Lert, on Aug 28 2012 - 13:03, said:
Both posters have it partially right.
Yes, the symbol is from ACT. No, it doesn't mean that that crewmember gets the ACT bonus. All crewmembers get the ACT bonus. That crewmember gets an additional bonus.
I am pretty sure that nope.
All crew members gets same amount of experience as tank did. [ X ]
Worse crew member will also get all the experience that tank earns, thus doubling his exp income. [ X*2 ]
Dead crew members gets their share reduced to 50%. Thus ATC allows for most often dying ( and not getting revived ) crew member ( so radio man ) gets same share as other tankers. [ X*2*0.5 = X*1 ]
Additionally in meantime bonus from Mentor is included, tho as it is just multiplication order of operations means nothing.
( you can note exact crew members experience before and after battle to see this in effect )