
Roberts Digital Altimeter and Audio-Variometer
- Made:
- 1989
Roberts Digital Altimeter and Audio-Variometer, Mark IV, for hang-gliders, 1989. By Roberts Glider Instruments, Santa Barbara, California, USA.
Roberts Digital Altimeter and Audio-Variometer, Mark IV, for hang-gliders, 1989. By Roberts Glider Instruments, Santa Barbara, California, USA.