Recreational Water Facilities (RWFs) are a valued feature on board passenger ships, providing leisure and wellness opportunities for passengers of all ages. At the same time, these facilities present specific public health risks if not properly managed, as they can act as vehicles for the transmission of communicable diseases. Pathogens such as Cryptosporidium parvum, Legionella spp., and Pseudomonas aeruginosa have been associated with inadequately controlled recreational water systems, leading to gastrointestinal, skin, ear, eye, and respiratory infections.

Chapter 5.0 of the 3rd Edition of the European Manual for Hygiene Standards and Communicable Disease Surveillance on Passenger Ships establishes a comprehensive framework for the safe and hygienic operation of RWFs on board. It recognises that effective control of health risks relies on the coordinated application of water treatment, monitoring, cleaning, maintenance, and clearly defined operational procedures. These elements work together to ensure that recreational water remains within acceptable physical, chemical, and microbiological limits at all times.

For onboard Engineers and Deck Officers, this module translates public health principles into practical operational requirements. It outlines the need for documented plans, routine monitoring, timely corrective actions, proper maintenance of equipment, and clear safety measures for users. The standards described in this chapter support a preventive approach, where risks are identified and controlled before they can impact passenger or crew health.

This module builds knowledge and awareness of these requirements, enabling onboard personnel to understand not only what actions are required, but why they are essential for protecting health and maintaining safe recreational water environments throughout.