| KNOB PURPOSE | FOR SETTING ZERO-SETTING SYSTEM |
| KNOB QUANTITY | 1 |
| OVERALL DEPTH | 5.000 INCHES NOMINAL |
| OVERALL HEIGHT | 3.500 INCHES NOMINAL |
| OVERALL WIDTH | 3.500 INCHES NOMINAL |
| MECHANICAL CONNECTION SIZE | 1/8 IN. |
| MECHANICAL CONNECTION TYPE | INTERNAL PIPE |
| MECHANICAL CONNECTION QUANTITY | 1 |
| MOUNTING METHOD | THREADED BEZEL |
| NONDEFINITIVE SPEC/STD DATA | AAU8A TYPE |
| POINTER FINISH | FLUORESCENT |
| POINTER QUANTITY | 2 AND 1 |
| SCALE QUANTITY | 3 |
| SCALE MARKING TRANSPARENCY | FLUORESCENT |
| SCALE MARKING | LETTERS AND NUMERALS AND LINED INCREMENTS |
| SCALE NAME | ALTITUDE |
| SCALE SMALLEST INCREMENT GRADUATION | 100 FT; 1000 FT; 10000 FT |