I doubt it is for playability, but the FAC function makes sense though, I guess that's why it shows right under the target elevation above MSL in the HUD.
P.S. TekaTeka, I use several of your mods, keep up the good work! :thumbup:
Slantrange on the A-10 Hud is depicted in feet (pipper-arc), nautical miles (below the pipper) and in meters (lower left). Feet and nm seems obvious for US planes (and more than adequate) but why would I need slantrange in meters? :huh: