MARL6008A - Apply advanced principles of naval architecture
Assessor Resource
MARL6008A Apply advanced principles of naval architecture
Assessment tool
Version 1.0 Issue Date: April 2024
This unit applies to the work of a Marine Engineer Class 1 on commercial vessels of unlimited propulsion power and forms part of the requirements for the Certificate of Competency Marine Engineer Class 1 issued by the Australian Maritime Safety Authority (AMSA).
This unit involves the skills and knowledge required to perform complex calculations related to the seaworthiness of commercial vessels, including those dealing with vessel stability, trim, fuel consumption, buoyancy, vessel strength and vibration.
You may want to include more information here about the target group and the purpose of the assessments (eg formative, summative, recognition)
Prerequisites
Not applicable.
Employability Skills
This unit contains employability skills.
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.
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.
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:
making accurate and reliable calculations
solving problems using appropriate laws and principles.
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:
industry-approved marine operations site where advanced principles of naval architecture can be applied
vessel diagrams and specifications and other information required for mathematical calculations related to shipboard areas and volumes, vessel displacement, ship dimensions, centre of gravity, vessel speed, fuel consumption and hydrostatic pressure
technical reference library with current publications on naval architecture
tools, equipment and personal protective equipment currently used in industry
relevant regulatory and equipment documentation that impacts on work activities
range of relevant exercises, case studies and/or other simulated practical and knowledge assessments
appropriate range of relevant operational situations in the workplace.
In both real and simulated environments, access is required to:
relevant and appropriate materials and equipment
applicable documentation including workplace procedures, regulations, codes of practice and operation manuals.
A range of assessment methods should be used to assess practical skills and knowledge. The following examples are appropriate to this unit:
direct observation of the candidate applying advanced principles of naval architecture
direct observation of the candidate applying relevant WHS/OHS requirements and work practices.
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.
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.
Required Skills:
Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices
Explain advanced principles of naval architecture
Identify and apply relevant mathematical formulas and techniques to solve complex problems related to speed, fuel consumption and stability of commercial vessels
Identify and interpret numerical and graphical information, and perform mathematical calculations related to shipboard areas and volumes, vessel displacement, ship dimensions, centre of gravity, vessel speed, fuel consumption and hydrostatic pressure
Identify, collate and process information required to perform calculations related to speed, fuel consumption and stability of commercial vessels
Impart knowledge and ideas through verbal, written and visual means
Read and interpret written information needed to perform calculations related to seaworthiness of commercial vessels
Use calculators to perform complex mathematical calculations
Required Knowledge:
Buoyancy
Centre of gravity – KG, VCG and LCG
Centre of gravity calculations
Density correction formula
Dynamical stability
Fuel consumption calculations
Hydrostatic pressure
Principle of displacement
Principle structural members of a ship and the proper names of the various parts
Rudders
Ship:
displacement
measurements
resistance
stability
stability calculations
Shipboard:
areas
volumes
Ship form coefficients
Simpson’s Rules
Stability problems
Tonnes per centimetre immersion (TPC)
Trim and stress tables, diagrams and stress calculating equipment
Vessel speed calculations
Vibration
Work health and safety (WHS)/occupational health and safety (OHS) requirements and work practices
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.
