Abstract
Driving a car or piloting a plane are both activities taking place in a dynamic and shared environment. Sharing the environment will generate more or less interactions between protagonists. Those interactions might modify the context. The awareness of such dynamic situation imply both to identify other's current action, and to anticipate their intentions. Through two studies, results confirm the building process underlying operator's situation awareness during the activity and presents new requirements for the future embarked information systems. (Author/publisher)