True Altitude?

[Soldier_Fortune]

The OAT at MSL is 25 ºC for Crimea. Thus, the old chart remains useful in that map.
But, when it is used with winter maps, it just gets mislead the reader.

I've made a chart for OAT = -20 ºC, and I'm attaching it to this post.

Please: When you can, play a bomb mission using the Gulf of Finland Winter map, and observe how much 'feeling' you need to apply whether using the old chart and the latter.