Assessor Resource

MARL017
Apply intermediate principles of naval architecture

Assessment tool

Version 1.0
Issue Date: March 2024


This unit involves the skills and knowledge required to perform intermediate calculations related to the seaworthiness of commercial vessels, including those dealing with vessel stability, fuel consumption, power and symmetrical flooding.

This unit applies to the work of a Marine Engineers Class 2 and forms part of the requirements for the Certificate of Competency Marine Engineer Class 2 issued by the Australian Maritime Safety Authority (AMSA).

No licensing, legislative or certification requirements apply to this unit at the time of publication.

You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)



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.

Elements describe the essential outcomes.

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

1

Calculate shipboard areas, volumes and displacement

1.1

Simpson’s Rules are applied to find typical and non-conforming shipboard areas

1.2

Simpson’s Rules are applied to calculate water plane areas or transverse sectional areas to determine underwater volumes

1.3

Simpson’s Rules are applied to immersed tonnes per centimetre values to determine displacement

1.4

Tonnes per centimetre is applied to determine change in mean draught due to addition or removal of mass

2

Calculate coefficients of form and changes in draught associated with fluid density

2.1

Application of coefficients of form are identified and explained

2.2

Problems are solved involving coefficients of form

2.3

Impact of hull modification on hull form coefficients is explained

2.4

Problems of coefficients of form are solved following change in length by mid body insertion/removal

2.5

Relationship between underwater volume/draught and fluid density is explained

2.6

Application of freeboard markings for Load Line Rules is explained

2.7

Density correction formula is defined

2.8

Change in mean draught due to change in density is calculated

3

Solve stability problems

3.1

Effects of adding, removing and transferring mass on board or from a vessel are explained

3.2

Calculations are performed to solve problems involving suspended masses

3.3

Positive, neutral and negative stability are distinguish from each other

3.4

How centre of gravity is calculated for redistribution, addition and/or removal of masses is explained, including the use of derricks

3.5

Problems are solved involving vertical and horizontal movement of masses to calculate KG and GM for typical vessel loaded conditions, together with true shift in vessel centre of gravity between specified conditions and small angle transverse stability

3.6

Vessel righting moment and GZ are explained

3.7

Calculations are performed to solve problems of small angle transverse stability

3.8

Purpose of an Inclining Experiment is explained

3.9

Formula for determining initial stability characteristics is applied

3.10

Calculations are performed to solve problems using Inclining Experiments

4

Calculate loss of transverse stability due to fluid free surface

4.1

Principles of liquid free surface are explained

4.2

Principles of metacentric height are explained

4.3

Centre of gravity solid is distinguished from centre of gravity fluid

4.4

Application of the second moment of area using parallel axis theorem to obtain free surface moment of inertia and use of density correction between vessel and free surface fluids is explained

4.5

Calculations are performed to solve problems of liquid free surface for simple compartments, including correction for free surface on metacentric height [GM] and fluid mass on centre of gravity [KG]

5

Calculate centroids and solve problems of hydrostatics

5.1

Importance of area and volume centroids and methods of determining KG, LCF, LCB and bulkhead area centroids is explained

5.2

Calculations are performed to solve problems related to area and volume centroids

5.3

Methods of calculating pressures and loads on typical tank structures for different filling rates, accidental flooding or tank testing are explained

5.4

Use of flat panel stiffeners and shear force reactions applicable to vertical bulkheads is explained

5.5

Calculations are performed to solve problems in hydrostatics relating to pressure and loads on ship structures, including bulkheads, stiffeners and shear forces

6

Solve problems involving propellers and powering

6.1

Factors that influence the speed of advance are explained

6.2

Calculations are performed to solve problems of single screw vessels

6.3

Relationships between propulsive coefficient, quasi propulsive coefficient and related powers together with typical values of losses for transmission, hull and propeller are explained

6.4

Components of hull resistance are explained

6.5

Calculations are performed to show impact of resistance augmentation and thrust deduction factors on powering of full size vessels

6.6

Causes, effects and methods of reducing cavitation are explained

7

Calculate voyage and daily fuel consumptions

7.1

Admiralty coefficient for fuel consumption is stated taking account of values for ship speed, shaft power and displacement

7.2

Vessel fuel consumption is calculated using admiralty coefficient

7.3

Calculations are performed to show relationship between fuel consumption and displacement

7.4

Calculations are performed to show relationship between daily fuel consumption and speed

7.5

Calculations are performed to show relationship between voyage consumption, speed and distance travelled

7.6

Voyage and daily fuel consumption are calculated taking into account propulsion, domestic loads and fuel reserve requirements

