This Aerospace Standard, (AS), specifies minimum performance standards for _____________ (Instrument or instrument systems) which are primarily intended for use with (vehicles capable of flight), ((fixed wing, rotary wing) aircraft)), (other special modifiers); (and whose purpose is to display _____________ information).
The purpose of this AIR is to provide recommendations for the minimum dimensions of characters and symbols used in aircraft instrument dials and panel displays as related to the conditions stated in para. 3. Numerous variables influence the legibility of aircraft instrument dial characters. This situation makes it very difficult, if not impossible, to establish an exact act of rules for optimizing all installations. Character size, one of the important considerations, can be optimized where adequate dial space exists. Usually this is not the case and the designer is faced with placing the information in a limited space while continuing to strive for error-free legibility. Appropriate minimum size requirements have been stated herein for guidance in air transport use.
This AS covers __________ which measure and display __________ or This AS covers __________ basic types of (no capitals) instruments as follows: Note: Each type number to be followed by a brief description as it would if the scope were covering only a single type. As many types as required may be used.