Thclimer
New member
I've recently acquired a used Thommen Classic Altimeter (27,000 Ft) with no instruction manual and was wondering if anyone could give me the basics on how to use it?
I’m aware of the outer ring which can be turned to reference your present altitude on the 0-3,000 scale but there seems to be another small portal which indicates by 1,000 ft increments. How does that change?
Thanks in advance.
I’m aware of the outer ring which can be turned to reference your present altitude on the 0-3,000 scale but there seems to be another small portal which indicates by 1,000 ft increments. How does that change?
Thanks in advance.