Enclosed Space Entry: When Was Your Gas Detector Last Checked?

Entry into enclosed spaces has always been considered a perilous activity. With constantly improving procedures, regulations and training, it is clear that the maritime industry has identified and recognises the risks involved in enclosed space entry, both on land and at sea.

However, casualties continue to occur despite improved safety procedures.

When incidents are investigated, procedures and regulations are rarely the root cause. In most instances, casualties occur when risk assessments are rushed, permits are not fully reviewed, equipment checks are missed, and assumptions are made. All of which are easy oversights in a high-pressure situation.

As an industry, the challenges we face are not simply identifying hazards; it is ensuring that control measures are functioning as intended before anyone enters an enclosed space.

Can I trust my environmental reading equipment?

Gas detectors act as a vital protective measure, identifying oxygen-deficient atmospheres, toxic gases, flammable vapours and other hazards that go unseen.

Delegate in an enclosed space looking for a casualty

Like any safety equipment, gas detectors are not infallible. All technology is at risk of faults, breakages or misuse. Which is why they require regular testing and maintenance to ensure that they can be used when they are needed the most. Like any safety equipment, gas detectors are not infallible. All technology is at risk of faults, breakages or misuse. Which is why they require regular testing and maintenance to ensure that they can be used when they are needed the most.

Why does my gas detector need to be ready?

Gas detectors can still appear fully operational, even if they aren’t. Sensors can degrade over time, batteries can run out of charge, and equipment can be damaged if not maintained.

If these instances do not render the detector unusable, there is a chance that it will not alert users to the faults.

Manufacturers, regulators and industry guidance all strongly recommend conducting regular routine checks, maintenance, calibration and bump testing to ensure your safety equipment is always operational.

If gas detectors are neglected, personnel may unknowingly rely on inaccurate information, especially when making entry decisions. In enclosed space entry scenarios, a false sense of security can be just as dangerous as any physical hazard.

Can I rely on technology when entering an enclosed space?

Despite technology offering a wealth of support and information, the safety of personnel entering enclosed spaces is ultimately the responsibility of the operator.

If crew are poorly equipped to operate the technology, understand its readings and respond accordingly, even the best equipment is rendered obsolete.

delegate during enclosed space entry rescuing a casualty

The best solution to ill-equipped crew is an increase in regular training, practising the use of safety tools and technologies.

Training also helps to eradicate complacency because crew are encouraged to follow routine checks, regardless of prior knowledge, assumptions or familiarity of the space in question.

Entry into enclosed space training at The Maritime Skills Academy

The most important aspect of safely entering an enclosed space is confidence. Confidence that the atmosphere has been properly tested, the gas detector is functioning correctly, personnel understand the risks, and everyone involved knows what to do if conditions change.

However, paperwork and theory alone cannot achieve this level of preparedness. Crew require regular, ongoing preparation and training. That is why our enclosed space training course replicates realistic scenarios, so delegates can experience emergencies as they would on board.

Delegates are trained in and practice atmospheric testing, gas detection equipment checks, risk assessments, emergency response planning and safe enclosed space operations.

An important update to STCW PSSR

In a recent announcement, the MCA introduced a free online training module designed to help all seafarers and companies meet the updated PSSR requirements.

This course must be completed by 31st March 2027 if you took a PSSR course before 1st January 2026.

The STCW PSSR course amendments require seafarers to demonstrate knowledge of:

  • Prevention of violence and harassment
  • Identification and reporting of such behaviours 
  • Understanding impacts on safety, health and wellbeing 
  • Appropriate response and support, including trauma‑informed principles

The Importance of Personal Safety and Social Responsibility On Board

STCW Personal Safety & Social Responsibilities (PSSR) is an essential qualification for anyone looking to work on board. Not only is it a legal requirement, but it also prepares crew for onboard situations and equips them with the knowledge they need to display appropriate conduct.

PSSR helps new and existing crew to manage onboard wellbeing for themselves and their peers; it covers best practice in ocean protection and prepares crew for onboard emergencies and alarms.

Introduction of new modules to PSSR

The latest updates to the course have been introduced to improve wellbeing and the onboard work environment. Bullying and harassment of all kinds can occur in any workplace, and friction can develop between anyone. Unlike other workplaces, a career onboard can mean a blurred line, or lack of differentiation between work life and social life.

PSSR delegates in classroom

The nature of the role means that the impacts of harassment and bullying are heightened, and the importance of appropriate training is even more essential for those who work at sea.

Prevention of violence and harassment

The key to maintaining a pleasant onboard atmosphere starts with preventing violence and harassment.

A crew that does not fear uncomfortable interactions is more likely to operate smoothly, and individuals will be in a better space mentally, ultimately improving the quality of life and work on board.

Identification and reporting of such behaviours

If prevention is not an option and negative onboard interactions are occurring, all seafarers must be trained to identify these specific behaviours.

Appropriate training will ensure bullying and harassment are identified and reported to seniors as quickly as possible. This will mean conflict resolution can begin and the onboard atmosphere can return to functionality.

Understanding impacts on safety, health and wellbeing

In some circumstances, bullying and harassment could be well-hidden or disguised. By understanding the impacts of harassment on safety and health and wellbeing, crew can better identify if it is occurring.

Recognising a fellow crew member whose behaviour has changed, like withdrawing, avoiding team activities, or behaving erratically, can be a clear indication of an issue.

Crew can then proceed to report their suspicions, and the conflict can be investigated.

