Unit of competency Outline

Date retreived
22/07/2026 8:58 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.

CONTROL TRIM, STABILITY AND STRESS

CONTROL TRIM, STABILITY AND STRESS

Unit of competency
National Code
TDMMA1007B
State Code
S5336
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
19/06/2007
View on TGA
State Implementation and Classification
Approved Date
21/12/2007
Field of Education
031705 - Marine Craft Operation
Original Release Date
21/12/2007
Nominal Hours
120
Description
UNIT DESCRIPTOR: This unit involves the skills and knowledge required to control the trim and stability of a commercial vessel and the stresses on its hull and structure both under normal operating conditions and in the event of flooding following damage to one or more compartments.
Notes
Elements and Performance Criteria
1 Control the trim and stability of a vessel under normal operating conditions
  • a Stability analysis and weight distribution planning are conducted at a time, frequency and scope appropriate to the proposed nature of the voyage or vessel operation
  • b Weight distribution is organised to maintain the vessel within acceptable stability limits for anticipated operation situations likely to be experienced during the voyage
  • c Calculations are made to determine the draught and centre of gravity of the vessel after adding, removing or shifting weight
  • d Trim, draughts and list of the vessel are controlled as required to ensure they are suitable to progress all anticipated vessel operations
2 Control the trim and stability of a vessel in the event of damage and consequent flooding
  • a Damage to the vessel and the nature of flooding of compartments is promptly assessed
  • b The effects upon vessel stability of flooded and flooding compartments is evaluated
2 Control the trim and stability of a vessel in the event of damage and consequent flooding(continued)
  • c A suitably strategy for maintaining or restoring trim and stability is devised
  • d Where stress limits of a vessel are unavoidably exceeded as a consequence of damage and/or flooding, appropriate action is initiated to ensure the safety of shipboard personnel, including where necessary abandoning the vessel
3 Manage the stress conditions of the vessel
  • a Stress limits of vessel are assessed in accordance with maritime principles and vessel manufacturer's specifications
  • b Stability of vessel is monitored at a frequency and scope relevant to the nature and speed of vessel operations or emergency and is sufficient to enable stress and stability to be maintained within acceptable limits at all times
  • c Appropriate action is taken promptly where weight distribution has or could exceed acceptable safety limits to ensure that the safety of the vessel and its passengers, crew and load is maximised
No information
No information
Replaces
State Code National Code Title Type
S4476 TDMMA1001A Control trim, stability and stress Unit of competency
Replaced By
State Code National Code Title Type
WG357 MARA6001A Manage stability of a vessel 500 gross tonnage or more Unit of competency
AVD94 MARA009 Manage stability of a vessel 500 gross tonnage or more Unit of competency