Crew Review: Divers There are 4 Divers which all boost your dive/surface rate by one point. Divers A and D are in the free version. D is the best as it has no penalty to a stat, and C is next best as the penalty is to surface speed which rarely impacts combat. Dive rate is important because diving/rising is the easiest way to avoid torpedoes, it takes some practice to do and still hit ...