I understand what you both have said, sorry to bother you a lot, but my question was related to the anemometer in an aeroplane that measures the IAS. As you said previously, Keith. Williams., the anemometer is a differential pressure gauge which measures the difference between the total pressure and static pressure to get the dinamic pressure in order to calculate the IAS. Now what I want to clarify is that if we, for instance, takeoff and we'd set 250 knots airspeed straight away and not touch the throttle, the anemometer would eventually detect lower and lower pressure as we increase in altitude and this lower pressure would mean that this anemometer would show a lower IAS at a higher altitude, right?