“I surpass even the highest mountain peak on land. No climb is too steep for me, no challenge too great. I can measure altitudes of up to 9,000 meters – mechanically. Nobody else is capable of doing that. Together, you and I are unstoppable.”
The red central hand indicates the altitude on the bidirectional rotating bezel, which carries a scale divided into 50-meter steps, up to 3,000 meters. One full clockwise rotation of the red central hand thus indicates a climb in altitude of 3,000 meters. During a climb, the small red hand of the subdial located at 3 o’clock continues to turn too, until, after three full rotations of the central hand, it arrives at its final destination of 9,000 meters above sea level.
Air pressure display
The Bivouac 9000 is also capable of displaying any changes in air pressure at the same altitude. The hectopascal (hPa) scale on the subdial located at 3 o’clock displays the current air pressure on a scale ranging from 1,013 to 300 hPa.
Together with the altimeter and air-pressure display, the dial also features a power-reserve indicator at 12 o’clock. This gives the wearer plenty of warning when the watch needs to be wound after the movement has been running for around 60 hours. The mechanism that drives this power-reserve indicator is designed in such a way that it carries out its complex task with as few components as possible, which makes it much more reliable.