8

Solve problems related to symmetrical flooding

8.1

Volume lost-volume gained relationship for flooded compartments is explained

8.2

Modified volume lost by compartment subdivision is explained using a horizontal flat

8.3

Modified volume lost by compartment permeability is explained, including consideration of cargo stowage factor and relative density details

8.4

Problems of symmetrical flooding of simple box-shaped and standard hull forms involving flooding above and below horizontal subdivisions and different permeabilities are solved

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 on at least one occasion and include:

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

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

identifying and applying relevant mathematical formulas and techniques to solve problems related to speed, fuel consumption and stability of commercial vessels

identifying and interpreting numerical and graphical information, and performing mathematical calculations related to shipboard areas and volumes, vessel displacement, ship dimensions, centre of gravity, vessel speed and fuel consumption

identifying, collating and processing information required to perform calculations related to speed, fuel consumption and stability of commercial vessels

imparting knowledge and ideas through oral, written and visual means

reading and interpreting written information needed to perform calculations related to the seaworthiness of commercial vessels

solving problems using appropriate laws and principles

using calculators in performing accurate and reliable mathematical calculations.

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:

admiralty and fuel coefficients

buoyancy

centre of gravity:

KG, VCG and LCG

calculations

density correction formula

displacement

draught alterations

fuel consumption calculations

hydrostatic pressure

intermediate principles of naval architecture

metacentre

principle of displacement

propellers and powering

ship:

displacement

measurements

stability

stability calculations

shipboard areas

shipboard volumes

Simpson’s Rules

structural members of a ship and the proper names of various parts

symmetrical flooding

tonnes per centimetre immersion (TPC)

traverse stability

trim and stress tables, diagrams and stress calculating equipment

vessel speed calculations

watertight integrity

WHS/OHS requirements and work practices.

Assessors must satisfy National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) assessor requirements.

Assessment must satisfy the National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) standards.

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.

Assessment must occur in workplace operational situations or where these are not available, in simulated workplace operational situations or an industry-approved marine operations site that replicates workplace conditions where intermediate principles of naval architecture can be applied.

Resources for assessment include access to:

applicable documentation including workplace procedures, regulations, codes of practice and operation manuals

appropriate range of relevant operational situations in the workplace

technical reference library with current publications on naval architecture

tools, equipment, materials and personal protective equipment currently used in industry

vessel diagrams and specifications and other information required for mathematical calculations related to shipboard areas and volumes, vessel displacement, centre of gravity, vessel speed, fuel consumption, vessel stability, power and symmetrical flooding.

Performance should be demonstrated consistently over time and in a suitable range of contexts.


Submission Requirements

List each assessment task's title, type (eg project, observation/demonstration, essay, assingnment, 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.

Elements describe the essential outcomes.

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

1

Calculate shipboard areas, volumes and displacement

1.1

Simpson’s Rules are applied to find typical and non-conforming shipboard areas

1.2

Simpson’s Rules are applied to calculate water plane areas or transverse sectional areas to determine underwater volumes

1.3

Simpson’s Rules are applied to immersed tonnes per centimetre values to determine displacement

1.4

Tonnes per centimetre is applied to determine change in mean draught due to addition or removal of mass

2

Calculate coefficients of form and changes in draught associated with fluid density

2.1

Application of coefficients of form are identified and explained

2.2

Problems are solved involving coefficients of form

2.3

Impact of hull modification on hull form coefficients is explained

2.4

Problems of coefficients of form are solved following change in length by mid body insertion/removal

2.5

Relationship between underwater volume/draught and fluid density is explained

2.6

Application of freeboard markings for Load Line Rules is explained

2.7

Density correction formula is defined

2.8

Change in mean draught due to change in density is calculated

3

Solve stability problems

3.1

Effects of adding, removing and transferring mass on board or from a vessel are explained

3.2

Calculations are performed to solve problems involving suspended masses

3.3

Positive, neutral and negative stability are distinguish from each other

3.4

How centre of gravity is calculated for redistribution, addition and/or removal of masses is explained, including the use of derricks

3.5

Problems are solved involving vertical and horizontal movement of masses to calculate KG and GM for typical vessel loaded conditions, together with true shift in vessel centre of gravity between specified conditions and small angle transverse stability

3.6

Vessel righting moment and GZ are explained

3.7

Calculations are performed to solve problems of small angle transverse stability

3.8

Purpose of an Inclining Experiment is explained

3.9

Formula for determining initial stability characteristics is applied

3.10

Calculations are performed to solve problems using Inclining Experiments

4

Calculate loss of transverse stability due to fluid free surface

4.1

Principles of liquid free surface are explained

4.2

Principles of metacentric height are explained

4.3

Centre of gravity solid is distinguished from centre of gravity fluid

4.4

Application of the second moment of area using parallel axis theorem to obtain free surface moment of inertia and use of density correction between vessel and free surface fluids is explained

