2.60.1 Mission Planning, check Table MP-4, Expected Flak over Target.
In B-26 Flak Defenses depend upon your altitude. If your mission altitude is at 500
to 4500 feet you will be fired at by mostly Light Flak Guns. At 5000 to 7500
Medium Flak will fire at you and Heavy Flak Guns from 8000 to 15000 feet. Roll
also to see if your Target has Radar Directed Flak. Flip the Mission Chart over and
copy the details from the front page to the Flak Box on the right center of the
second page.