Effects of overlaid navigational information on seascape on ship crew performance

Many of marine accidents cause by the perception error during navigation watch. We developed a new navigation support system which expected to decrease cognitive workload of officer of the watch. The support system can project marine radar information onto head up display combiner which is placed on a compass. An experiment was carried out in order to evaluate the effectiveness of the support system. Seventeen subjects participated in the experiment who is asked to navigate vessel at PC-based ship bridge simulator. Eye fixation duration for under navigation task was measured as index for efficiency of the support system. As a result of this experiment, the statistical significance could not be found. However, there has been shown to be tendency towards extend the fixation duration for navigation watch with the support system as increase collision risk.