MARA005 Maintain vessel stability

Release: 2

MARA005 Maintain vessel stability

Modification History

Release 2. Application, Elements and Performance Criteria and other minor edits were corrected to include relevant information.

Release 1. New unit of competency.

Application

This unit involves the skills and knowledge required to determine the stability and trim of a vessel to ensure that stability conditions of vessel comply with intact stability criteria under all conditions of loading.

This unit applies to the work of a Watchkeeper Deck, Master up to 500 gross tonnage and Master up to 80 metres Near Coastal.

This unit has links to legislative and certification requirements.

Pre-requisite Unit

Not applicable.

Competency Field

A – Handling Cargo and Vessel Stability

Unit Sector

Not applicable.

Elements and Performance Criteria

1	Calculate stability	1.1	Vessel stability data book is accessed and checked for endorsement
1.2	Data is interpreted to determine vessel safety parameters
1.3	Stability is accurately calculated using data extracted from vessel stability data book
1.4	Stability calculations are checked to ensure they correlate with data set out in vessel stability book
1.5	Spurious or incorrect information is recognised and recalculated
1.6	Trim, draughts and list are adjusted as required
1.7	Stability calculations are conducted at a time, frequency and scope appropriate to voyage
2	Manage weight distribution	2.1	Stability calculations are used to plan weight distribution to ensure assigned load line conditions are not exceeded
2.2	Weight distribution is controlled to maintain vessel within acceptable stability and stress limits for loading operation and at all stages of voyage
2.3	Appropriate action is taken when weight distribution is compromising vessel safety
3	Maintain records of stability management	3.1	Data and information related to stability management is accurately recorded
3.2	Data and information related to stability management is filed and stored according to organisational procedures

Foundation Skills

This section describes those language, literacy, numeracy and employment skills that are essential to performance.
Foundation skills essential to performance are explicit in the performance criteria of this unit of competency.

Range of Conditions

Specifies different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. Range is restricted to essential operating conditions and any other variables essential to the work environment.
Stability calculations must include:	calculation of areas under the curve changes in draft and trim due to differing water densities correction for free surface effect draft and trim metacentric height moment of statical stability at small angles of heel transverse and longitudinal stability values for righting levers and construction of the curve of stability
Appropriate action includes one or more of the following:	amending the vessel loading plan ballast management reduction of free surface
Data and information related to stability management includes one or more of the following:	cargo stowage and loading plan records of stability calculations safety management system stability and trim booklet

Unit Mapping Information

This is a new unit. This unit is equivalent to MARA5001A Maintain vessel stability.

Links

Companion Volume implementation guides are found in VETNet - https://vetnet.gov.au/Pages/TrainingDocs.aspx?q=772efb7b-4cce-47fe-9bbd-ee3b1d1eb4c2