My ranking is based on their usefulness, and I'll be ranking them on a scale of 1 to 10, with 10 being the most useful.

I'll also tell you which tanks benefit most from which skills. I'm gonna go through all the crew skills in the game and rank them from best to worst. They can do anything between extending your view range, to letting you know you're spotted.

Original article by skills are an important part of the game.