4.5

Calculations are performed to solve problems of liquid free surface for simple compartments, including correction for free surface on metacentric height [GM] and fluid mass on centre of gravity [KG]

5

Calculate centroids and solve problems of hydrostatics

5.1

Importance of area and volume centroids and methods of determining KG, LCF, LCB and bulkhead area centroids is explained

5.2

Calculations are performed to solve problems related to area and volume centroids

5.3

Methods of calculating pressures and loads on typical tank structures for different filling rates, accidental flooding or tank testing are explained

5.4

Use of flat panel stiffeners and shear force reactions applicable to vertical bulkheads is explained

5.5

Calculations are performed to solve problems in hydrostatics relating to pressure and loads on ship structures, including bulkheads, stiffeners and shear forces

6

Solve problems involving propellers and powering

6.1

Factors that influence the speed of advance are explained

6.2

Calculations are performed to solve problems of single screw vessels

6.3

Relationships between propulsive coefficient, quasi propulsive coefficient and related powers together with typical values of losses for transmission, hull and propeller are explained

6.4

Components of hull resistance are explained

6.5

Calculations are performed to show impact of resistance augmentation and thrust deduction factors on powering of full size vessels

6.6

Causes, effects and methods of reducing cavitation are explained

7

Calculate voyage and daily fuel consumptions

7.1

Admiralty coefficient for fuel consumption is stated taking account of values for ship speed, shaft power and displacement

7.2

Vessel fuel consumption is calculated using admiralty coefficient

7.3

Calculations are performed to show relationship between fuel consumption and displacement

7.4

Calculations are performed to show relationship between daily fuel consumption and speed

7.5

Calculations are performed to show relationship between voyage consumption, speed and distance travelled

7.6

Voyage and daily fuel consumption are calculated taking into account propulsion, domestic loads and fuel reserve requirements

8

Solve problems related to symmetrical flooding

8.1

Volume lost-volume gained relationship for flooded compartments is explained

8.2

Modified volume lost by compartment subdivision is explained using a horizontal flat

8.3

Modified volume lost by compartment permeability is explained, including consideration of cargo stowage factor and relative density details

8.4

Problems of symmetrical flooding of simple box-shaped and standard hull forms involving flooding above and below horizontal subdivisions and different permeabilities are solved

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

Shipboard areas include one or more of the following:

bulkheads

elemental areas

water planes

Coefficients of form include one or more of the following:

block coefficient

midship section area coefficient

prismatic coefficient

waterplane area coefficient

Centre of gravity must include:

centre of gravity (KG)

longitundal centre of gravity (LCG)

vertical centre of gravity (VCG)

Speed of advance must include:

apparent and true slips

Taylor wake fraction

theoretical, apparent and true speeds

wake speed

Related powers must include:

delivered

effective

indicated

shaft

thrust

Hull resistance must include:

frictional

residuary

total

Shipboard areas include one or more of the following:

bulkheads

elemental areas

water planes

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 on at least one occasion and include:

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

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

identifying and applying relevant mathematical formulas and techniques to solve problems related to speed, fuel consumption and stability of commercial vessels

identifying and interpreting numerical and graphical information, and performing mathematical calculations related to shipboard areas and volumes, vessel displacement, ship dimensions, centre of gravity, vessel speed and fuel consumption

identifying, collating and processing information required to perform calculations related to speed, fuel consumption and stability of commercial vessels

imparting knowledge and ideas through oral, written and visual means

reading and interpreting written information needed to perform calculations related to the seaworthiness of commercial vessels

solving problems using appropriate laws and principles

using calculators in performing accurate and reliable mathematical calculations.

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:

admiralty and fuel coefficients

buoyancy

centre of gravity:

KG, VCG and LCG

calculations

density correction formula

displacement

draught alterations

fuel consumption calculations

hydrostatic pressure

intermediate principles of naval architecture

metacentre

principle of displacement

propellers and powering

ship:

displacement

measurements

stability

stability calculations

shipboard areas

shipboard volumes

Simpson’s Rules

structural members of a ship and the proper names of various parts

symmetrical flooding

tonnes per centimetre immersion (TPC)

traverse stability

trim and stress tables, diagrams and stress calculating equipment

vessel speed calculations

watertight integrity

WHS/OHS requirements and work practices.

Assessors must satisfy National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) assessor requirements.

Assessment must satisfy the National Vocational Education and Training Regulator (NVR)/Australian Quality Training Framework (AQTF) standards.

