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Elements and Performance Criteria

  1. Calculate shipboard areas and volumes
  2. Calculate vessel displacement
  3. Calculate ship dimensions
  4. Explain position of centre of gravity of vessel in relation to its keel and midships
  5. Explain effects of water density and flooding of mid-length compartment on vessel draft
  6. Perform calculations related to propellers and vessel speed
  7. Calculate voyage and daily fuel consumptions
  8. Calculate pressures and loads on surfaces due to hydrostatics

Range Statement

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.

Shipboard areas include one or more of the following:

bulkheads

elemental areas

water planes

Shipboard volumes include one of the following:

transverse sectional areas

water plane areas

Problems related to vessel displacement include one of the following:

addition of mass

removal of mass

Coefficients for areas include one of the following:

midships (CM)

waterplane (CW)

Coefficients for underwater volumes include one of the following:

block (Cb)

prismatic (Cp)

Centre of gravity includes one or more of the following:

centre of gravity (CG)

longitudinal centre of gravity (LCG)

vertical centre of gravity (VCG)

Mass includes one or more of the following:

ballast

cargo

fuel

passengers

Filling rates include one or more of the following:

accidental flooding

tank testing

Performance Evidence

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:

assessing own work outcomes and maintaining knowledge of current codes, standards, regulations and industry practices

explaining basic principles of naval architecture

identifying and applying relevant mathematical formulas and techniques to solve basic problems related to speed, fuel consumption and stability of commercial vessels

identifying and interpreting numerical and graphical information, and performing mathematical calculations related to shipboard areas and volumes, vessel displacement, ship dimensions, centre of gravity, vessel speed, fuel consumption and hydrostatic pressure

identifying, collating and processing information required to perform calculations related to speed, fuel consumption and stability of commercial vessels

imparting knowledge and ideas through verbal, written and visual means

performing accurate and reliable calculations

reading and interpreting written information needed to perform calculations related to the seaworthiness of commercial vessels

solving problems using appropriate laws and principles

using calculators to perform mathematical calculations.

Knowledge Evidence

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:

basic structural members of a ship and the proper names of the various parts

buoyancy

centre of gravity:

centre of gravity (CG), longitudinal centre of gravity (LCG), vertical centre of gravity (VCG)

calculations

density correction formula

fuel consumption calculations

hydrostatic pressure

principle of displacement

ship:

stability

stability calculations

measurements

displacement

shipboard:

areas

volumes

Simpson’s Rules

Tonnes per centimetre (TPC) immersion

trim and stress tables, diagrams and stress calculating equipment

vessel speed calculations

watertight integrity.