The analytical framework of the Technique for the Retrospective and predictive Analysis of Cognitive Errors (TRACEr) was developed with a specific focus on Air Traffic Control as a retrospective incident analysis technique and as predictive hun1an error identification. TRACEr focusses on the hun1an­machine interface (HMI) and suggests that incidents are often triggered by underlying cognitive and psychological processes which affect the performance of an operator. However, in order to be used in the maritime context, TRACErneeded to be adapted. This adaptation is calledTRACEr-MAR and has so far been used during a maritime accident report review exercise in order to identify areas in which the HMI can potentially be improved. This paper introduces the adapted TRACEr-MAR framework and discusses the lessons learned through presenting results from an application case.