CompEx Courses

Maritime Fuels
Units MTEx01 - MTEx04



SETA is proud to be the first centre in the world delivering CompEx Maritime Fuels - a competency certificate for safe working with ships using gas and low-flashpoint fuels.  The course is delivered at our centre in Southampton.

International shipping transports more than 80% of global trade to communities all over the world. While explosive atmosphere safety has always been a concern for the maritime industry, the potential risk has increased due to a recent transition from ‘bunker’ fuel or heavy fuel oil (HFO) to liquefied natural gas (LNG) for the main propulsion system of vessels.

This move has been driven by the implementation of emission control areas, particularly within European and North American waters, which have restricted emissions of sulphur, nitrogen oxide and particulate matter, as well as by global IMO regulations on sulphur emissions.

The highest safety concern for crews accustomed to HFO operation is the comparatively high energy content of LNG storage and the explosion risks associated with leakage. Bulk onboard storage of fuel is typically in liquid form within a cryogenic tank, with vaporiser systems converting the fuel to gaseous form as it is fed to the engine. The design of LNG vessel propulsion systems will be in accordance with ATEX requirements and will include the specification of onboard fuel storage and engine supply, monitoring, fire-fighting measures, and escape procedures.

It is essential that all those working on board and in port-based LNG bunkering operations have the training and knowledge to work safely within this potentially explosive environment. In addition, operatives will also need to be aware of the more general risks associated with the use of flammable liquids and vapours, for example, those associated with the operation of the lubrication and hydraulics systems of large ocean-going vessels. 


A competency certificate for safe working with ships using gas and low-flashpoint fuels. 

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.

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.

Candidates who are successful in both the theory and practical assessments will receive a CompEx E- Certificate in Core Competence. There is no refresher for this course 


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.


5 Days

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


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.


• 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


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



Assessment is undertaken using both practical assessments and an 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



Due to the nature of CompEx courses you will need to contact our Commercial Admin Team to check availability and to make a booking.  Each of the CompEx courses has quite specific information required by CompEx Certification (The Awarding Body) which differs by course.  So to avoid confusion and to ease the booking process our Commercial Admin Team will be happy to help guide you through the necessary requirements.

SETA, Second Avenue, Millbrook, Southampton, SO15 0LP