Now, Whopity, about OAT....I just have to ask Corrected for what, exactly?
Corrected for Mach Number. Not really an issue at M=0.4.
Airspeeds work like this
(1) IAS, what you can see on the dial, which corrects for position errors (there's a graph in the back of the aircraft manual) to...
(2) CAS, which is what aircraft limitations are really in, which you can correct for compressibility (although don't bother below 10,000ft and M=0.6, the errors are trivial) to....
(3) EAS, which is what all the structural limits were worked out in, which corrects for density to....
(4) TAS, which is what the "V" term is in all the aerodynamics textbooks, and if you correct for wind you then get...
(5) Groundspeed!
G