[CodeCat]

After some research I came to the following conclusion (for anyone who would like to know).

Within the vehicle tab, units are grouped according to type. True vehicles first, then aircraft (this includes vehicles with ConsideredAircraft=yes set), and ships last. Within each group (for every tab) units are ordered by Tech Level. So low tech levels go to the top, and higher ones are down lower. If two units have the same tech level, the one with the lower cost takes precedence over the other and thus goes higher in the list.

[DeeZeL]

good information but dont you think its too old..??

[Master_Fenring]

No, very useful. I have always wondered this myself. I could never figure it out though.

[Renegade]

It's old information, yes, but nice to have it written done like that...