Unit of competency Outline

Date retreived
22/07/2026 3:25 PM AWST

Whilst all efforts are made to provide accurate and timely information from the relevant source/documentation, please be aware that the information supplied may not be the most current version. The accuracy of the detail has not been confirmed by the Department and therefore should not be relied upon without first confirming the contents.

Calculate, assess and report on vessel trim and stability

Calculate, assess and report on vessel trim and stability

Unit of competency
National Code
MARM011
State Code
AUG58
TGA Status
Deleted
DTWD Status
Deleted
Current Release Number
1.00
Current Release Date
27/02/2015
View on TGA
State Implementation and Classification
Approved Date
28/08/2015
Field of Education
031701 - Maritime Engineering
Original Release Date
28/08/2015
Nominal Hours
90
Description
This unit involves the skills and knowledge required to assess and report on vessel trim and intact stability as part of the survey function. It is limited to undertaking practical stability tests, simplified stability calculations, reporting inclining experiments and consideration of damage stability implications.This unit applies to people working in the maritime industry as a domestic commercial vessel marine surveyor and may form part of accreditation requirements for surveyors under Australian legislation.No licensing, legislative or certification requirements apply to this unit at the time of publication.
Notes
Elements and Performance Criteria
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
No information
No information
Replaces
State Code National Code Title Type
WG504 MARM5001A Calculate, assess and report on vessel trim and stability Unit of competency
State Code National Code Title Type
AVP9 MAR50215 Diploma of Maritime Operations (Marine Surveying) Qualification