Abstract
AbstractApplying the existing domain model in ship domain research in a restricted area can be difficult owing to multiple factors that must be considered. This study presents a new domain model that can be applied in such environments. According to Endsley's theory of situation awareness, people have their own criteria in decision making based on factors such as individual and environmental factors. To investigate these factors, 125 seafarers were interviewed and threshold values based on their awareness were examined. The factors were evaluated as the closest points of approach. Domain modelling was performed based on these seafarer awareness values; then, the existing and awareness domains were compared, revealing that the awareness-based domain of seafarers is more affected by ship manoeuvrability than by ship size and speed, unlike the findings of existing domain research. Therefore, this study presents a new domain model that is both realistic and practical in a confined area, including various factors considered by seafarers based on the awareness values formed.
Highlights
Ship domain research is a crucial factor in marine safety; it includes the safe operation of ships, traffic diagnostic evaluation and collision avoidance (Rawson et al, 2014; Szlapczynski et al, 2018)
The SAvalue(s) of 125 seafarers sailing on the oceans were measured through the situation awareness (SA) subjective measurement method, following which the seafarers’ awareness values were quantified on the basis of three encountering situations
The awareness-based domain was constructed based on the SAvalue
Summary
Ship domain research is a crucial factor in marine safety; it includes the safe operation of ships, traffic diagnostic evaluation and collision avoidance (Rawson et al, 2014; Szlapczynski et al, 2018). The ship domain quantifies the safe distance of passage between a seafarer’s own ship and other ships in proximity; it identifies a safety area around the ship. Since the concept of ship domain was proposed, ship domain research has been performed using various methods (Liu et al, 2016; Szlapczynski and Szlapczynska, 2017; Im and Luong, 2019). There are several types of ship domain models; three types in particular are discussed below (Im and Luong, 2019)
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