Introduction:
As part of their compliance with European and global standards, passenger ships implement water safety measures^1,2. The European Manual incorporates World Health Organisation (WHO) methods for creating Water Safety Plans (WSPs) in passenger ships¹. Development of WSPs in large passenger ships requires a systematic approach, resources and expertise. The purpose of the Healthy Sailing AI-WSP tool is to assist with adherence to a systematic approach, ensuring that no step is missed and that development is specific to each ship.

Methods:
A situation analysis to identify the legal framework and existing mathematical models and electronic systems was conducted. In order to establish the inputs of the tool (i.e. list of possible hazardous events, prespecified risk assessment values) several WHO documents were used as well as the experience from the implementation of WSPs on cruise ships. Previous work form SHIPSAN projects was also exploided³

Results:
The prototype guides the users through the steps of WSP development and assists in the risk assessment by providing lists of possible hazardous events and prespecified risk assessment values. The tool facilitates creation of a WSP team, documentation and description of the water systems and identification and prioritization of hazardous events associated with each water system component, assigning likelihood values and automatically calculating risk scores. It provides functionalities for users to add control measures for each hazardous event identified and supplement each control measure with operational monitoring, including operational limits, assignment of responsible personnel and instructions for monitoring.

Conclusions:
To our knowledge this is the first WSP software tool that is tailored to passenger ships. An intervention study will be conducted on board cruise ships in order to evaluate the effectiveness of the tool.