Unit of competency Outline

Date retreived
24/07/2026 4:55 AM AWST

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Apply basic principles of naval architecture

Apply basic principles of naval architecture

Unit of competency
National Code
MARL002
State Code
WH869
TGA Status
Replaced
DTWD Status
Replaced
Current Release Number
1.00
Current Release Date
07/10/2013
View on TGA
State Implementation and Classification
Approved Date
04/02/2014
Field of Education
031701 - Maritime Engineering
Original Release Date
04/02/2014
Nominal Hours
50
Description
This unit involves the skills and knowledge required to perform basic calculations related to the seaworthiness of commercial vessels, including those dealing with watertight integrity and vessel stability.This unit applies to people working in the maritime industry as a Marine Engineering Watchkeeper on commercial vessels greater than 750 kW or as an Engineer Class 3 Near Coastal.This unit has links to legislative and certification requirements.
Notes
Elements and Performance Criteria
1 Calculate shipboard areas and volumes
  • 1.1 Basic principal structural members of ship and proper names of various parts are detailed
  • 1.2 Simpson’s Rules are applied to calculate shipboard areas
  • 1.3 Simpson’s Rules are applied to calculate shipboard volumes
2 Calculate vessel displacement
  • 2.1 Tonnes per centimetre (TPC) values and Simpson’s Rules are applied to calculate vessel displacement
  • 2.2 Calculations are performed using TPC values and Simpson’s Rules to solve problems related to vessel displacement
3 Calculate ship dimensions
  • 3.1 Ship form dimensions are calculated using coefficients for areas
  • 3.2 Ship form coefficients for underwater volumes are calculated
  • 3.3 Influence of common hull modifications on hull form coefficients is explained
  • 3.4 Calculations are performed to solve problems of ship form coefficients following change to vessel length resulting from mid body insertion or removal
4 Explain position of centre of gravity of vessel in relation to its keel and midships
  • 4.1 Centre of gravity calculations for a vessel are performed
  • 4.2 How centre of gravity changes with redistribution, addition and/or removal of mass is explained
  • 4.3 How addition, removal or transfer of mass may cause overturning moments is identified
  • 4.4 Problems are solved involving addition, removal and vertical movement of mass by performing centre of gravity calculations for typical vessel loaded conditions
  • 4.5 Calculations are performed using results from inclining experiments to obtain initial stability characteristics
5 Explain effects of water density and flooding of mid-length compartment on vessel draft
  • 5.1 Relationship between changes in underwater volume and changes in water density is outlined
  • 5.2 Fresh water allowance of a vessel is determined
  • 5.3 Change in mean draft for vessel movement between waters of different densities is calculated
  • 5.4 Volume lost-volume gained relationship for flooded compartments is explained
  • 5.5 Calculations are performed to solve problems of mid-length compartment flooding in simple box-shaped hull forms
  • 5.6 Fundamental actions to be taken in the event of partial loss of intact buoyancy are identified
6 Perform calculations related to propellers and vessel speed
  • 6.1 Relationship between propellers and vessel speed is explained
  • 6.2 Problems related to vessel speed and propellers are solved by calculating theoretical, apparent and true speeds, apparent and true slips, wake speed and Taylor wake fraction
  • 6.3 Impact of fouling on vessel hull and propeller is outlined
7 Calculate voyage and daily fuel consumptions
  • 7.1 Fuel consumption is determined by applying admiralty coefficient for fuel consumption taking account of ship speed, shaft power and displacement
  • 7.2 Calculations are performed to solve problems of vessel fuel consumption taking account of ship speed, shaft power and displacement
  • 7.3 Impact of fouling on vessel fuel consumption is explained
8 Calculate pressures and loads on surfaces due to hydrostatics
  • 8.1 Standard formula for hydrostatic pressure is defined
  • 8.2 Hydrostatic load on vertical and horizontal surfaces is calculated
  • 8.3 Method of calculating loads on typical tank structures for different filling rates is explained
No information
No information
Replaces
State Code National Code Title Type
WG462 MARL5004A Apply basic principles of naval architecture Unit of competency
Replaced By
State Code National Code Title Type
OCH20 MARL045 Apply basic principles of naval architecture Unit of competency