The device in accordance 1, characterized in that the indicating range for speed of {HEAD ~ change} in {TAIL ~ barometric pressure} is essentially between 5 and +5 hPa/h 
in
The device in accordance 1 , characterized in that the indicating range for speed of { HEAD ~ change } in { TAIL ~ barometric pressure } is essentially between 5 and +5 hPa / h
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH