I have realized I am not that simple. I have my wife all the time at my back thinking I am writing to a lover in pprune. Therefore, I am me and my circumstances (=wife + children). That makes me complicated.
So, from a complicated point of view. IRS is composed on Gyros and accelerometers in order to feel the 3D movement and translate it to numbers. Then the first numbers they have are movement=Track and GS. From that and the initial position they obtain your change in position and estimate your new position until their wives (GPS+RNAV) tell them again where they really are because they were wrong again.
Not instant but a lot faster than me thinking.
Tailwinds
Last edited by ppppilot; 28th March 2008 at 17:04.
Reason: language ignorant