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.

Assessment must occur in workplace operational situations or where these are not available, in simulated workplace operational situations or an industry-approved marine operations site that replicates workplace conditions where intermediate principles of naval architecture can be applied.

Resources for assessment include access to:

applicable documentation including workplace procedures, regulations, codes of practice and operation manuals

appropriate range of relevant operational situations in the workplace

technical reference library with current publications on naval architecture

tools, equipment, materials and personal protective equipment currently used in industry

vessel diagrams and specifications and other information required for mathematical calculations related to shipboard areas and volumes, vessel displacement, centre of gravity, vessel speed, fuel consumption, vessel stability, power and symmetrical flooding.

Performance should be demonstrated consistently over time and in a suitable range of contexts.

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
Simpson’s Rules are applied to find typical and non-conforming shipboard areas 
Simpson’s Rules are applied to calculate water plane areas or transverse sectional areas to determine underwater volumes 
Simpson’s Rules are applied to immersed tonnes per centimetre values to determine displacement 
Tonnes per centimetre is applied to determine change in mean draught due to addition or removal of mass 
Application of coefficients of form are identified and explained 
Problems are solved involving coefficients of form 
Impact of hull modification on hull form coefficients is explained 
Problems of coefficients of form are solved following change in length by mid body insertion/removal 
Relationship between underwater volume/draught and fluid density is explained 
Application of freeboard markings for Load Line Rules is explained 
Density correction formula is defined 
Change in mean draught due to change in density is calculated 
Effects of adding, removing and transferring mass on board or from a vessel are explained 
Calculations are performed to solve problems involving suspended masses 
Positive, neutral and negative stability are distinguish from each other 
How centre of gravity is calculated for redistribution, addition and/or removal of masses is explained, including the use of derricks 
Problems are solved involving vertical and horizontal movement of masses to calculate KG and GM for typical vessel loaded conditions, together with true shift in vessel centre of gravity between specified conditions and small angle transverse stability 
Vessel righting moment and GZ are explained 
Calculations are performed to solve problems of small angle transverse stability 
Purpose of an Inclining Experiment is explained 
Formula for determining initial stability characteristics is applied 
Calculations are performed to solve problems using Inclining Experiments 
Principles of liquid free surface are explained 
Principles of metacentric height are explained 
Centre of gravity solid is distinguished from centre of gravity fluid 
Application of the second moment of area using parallel axis theorem to obtain free surface moment of inertia and use of density correction between vessel and free surface fluids is explained 
Calculations are performed to solve problems of liquid free surface for simple compartments, including correction for free surface on metacentric height [GM] and fluid mass on centre of gravity [KG] 
Importance of area and volume centroids and methods of determining KG, LCF, LCB and bulkhead area centroids is explained 
Calculations are performed to solve problems related to area and volume centroids 
Methods of calculating pressures and loads on typical tank structures for different filling rates, accidental flooding or tank testing are explained 
Use of flat panel stiffeners and shear force reactions applicable to vertical bulkheads is explained 
Calculations are performed to solve problems in hydrostatics relating to pressure and loads on ship structures, including bulkheads, stiffeners and shear forces 
Factors that influence the speed of advance are explained 
Calculations are performed to solve problems of single screw vessels 
Relationships between propulsive coefficient, quasi propulsive coefficient and related powers together with typical values of losses for transmission, hull and propeller are explained 
Components of hull resistance are explained 
Calculations are performed to show impact of resistance augmentation and thrust deduction factors on powering of full size vessels 
Causes, effects and methods of reducing cavitation are explained 
Admiralty coefficient for fuel consumption is stated taking account of values for ship speed, shaft power and displacement 
Vessel fuel consumption is calculated using admiralty coefficient 
Calculations are performed to show relationship between fuel consumption and displacement 
Calculations are performed to show relationship between daily fuel consumption and speed 
Calculations are performed to show relationship between voyage consumption, speed and distance travelled 
Voyage and daily fuel consumption are calculated taking into account propulsion, domestic loads and fuel reserve requirements 
Volume lost-volume gained relationship for flooded compartments is explained 
Modified volume lost by compartment subdivision is explained using a horizontal flat 
Modified volume lost by compartment permeability is explained, including consideration of cargo stowage factor and relative density details 
Problems of symmetrical flooding of simple box-shaped and standard hull forms involving flooding above and below horizontal subdivisions and different permeabilities are solved 

Forms

Assessment Cover Sheet

MARL017 - Apply intermediate principles of naval architecture
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Assessment Record Sheet

MARL017 - Apply intermediate principles of naval architecture

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

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