Knowing when to clear or update working memory is a necessary skill in ATC,where the controller must constantly be purging information that is no longer necessary and updating awareness of the current and projected traffic situations.

• 管制员必须知道什么时候应该清除或更新工作记忆，管制员要经常清理那些已经没用的信息，更新对当前和预计的空中交通情况的意识。