Apply basic principles of naval architecture

Unit of competency Outline

Date retreived
22/07/2026 3:47 PM AWST

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Unit of competency

National Code
MARL045

State Code
OCH20

TGA Status
Current

DTWD Status
Approved

Current Release Number
1.00

Current Release Date
27/10/2020

View on TGA

State Implementation and Classification

Approved Date

09/04/2021

Field of Education

031701 - Maritime Engineering

Original Release Date

09/04/2021

Nominal Hours

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 in the capacity of:Electro-Technical Officer (STCW Electro-Technical Officer Unlimited)Engineer Class 3 Near CoastalEngineer Watchkeeper (STCW Engineer Watchkeeper Unlimited). Licensing/Regulatory InformationLegislative and regulatory requirements are applicable to this unit. Regulatory requirements include STCW International Maritime Organization (IMO) model course competencies and areas of knowledge, understanding and proficiency, together with the estimated total hours required for lectures and practical exercises. Teaching staff should note that timings are suggestions only and should be adapted to suit individual groups of trainees depending on their experience, ability, equipment and staff available for training.Near Coastal Qualifications:This unit is one of the requirements to obtain Australian Maritime Safety Authority (AMSA) certification as an Engineer Class 3 Near Coastal as defined in the Marine Order 505 (Certificates of competency - National Law) 2013.Blue Waters Qualifications:This unit is one of the requirements to obtain Australian Maritime Safety Authority (AMSA) certification as an Electro-Technical Officer (STCW Electro-Technical Officer Unlimited) or Engineer Watchkeeper (STCW Engineer Watchkeeper Unlimited) and to meet regulatory requirements this unit must be delivered consistent with Marine Orders and with the relevant sections of the International Convention on Standards of Training, Certification and Watchkeeping for Seafarers (STCW).

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 (CG) of vessel in relation to its keel and midships

4.1 CG calculations for a vessel are performed
4.2 How CG 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 CG 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 Freshwater 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

Replaces

State Code	National Code	Title	Type
WH869	MARL002	Apply basic principles of naval architecture	Unit of competency

State Code	National Code	Title	Type
BFV7	MAR50120	Diploma of Marine Engineering	Qualification