Diploma of Maritime Operations (Marine Engineering Class 3)

This qualification is suitable for people who work in the maritime industry as an Engineer Class 3 on ships powered by main propulsion machinery of any propulsion power in any operating area, or as a second engineer on a vessel of less than 3000 kW operating in near coastal waters.


Total number of units = 20 units

20 core units

Core units



Handling Cargo and Vessel Stability

add topic MARA3001A

Contribute to safe cargo operations on liquefied gas tankers

add topic MARA3002A

Contribute to safe cargo operations on oil and chemical tankers


Equipment Checking and Maintenance

add topic MARB5001A

Maintain and repair marine electrical and electronic equipment

add topic MARB5002A

Maintain and repair shipboard machinery and equipment


Equipment Operations

add topic MARC5001A

Employ tools, equipment and materials in a shipboard context



add topic MARE5001A

Communicate effectively when performing engineering duties


Operational Quality and Safety

add topic MARF3007A

Work safely in confined spaces on a vessel



add topic MARJ5001A

Ensure compliance with environmental management legislation


Marine Engineering

add topic MARL5001A

Apply basic principles of marine electrotechnology

add topic MARL5002A

Apply basic principles of marine engineering thermodynamics

add topic MARL5003A

Apply basic principles of marine mechanics

add topic MARL5004A

Apply basic principles of naval architecture

add topic MARL5005A

Demonstrate basic knowledge of marine auxiliary boilers

add topic MARL5006A

Demonstrate basic knowledge of marine auxiliary machinery and systems

add topic MARL5007A

Demonstrate basic knowledge of marine control systems and automation

add topic MARL5008A

Demonstrate basic knowledge of marine diesel engines and systems

add topic MARL5009A

Demonstrate basic knowledge of marine electrical systems

add topic MARL5010A

Demonstrate basic knowledge of marine steam turbines and main boilers

add topic MARL5011A

Demonstrate basic knowledge of ships and ship routines

add topic MARL5012A

Perform basic marine engineering calculations


    Pathways into the qualification

    MAR40213 Certificate IV in Maritime Operations (Marine Engine Driver Grade 1)

    Pathways from the qualification

    MAR60113 Advanced Diploma of Maritime Operations (Marine Engineering Class 2)

Entry Requirements

There are no entry requirements for this qualification.

Licensing Information

This qualification is currently cited as meeting some of the requirements for certification as an Engineer Class 3 as described in Marine Orders Part 3: Seagoing Qualifications under the Navigation Act 2012 by the Australian Maritime Safety Authority (AMSA).

Certification will require achievement of the MAR50113 Diploma of Maritime Operations (Marine Engineering Class 3) and other requirements; people seeking certification should check with AMSA.

Employability Skills

The following table contains a summary of the employability skills as identified by the maritime industry for this qualification. This table should be interpreted in conjunction with the detailed requirements of each unit of competency packaged in this qualification. The outcomes described here are broad industry requirements that may vary depending on packaging options.

Employability Skill

Industry/enterprise requirements for this qualification include:


Correctly and accurately complete engineering reports, running sheets and other engineering documentation relevant to the performance of engineering duties

Receive, read and clarify as required, messages concerning vessel safety and operations, and correctly interpret and apply to engineering activities

Use appropriate techniques when communicating with multilingual crew to ensure communication is effective and messages are clearly understood


Account for personnel involved and equipment used

Seek Master’s advice when challenges are beyond own scope of technical competence or when input from environmental specialist may be required

Use appropriate strategies to foster the trust and confidence of stakeholders


Identify and implement control measures to mitigate risk

Identify difficult situations and negotiate solutions using a collaborative approach

Respond to complaints and requests for information from authorities and authorised personnel

Initiative and enterprise

Identify precautions during entry to protect occupants

Recognise unusual situations, unexpected risks/hazards and potential/actual environmental incidents

Report opportunities and recommendations for improvements

Planning and organising

Identify, collate and process information required to prepare verbal and written reports

Monitor the implementation of environmental management plans, policy and procedures, and specified work methods

Prepare appropriate plan for completion of work activity in confined space


Assess own work outcomes and maintain knowledge of current codes, standards, regulations and industry practices

Clarify own scope of authority/responsibility for achieving specific environmental outcomes for the vessel and the roles of other key personnel

Impart knowledge and ideas as required through oral, written and visual means


Develop and provide information and training to ensure all crew members understand their environmental obligations/responsibilities

Effectively provide feedback, instruction and training on work performance to engine room crew according to vessel procedures and established engineering practice

Monitor effectiveness of the information and training, and provide additional information/training as required


Use atmospheric detection equipment and interpret the readings

Use computer and relevant equipment to enter, access and retrieve engineering information

Store records to enable easy access and review by authorised personnel according to regulatory and organisational requirements