Crew members should also be prepared to respond to the fallout of an onboard conflict, because it can affect the entire team and the atmosphere of onboard spaces.

Appropriate response and support, including trauma-informed principles

An appropriate response to bullying and harassment is crucial, especially when a crew member is approached by a peer who is willing to open up about their experiences.

A victim of bullying and harassment is more likely to confide in someone they are familiar with than a senior or manager, which is why it is so important for all seafarers to be trained in how to respond to trauma.

PSSR Training Update

Following the recent updates, it is now essential for anyone who completed their PSSR training prior to the 1st of January 2026 to update their qualification before the 31st March 2027.

To help seafarers update their qualification in an accessible way, the MCA has released a free module that can be completed online.  

Alternatively, at the Maritime Skills Academy, we are increasing our PSSR course dates to accommodate seafarers who need to update their training, which you can book by contacting our team.

Which Marine Course Should I Take? 

If you’re considering a career at sea, or looking to work in the maritime industry, there will be marine courses that you will need to complete. 

However, not all courses are mandatory, as it will still depend on the role you’re looking for.  

At the Maritime Skills Academy, we offer a variety of marine courses that can open a number of doors. 

Basic Safety Training (BST) 

Starting with the most important marine course, by gaining your BST, you’ll be able to apply for a wide range of roles.  

Delegate using fire extinguisher during their marine course

The BST course covers all five modules that make up the basic Standards of Training Certification and Watchkeeping (STCW) certification, including: 

  • Fire prevention & Fire Fighting 
  • Personal Survival Techniques 
  • Elementary first Aid 
  • Personal Safety & Social Responsibilities 
  • Security Awareness 

Which Jobs Require BST? 

Holding the Basic STCW certification is a legal requirement for any mariner that works on board a commercial vessel longer than 24 metres, including ferries, tankers, cruise ships and more. In addition, the BST is a prerequisite for many more advanced courses that will help to develop your career at sea.  

How often do I need to refresh my maritime training? 

(updating courses as per Manila amendments) 

Here are the refreshers that require updating every 5 years: 

  • UPST (0.5 days theory and practical) 
  • UFP&FF (1 day practical) 
  • UAFF (1 day theory) 
  • UPSCRB (0.5 or 1 day Theory and practical) 
  • UFRB (0.5 day or 1 day theory and practical) 
  • UPMC (medical care 3 days practical) 

It is mandatory for all crew to retake the courses every five years. Refreshers are shorter than the full course you took the first time around. You also have the option to self-declare onboard training so you can take shortened updating courses. 

GWO Basic Safety Training (BST) 

GWO Basic Safety Training (BST) is an internationally recognised health and safety certification for people working in the wind energy industry. The program covers five key safety topics, including: 

  • Fire awareness 
  • First aid 
  • Manual handling 
  • Sea survival 
  • Working at heights 

MSA has partnered with Checkmate (HART) to offer all modules of the GWO BST programme. At MSA Dover, we offer the GWO Sea Survival course, covering the topics: 

  • Risks related to transfers 
  • Transfer from vessel to dock and vessel to foundation 
  • Emergency and safety procedures on installations, vessels, and WTG 
  • Evacuation from WTG to the water by means of rescue device 
  • Individual and collective survival techniques at sea 
GWO delegates stood in orange speedboat with hard hats on

The one-day intensive course combines both theory and practical elements to ensure that students are prepared for any eventuality while working offshore. 

What Jobs Require GWO Basic Safety Training (BST)? 

The GWO BST is required for all workers in the offshore renewables industry, including: 

  • Technicians 
  • Engineers 
  • Project Managers 
  • Management Staff 

Currently, the UK offshore renewables industry employs 40,000 workers, with that number expected to rise to 97,000 by 2030, meaning there’s plenty of opportunity to work in this growing industry.  

MCA Approved Engine Course 1 (AEC1) 

The MCA Approved Engine Course 1 (AEC1) is a must for anyone looking to pursue a career as a marine engineer or ship operator aboard a commercial vessel under 24 meters in length. 

Not only is the course recognised (and often required) by private captains and charter companies, but it is also a required step toward obtaining the Engineer Officer Certificate of Competency from the MCA. 

The AEC1 course covers a variety of topics, including: 

  • Compression ignition engines 
  • Two- and four-stroke operation cycles 
  • Fuel systems 
  • Cooling systems 
  • Electrical systems 
  • Lubrication technologies 
  • Power transmission units 

Over the five-day course, students will receive both classroom instruction and hands-on experience with engines, allowing them to put their new knowledge to the test. 

What Jobs Require MCA Approved Engine Course 1 (AEC1)? 

Although the MCA Approved Engine Course 1 (AEC1) isn’t legally required for work aboard commercial vessels under 24 meters in length, it is typically required (or preferred) by private captains and charter companies. 

In addition, the AEC1 course is a necessary step toward obtaining the Engineer Officer Certificate of Competency from the MCA. Obtaining the Engineer Officer Certificate of Competency along with the Basic STCW certification allows holders to serve as chief or first assistant engineer on Merchant Navy vessels of any size. 

Launch Your Maritime Career at the Maritime Skills Academy 

Unfortunately, there is no single answer to the question, “Which maritime course is best?” 

The best marine course for you will depend on your career goals and the type of vessel you hope to work on. 

external view of the Maritime Skills Academy

Discover our MCA, GWO, and BMA approved courses that will help you launch your maritime career.  

To learn more about our courses or to find out which one is right for you, feel free to browse our course catalogue or contact our booking team to discuss your requirements.