse movement of weights across vessel deck

3.3

Causes of inaccuracies and limitations of assumptions in tests, assessments and theories are interpreted accurately and considered in stability assessment report

4

Identify other impacts on stability calculations

4.1

Types and effects of damage on vessel stability are identified and considered according to regulatory requirements

4.2

Damage stability considerations are accurately identified and effect of damage is correctly quantified

4.3

Operational impact on stability is identified and considered in compliance assessment

4.4

Vessel safety management plan is reviewed to ensure known or likely impacts on stability are included

5

Document and report findings

5.1

Records are maintained and reports are prepared according to regulatory and organisational guidelines

5.2

Survey report is completed according to regulatory requirements

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements and performance criteria.

Analysing, planning and assessing trim and stability should be conducted for at least five different vessels varying in size and operational limits and include:

accessing and interpret a variety of information

analysing information and data

anticipating and solving problems that may occur in calculations

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

calculating trim and stability using statutory formula and criteria

carrying out and reporting on at least three inclining experiments and three lightship measurements

carrying out a range of different stability tests and assessments

collating and preparing required documentation

collecting and accurately interpreting valid and reliable data and/or regulations

developing effective planning documents

ensuring behaviour reflects relevant current legislative and regulatory requirements

identifying and correcting causes of erratic or excessive deviation in mass movements during an inclining experiment

identifying gaps in data and sourcing additional information

identifying hazards, assessing risks, and developing and implementing risk treatment options

liaising with relevant people to obtain information

reading and accurately interpreting vessel specifications and design drawings

relating effectively to people from a range of social, cultural and ethnic backgrounds

resolving conflict and negotiating effectively

selecting and using appropriate equipment

undertaking ballast management

undertaking research

using calculation and stability software.

Evidence required to demonstrate competence in this unit must be relevant to and satisfy all of the requirements of the elements, performance criteria and range of conditions and include knowledge of:

application of vessel construction principles and stability assessments applicable to a wide range of operational contexts

calculations and formulas related to determining vessel trim and stability

cargo loading and impact on stability

configuration and subdivision requirements of a typical vessel including:

collision bulkhead

down flooding

deck edge immersion

freeboard and bulkhead deck

watertight compartments

weather tight compartments

vessel bulkhead

correct identification and use of equipment and data required for stability tests and calculations

damage control measures designed to maintain, stabilise or restore hull watertight integrity

definition of intact stability

distribution of load on a vessel

implications and management of free surface effect

information and data requirements, and statutory documents such as stability book, safety management plans, certificate of operation, vessel history

naval architectural theory to the level necessary to carry out stability assessments for a range of domestic commercial vessels surveyor is intending to survey

procedures for:

carrying out an inclining experiment

determining weights to be added or subtracted from calculated displacement to determine lightship displacement

maintaining vessel security and stability

measuring draughts and or freeboard to determine displacement of a vessel i.e. carrying out a lightship measurement

recordkeeping requirements

regulatory requirements for:

calculating vessel stability

surveying vessels

vessel compliance to trim and stability

requirements for conducting a load line survey

risk management

safety management procedures and precautions when determining vessel trim and stability

simplified stability criteria as outlined in NSCV Part C6A and C6C

survey report requirements

theories relating to damage stability and precautions to be taken to ensure down-flooding or progressive flooding does not occur

typical problems and solutions related to vessel trim and stability

types of simplified stability tests

WHS/OHS legislation, policies and procedures.

Range Statement

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

Applicable stability criteria includes one of the following:

NSCV guidelines

USL Code

Regulatory requirements include one of the following:

Marine Safety (Domestic Commercial Vessel) National Law

NSCV

Information and data include one or more of the following:

cargo information

load lines

means to:

sound tanks

read draught marks

stability book

Tests and assessments include one or more of the following:

buoyancy and stability after flooding

freeboard

lightship measurement

practical inclining

roll period test

simplified stability tests

stability proof test

Types and effects of damage include one or more of the following:

added mass

flooding

large amounts of water on deck

lost buoyancy

Stability considerations include one or more of the following:

ballast management

closing openings

damage control measures to maintain, stabilise or restore watertight integrity of hull

distribution of load on a vessel

positioning of stowage and lashing of cargo, stores and equipment

taking action to avoid or minimise cargo shift

taking precautions when using lifting equipment and other associated equipment

Operational impact includes one or more of the following:

ballast

cargo

crew movement

cross connections

lifting gear (including cranes on deck)

passengers and passenger movements

towing

vessel mooring arrangements

wind/ice and other weather constraints