Finally I will start to find the shapes for some bulkheads. I know that I will want bulkheads at the three points where the deck level changes, so those seem like good ones to start with.
I start by making the inboard profile image visible, since it shows the internal structure. Via the construction menu, I create an offset plane at the point where the forecastle deck drops down to the main deck. It’s 52.7 mm back from the forward perpendicular.