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Evidence Guide: MARA017 - Maintain seaworthiness of the ship (ship 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

 

MARA017 - Maintain seaworthiness of the ship (ship stability)

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

Sample worked data is interpreted to determine ship safety parameters

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Transverse and longitudinal stability is accurately calculated using data extracted from the body of ship stability data book

Completed
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Stability calculations are checked to ensure they correlate with data set out in ship stability book

Completed
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Spurious or incorrect information is recognised and recalculated

Completed
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Trim, draughts and list are adjusted, as required

Completed
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Stability calculations are conducted at a time, frequency and scope appropriate to voyage

Completed
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Manage weight distribution

  1. Stability calculations are used to plan weight distribution to ensure assigned load line conditions are not exceeded
Stability calculations are used to plan weight distribution to ensure assigned load line conditions are not exceeded

Completed
Date:

Teacher:		 Evidence:

 

 

 

 

 

 

 

Weight distribution is controlled to maintain ship within acceptable stability and stress limits for loading operation and at all stages of voyage

Completed
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Appropriate action is taken when weight distribution is compromising ship safety

Completed
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Maintain records of stability management

  1. Data and information related to stability management is accurately recorded
Data and information related to stability management is accurately recorded

Completed
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Teacher:		 Evidence:

 

 

 

 

 

 

 

Data and information related to stability management is filed and stored according to organisational procedures

Completed
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Assessed

Teacher: ___________________________________ Date: _________

Signature: ________________________________________________

Comments:

 

 

 

 

 

 

 

 

Instructions to Assessors

Required Skills and Knowledge

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 appropriate actions to correct weight distribution, including:

amending the ship loading plan

ballast management

reduction of free surface

applying stability, trim and stress tables, diagrams and stress calculating equipment

carrying out calculations required when determining ship stability, listand trim

managing ship stability in a range of conditions

managing the loading and weight distribution of a ship to ensure assigned load line conditions are not exceeded

reading and interpreting ship specifications and design drawings

recognising problems affecting ship stability and trim

undertaking stability calculations, including:

calculation of areas under the curve

changes in draft and trim due to differing water densities

correction for free surface effect

dead weight

displacement

draft and trim

effect of slack tanks

metacentric height

moment of static stability at small angles of heel

movement of the centre of gravity

tonnes per centimetre (TPC)

transverse and longitudinal stability

values for righting levers and construction of the curve of stability.

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:

buoyancy, including:

fundamental actions to be taken in the event of partial loss of intact buoyancy

calculation of ships stability using the inclining experiment

data and information related to stability management, including:

cargo stowage and loading plan

records of stability calculations

safety management system (SMS)

stability and trim booklet

effects of angle of loll

effects of beam and form coefficient on the stability of a ship

effects of density of sea water on the draught and freeboard of a ship, including freshwater allowance and dock water allowance

effects of free surface on the stability of a ship

features of the load-line and draught marks of a ship and methods for performing related calculations

fundamentals of watertight integrity

principal stresses that act on the structure of a ship

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

problems related to the control of trim, stability and stresses of ships and appropriate actions and solutions

sections of the International Maritime Organization (IMO), International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW) and Australian Maritime Safety Authority (AMSA) Marine Orders related to intact stability criteria

stability, trim and stress tables, diagrams and stress calculating equipment

theory and calculations of ship stability and dynamics, including movement of weights

use of computer programs in calculating stability.

Range Statement

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