The AHRS gives you a little bit more than that...with the combination of gyros and accelerometers, it provides altitude, heading, and flight dynamics (roll, pitch, angle rate, and acceleration data).
AHRS is linked to the EFIS.
IRU is linked to the Flight Management Computer
(DC3 is my all time favorite ac...in SD there was a company that was retrofitting the interiors as corporate ac...some beautiful wood lined interiors...)
Last edited by FlightPathOBN; 29th Nov 2012 at 20:14.