Maritime Fuels (MTEx01 – MTEx04)

Competency certification for safe working with ships using gas and low-flashpoint fuels.

Maritime Fuels (MTEx01 – MTEx04)

The CompEx Maritime Fuels qualification has been developed for technicians and engineers working on vessels that use gas or low flashpoint fuels such as LNG.

Download the qualification leaflet here.


This course is suitable for engineers and technicians who are responsible for the maintenance and inspection of electrical systems and instrumentation within hazardous areas onboard vessels using gas or low flashpoint fuels.

Entry requirements

  • Practicing competent electrical technicians
  • Practicing competent instrument technicians
  • Electrical/instrument engineers with previous practical experience
  • Engineers or technicians with prior CompEx certification supported by employer sponsored letter


5 days


The 5-day course includes:

  • 3 days of guided learning (theoretical 15-20 hours, practical 4-6 hours)
  • 2 days of assessment

This course has been developed in consultation with key industry partners, and covers the requirements set out in the standards IEC 60079:14, IEC 60079:17, IEC 60092-502 and the IGF Code.

The IGF International Code of Safety for Ships using Gases or Low-flashpoint Fuels came into force in 2017, which included new training requirements for crew.  The International Convention for the Safety of Life at Sea (SOLAS) was also amended to require compliance with the IGF code.

Part 502 of IEC 60092 relates to electrical installations in tankers carrying liquids which are flammable, either inherently, or due to their reaction with other substances, or flammable liquefied gases.

This course is ideal for experienced technicians and engineers with relevant qualifications of any merchant or commercial vessels including Cruise lines, bulk carriers, general cargo, container and tankers that are powered with gas or low flashpoint fuels such as LNG.

Key Learning Objectives

Candidates that successfully complete the Maritime Fuels (MTEx01 – MTEx04) qualification will be able to:

  • Identify the correct regulations, codes and IEC standards which are applicable.
  • Identify the correct criteria and descriptors used to classify a hazardous location onboard a vessel.
  • Recognise the correct characteristics of common hazardous gases, vapours and dust discussed during the course.
  • Understand and recognise the hazards specific to LNG.
  • Apply the appropriate protection concepts to equipment selection, installation and inspection.

Qualification details

Successful candidates will receive an internationally recognised CompEx Certificate in Core Competence.


Assessment is undertaken using both practical assessment and online examination that covers the four separate CompEx units.

Online exam

Candidates must undertake a multiple-choice online examination that consists of 60 questions answered over 1.5 hours.

Practical assessments

Candidates are required to undertake four practical assessments (one per unit):

  • MTEx01 – 3 hours 45 minutes
  • MTEx02 – 1 hour 30 minutes
  • MTEx03 – 3 hours
  • MTEx04 – 1 hour 15 minutes

Find a centre

Find your nearest licensed CompEx centre and get full contact details using our simple map facility.

Retain certification

Achieving CompEx core competency is essential for practitioners who work in potentially explosive environments, but competency must be maintained following certification.

Resource centre

The CompEx resource centre provides all the essential forms, documentation and downloads that you may need for CompEx training and registration

Applicable industries:

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