Relation between Visual Search Strategy and Situation Awareness in Tower Control

To study the visual search strategy of tower controllers with different level of situation awareness,a tower control simulation eye movement experiment platform was built to conduct experiment.Three-dimensional situational awareness assessment technology(3D-SART) was used to evaluate the level of situational awareness of the tested subject.The fixation entropy rate and the number of fixation points in the interest area were introduced as eye movement indicators to analyze the visual search features of the tested subject.The results show that the number of fixation points of the tested subject with high situational awareness mainly concentrates in the air space monitoring area and the ground monitoring area,and their fixation entropy rate is significantly higher than that of the one with low situational awareness.The former allocates attention resources reasonably,shifts attention flexibly and has a larger scanning range,which has a higher visual search efficiency;the latter is the opposite.