Ship form coefficients may include:
Block coefficient
Midship section area coefficient
Prismatic coefficient
Waterplane area coefficient
Key points may include:
Maximum GZ value and angle of occurrence
Points of vanishing stability
Range of positive stability
Causes may include:
Action of the sea
Fluctuating forces on propeller
Operation of deck machinery
Out-of-balance forces in main or auxiliary machinery
Propeller-hull interaction
Adverse effects may include:
Discomfort to passengers and crew
Failure of equipment
Structural failure
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 (Mid-Ordinate) First Rule and Second Rule, with typical applications, using half and full ordinates is explained
Areas of water planes, bulkheads and elemental areas are calculated
Problems of immersed hull volume, appendage volumes and non-standard tank volumes are solved
Archimedes Principles of buoyancy are explained
TPC with application of Simpson’s Rules to find displacement is explained
Change in draught with mass addition and removal using TPC to give parallel sinkage or rise is explained
Problems of vessel displacement given water plane areas or TPC values are solved
TPC curves and displacement curves for given values are constructed
Ship form coefficients and their uses are defined
Coefficients are calculated given underwater form particulars
Problems of ship form coefficients following change in length and draught are solved
Load line freeboard measurement and markings required for change in fluid density are explained
Formula for change in mean draft due to change in density is derived
Change in draft between fluids of two densities are calculated
Formula to derive fresh water allowance is applied
Changes in mean draft due to changes in density and loading are calculated
Calculations are performed to solve problems associated with adding, removing and transferring masses on ships
Centre of gravity of a suspended mass is explained
Calculations are performed to solve problems associated with suspended masses
How KG and LCG can be obtained from stability information is explained
Creation of overturning moments by mass addition, removal or transfer transversely, including cargo shift or loss is explained
Calculations are performed to solve problems of small angle transverse stability
Purpose of inclining experiments, weighing tests and roll period tests to determine stability characteristics are explained
Calculations are performed to solve problems associated with inclining experiments and roll period tests
Principles of free surface loss of GM are explained
KG solid is differentiated from KG fluid
Second moment of area is applied to obtain free surface moment of inertia and is related to stability criteria for standard conditions
Problems of liquid free surface for simple and complex geometry compartments including variation in filling rates are solved
Wall-sided formula and factors that lead to negative GM creating an angle of loll are explained
Problems involving correction of loll angle are solved
How GZ and KN righting levers are obtained from cross curves of stability is explained
KN values are converted to GZ
Dynamical stability is explained
IMO requirements for intact and damaged stability cases as well as different vessel types, using typical values from stability files are applied
Problems of large angle transverse stability, including changes due to redistribution of mass on board are solved and results against IMO requirements are evaluated
Graphical solutions to large angle transverse stability problems identifying key points are prepared
Importance of area and volume centroids is explained
Methods of determining KB, LCB, LCF and bulkhead area centroids are explained
Calculations are performed to determine centroids of shipboard areas and volumes
Impact of hydrostatic pressure and load on vertical and horizontal surfaces is explained
Methods of calculating pressure, load, shear force and bending moment diagrams for typical tank structures are applied
Problems are solved in hydrostatics relating to pressure and loads on ship structures, including graphical solution of shear force diagrams of rectangular bulkheads and their elemental stiffeners
Effective weld area of bulkhead attachment is calculated
Meaning of trim and how trim occurs is explained
Standard trimming moments resulting from mass addition, removal, transfer, flooding or combinations of these factors are explained
Change of trim is calculated using MCT1cm, GML and BML
Problems of applied trimming moments to determine final vessel draughts are solved
True mean draft is differentiated from apparent mean draft by applying correction for layer
Calculations are performed to solve problems associated with true mean draft
Problems of combined trim and transverse stability from typical fluid transfer in both a longitudinal and transverse direction are solved
Problems of fuel consumption are solved using the admiralty coefficient for various speed indexes
Optimum vessel speed for combined propulsive and auxiliary fuel consumptions is determined
Calculations are performed to show relationships between fuel consumption and displacement
Calculations are performed to show relationships between daily fuel consumption and speed
Calculations are performed to show relationships between voyage consumption, speed and distance travelled
Distribution of concentrated and point masses, buoyancy, load, shear force and bending moments are explained using simple loaded beam principles
Calculations and diagrams are used to solve problems involving loaded conditions of simple box-shaped vessels, identifying location and value of maximum shear force and bending moments
Empirical formula is applied to solve problems involving bending and direct stress in beams
Causes and adverse effects of ship vibration are explained
Natural hull vibration is explained
Schlick formula is applied to determine natural frequency of ship hull vibrations
Ways of preventing or reducing local vibration are identified
Calculations are performed to solve problems of lost buoyancy and sinkage into homogeneous mud due to tide fall with insufficient under keel clearance
Calculations are performed to solve problems of simple box-shaped and standard hull forms involving change in trim due to flooding end compartments
Types of rudders in use on ships are outlined
Reasons for using balanced rudders are identified
Application of force acting normal to a rudder surface (Fn), its components and the influence of Propeller Race Effect is explained
Rudder Centre of Effort for ahead and astern conditions is obtained to determine torque on rudder stock for conventional rudders or equivalent twisting moment (ETM) for spade rudders
Calculations are performed involving simple and complex rudder shapes to calculate speed limitations ahead and astern for stated safety factor and material properties
Calculations are performed involving simple and complex rudder shapes to determine rudder stock and coupling bolt diameters
Forms
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MARL6008A - Apply advanced principles of naval architecture
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Assessment Record Sheet
MARL6008A - Apply advanced principles of naval architecture
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