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Although automated systems in an advanced cockpit have contributed to the enhancement of the safety, they have also increased the system’s complexity which can be a cause of inappropriate situation awareness (SA). In this paper, a supportive method for enhancing SA in the highly automated cockpit has been proposed, focusing on the following two points. One is to support in grasping the situation from a broader perspective which can contribute to the detection of SA errors and to better understanding of the system’s activities. The other is mitigating additional cognitive burden by supportive information. For the achievement of both an informative cockpit and the minimum additional cognitive burden, we explore the interface design for supporting SA in terms of improving information management by assisting the detection of unexpected conditions in the early stages of risky situation.