The purpose of this AIR is to provide recommendations for the minimum dimensions of characteris 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 considertions, can be optimized where adequate dial space exists. UIsually 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.
SAE AIR1093A-2002 Referenced Document
SAE ARP798-1965 Design Criteria for White Incandescent Lighted Aerospace Instruments
SAE AIR1093A-2002 history
2020SAE AIR1093B-2020 Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays
2008SAE AIR1093A-2008 Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays
2002SAE AIR1093A-2002 Numeral, Letter and Symbol Dimensions for Aircraft Instrument Displays
1991SAE AIR1093-1991 NUMERAL, LETTER AND SYMBOL DIMENSIONS FOR AIRCRAFT INSTRUMENT DISPLAYS
1969SAE AIR1093-1969 Numeral@ Letter and Symbol Dimensions for Aircraft Instrument Displays