While in my LHS, I got this crazy idea of building all the AFV Club Gato class submarines so I started by getting the 1942 version. While reading the instruction sheet (quite simple though) I saw the the waterline is painted black and contrary to the normal waterline, it follows the line of the bulges on the side and is all black. I decided to surf and look for references. Lucky me I got several but it has different version of the painting. One has the straight line, one follows the bulge, and one has black horizontal surfaces. One even has a dark gray (half) and black waterline. So now I'm more confused than before. What is really the standard?