26090 version 1
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Demonstrate knowledge of trim and stability variation on vessels
Level
4
Credits
5
Purpose
People credited with this unit standard are able to demonstrate knowledge of
trim and stability variation on vessels.
Subfield
Boating Industries
Domain
Boatbuilding
Status
Registered
Status date
21 May 2010
Date version published
21 May 2010
Planned review date
31 December 2014
Entry information
Open.
Accreditation
Evaluation of documentation and visit by NZQA and
industry.
Standard setting body (SSB)
Boating Industry Training Organisation.
Accreditation and Moderation Action Plan (AMAP) reference
0136
This AMAP can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
None.
 New Zealand Qualifications Authority 2016
26090 version 1
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Elements and performance criteria
Element 1
Demonstrate knowledge of trim and stability variation on vessels.
Performance criteria
1.1
Static stability and trim are explained in fore and aft terms.
Range
1.2
Static stability and trim are explained in transverse terms.
Range
1.3
includes but is not limited to – moments to trim, position of
longitudinal centre of gravity, position of longitudinal centre of
buoyancy, variation of the position of the centre of gravity,
potential effects of as built variations from design.
includes but is not limited to – righting moment, down flooding
angle, GZ curve, initial stability, ultimate stability, variation of the
position of the centre of gravity, potential effects of as built
variations from design.
Weight per mm immersion is calculated for a vessel. The use of the calculation
is explained in terms of determining the effect extra weight will have on where a
boat floats.
Range
calculation is based on waterplane area.
1.4
Stability is explained in terms of free water effect.
1.5
Stability effects of loading are explained in fore and aft, transverse, and vertical
terms.
1.6
Potential implications of shifting passenger and freight movements are
explained for three given scenarios.
Please note
Providers must be accredited by NZQA, or an inter-institutional body with delegated
authority for quality assurance, before they can report credits from assessment against
unit standards or deliver courses of study leading to that assessment.
Industry Training Organisations must be accredited by NZQA before they can register
credits from assessment against unit standards.
Accredited providers and Industry Training Organisations assessing against unit standards
must engage with the moderation system that applies to those standards.
 New Zealand Qualifications Authority 2016
26090 version 1
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Accreditation requirements and an outline of the moderation system that applies to this
standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The
AMAP also includes useful information about special requirements for organisations
wishing to develop education and training programmes, such as minimum qualifications for
tutors and assessors, and special resource requirements.
Comments on this unit standard
Please contact the Boating Industry Training Organisation training@bia.org.nz if you wish
to suggest changes to the content of this unit standard.
 New Zealand Qualifications Authority 2016