Re: Whats this ?
With clockwork portability (not to mention reliability) i can see how this would be of use for diagnosing a suspect altimeter (cruise at an {indicated} height for 20 minutes, climb 5,000' and repeat)
Max altitude of 8,000m is probably an admission of how unreliable readings can be at higher altitudes.
Not something that should be in a skip..
Dave
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