The crew skills descriptions do not give exact effect percentages. An explanation of how the math works for these skills I believe would be helpful with understanding how helpful a skill or perk is. These descriptions also refer to the possibility of training only a single crew member in a skill. The Xbox version doesn't doesn't support picking crew members that get training, your crew as a whole has the perk at a percentage or it doesn't. If there is a source for this information I would gladly help update this wiki, please advise how we can help. --SleepHmper:xbox (talk) 16:40, 9 September 2015 (UTC)
I realized that, I've been meaning to overhaul the page last month, but I'm in no way well versed in XBOX mechanics so I decided to hold off until I actually understand how it differs from PC.
The only source of info I currently have is the official guide, not sure how helpful it might be, but feel free to muck around. Everything you see on the wiki are products of trial and error. https://xbox.worldoftanks.com/en/content/about/game-guides/perks-skills-intro/ --Haswell:na (talk) 16:50, 9 September 2015 (UTC)