For large GVD devices, the size of text for labels and detailed information on the screen should be based
on analyses of the maximum viewing distances of personnel.
Additional Information: The height of letters and numerals should typically not subtend less than 16 minutes of visual angle as measured at the maximum viewing distance. However, the maximum
viewing distance may be different for different types of information in the display. For example, labels and high-level status indications may require larger viewing distances (e.g., across the control room) while individual parameter values may require shorter viewing distances (e.g., must be legible from panels that contain the corresponding controls). Therefore, the determination of acceptable text size should consider the type of information and the context in which it will be used. 2090