||The increasing sizes of ships determine the interest in modifying the already existing solutions. Simulation models allow us to analyse the possible modernisation options. The article presents analysis results for the width of the fairway to Ystad, marked with buoys with respect to navigation safety. After a thorough analysis,
taking into account the safety of navigation, further possibilities of development have been determined. Study results are aimed at designing new solutions in case of modernization of the approach channel to Ystad.