Assessor Resource

MARM4004A
Evaluate vessel stability

Assessment tool

Version 1.0
Issue Date: March 2024


This unit applies to people working in the maritime industry as a marine surveyor assistant and forms part of requirements for the Certificate IV in Domestic Commercial Vessel Survey.

This unit involves the skills and knowledge required to evaluate stability of a commercial vessel for marine survey purposes using available stability information. It covers principles of stability data and calculations, how to calculate stability and role of surveyor in assessing stability information.

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:

analysing, planning and carrying out vessel stability calculation for at least five different types and size of vessels

performing accurate and reliable calculations

attention to appropriate level of detail in recordkeeping

providing high quality reports.

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 evaluating vessel stability using available information can be conducted

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.

Method of assessment

Practical assessment must occur in an:

appropriately simulated workplace environment and/or

appropriate range of situations in the workplace.

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 evaluating vessel stability using available information

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:

Carry out calculations associated with vessel stability using basic stability criteria calculations, including interpreting and correlating resultant data

Interpret measurements and observations required when maintaining vessel stability

Read and interpret vessel specifications and drawings

Read, interpret and apply simple instructions for maintaining vessel stability

Select and use relevant equipment according to instructions

Work under supervision of a marine surveyor

Required Knowledge:

Basic stability theory, including:

equilibrium

impact of design and hull shape on stability

principles of stability

relationship between weight and buoyancy in relation to floating bodies

reserve buoyancy

terms and definitions

Difference between transverse and longitudinal stability, and causes of list and trim

Effects of density of water on draught and freeboard of vessel

Effects on vessel stability that has been bilged

Information contained in basic stability data book supplied to vessel and how this information is used to maintain vessel in a stable condition during operations

Marine Safety (Domestic Commercial Vessel) National Law

Principal design features of vessels related to stability and watertight integrity, such as:

maintenance and survey requirements necessary to maintain watertight integrity of vessel

openings in hull and on main deck of vessel and safe working practices that must be followed to maintain watertight integrity

Principal factors that affect operational stability of vessel and related measures that can be taken to maintain stability, including:

adding and removing weights

additions and alterations to vessel structure

free surface effect of slack tanks

operation of lifting equipment

roll period

stiff and tender condition

water on deck

Recording stability calculations in survey report

Relationship between lightship, loaded displacement and deadweight

Relevant work health and safety (WHS)/occupational health and safety (OHS) legislation and policies

Steps involved in bringing unstable vessel to a stable condition

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.

Basic data may include:

Certificate of survey

Vessel log

Vessel plans and drawings

Vessel stability data book

Commercial vessels must include:

Vessels defined as commercial vessels in Marine Safety (Domestic Commercial Vessel) National Law

Precautions may include:

Ballast management

Closing openings exposed to weather

Damage control measures to maintain, stabilise or restore watertight integrity of hull during an emergency

Managing distribution of load on vessel

Managing position, stowage and lashing of cargo, stores and equipment, and location of passengers

Taking precautions when using lifting equipment and associated gear

Emergency situations may include:

Flooding when there is damage to hull

Inadequate securing of weights on board

Unplanned movement of heavy items or stores and equipment on board vessel

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
Effect of basic data, information and vessel stability calculations is identified, reviewed and applied to assessment of stability 
Basic data requirements for commercial vessels are correctly identified 
Importance and function of vessel stability book on survey task is accurately explained 
Appropriate stability data and information required for size and type of vessel is identified and assessed for compliance against regulatory requirements 
Calculated stability data is correlated with the stability criteria set out in stability book and is confirmed as an accurate evaluation of vessel stability condition by surveyor 
Precautions to rectify operations that may affect stability and watertight integrity of vessel are identified and confirmed with surveyor 
Actions to ensure weight distribution does not compromise vessel safety are identified, confirmed with surveyor and incorporated into survey task as required 
Actions to be taken in anticipation of environmental changes that may affect vessel stability are identified, confirmed with surveyor and incorporated into survey task as required 
Actions to be taken in emergency situations to maintain vessel stability within safe limits are identified, confirmed with and implemented promptly and effectively 
Recorded calculations are reviewed by surveyor for accuracy and relevance 
Draft survey report is developed and reviewed with surveyor for accuracy and compliance 
Feedback provided on draft survey report is acknowledged and draft report is amended as required 
Storage and security of information is identified, and records are stored and filed according to organisational and regulatory requirements 

Forms

Assessment Cover Sheet

MARM4004A - Evaluate vessel stability
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

MARM4004A - Evaluate vessel stability

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:

Date: