Abstract: In an optical sight display for a fighter aircraft pilot training simulator, a performance monitor system is described as having a visual display for providing a pictorial representation (10) to a trainee's eye view (11) of real-time information. Electronic apparatus (31) such as a TV camera generates electrical signals responsive to visual images developed on a combining glass (13), and by means of a particularly described optical arrangement (lens 24, 27 & 30) when used with a fiber-optic bundle (29), the camera (31) is positioned remotely, out of the trainee's normal field-of-view. Due to the limited space in a fighter aircraft, this disclosed arrangement of component parts permit the generation of a substantially duplicate pictorial representation at an instructor's station for monitoring the performance of a trainee.