“…Although this method is widely used, questionnaires suffer from being subjective in nature; also, they give no indication of the portion of the FOV being used, and they do not reveal where attention is allocated within the visual field. For example, an evaluation conducted b Goodyear-Rediffusion (O'Neal, 1984) for the F-15 Visual System asked 48 pilots to perform certain tasks in L 1600 horizontal (H) X 600 vertica! (V) limited-FOV F-15 simulator, rate the FOV for each task, and estimate additional FOV requirements for tasks in which the FOV was rated less than acceptable.…”