Introduction:
Exhaust Gas Cleaning Systems, also known as scrubbers, are today widely used to allow for use of High Sulphur Heavy Fuel Oil and still comply with the regulations limiting sulphur content in marine fuels. Since 2018, roughly 5000 ships have installed scrubbers. The technology requests updated skills for safe handling of chemicals and compliance with the new regulations. The aim of this study was to review the seafarers’ knowledge, attitudes and practices related to the operation and maintenance of scrubbers

Methods:
Scopus, Web of Science, Google scholar and grey bibliography were searched for this scoping review from 2018 to 2024. The records were uploaded to EndNote and Rayyan to conclude the selection process.

Results:
From the 67 identified articles 4 met the eligibility criteria referring to 954 participants. The articles dealt with practices related to environmental compliance, decarbonization, health and safety procedures. Summarised from the included studies the results showed in connection to knowledge that only 27% of the seafarers read and understand the Material Safety Data Sheet (MSDS) when a new cargo is loaded¹. Values and beliefs in relation to safety climate showed that seafarers have lower perceptions of safety (Mdn = 3.00) than onboard service staff (Mdn = 3.11), p=0.01². Personal Protective Equipment (PPE) during cargo operation was practiced by only half of seafarers (53%) and by only (16%) during tank cleaning³. The lack of knowledge (34%) as well as the lack of relevant competencies (32%) about the new technologies were considered as barriers to adopt energy efficiency measures on board⁴.

Conclusions:
Scrubbers pose an additional burden on crews that need to get new skills on the maintenance and handling. Training in new technologies helps seafarers performing their duties effectively. Compliance with environmental regulations create additional stress and workload with adverse effects on ship safety. International organisations should take into considerations the impact of regulations on seafarers’ health and wellbeing.