I'm sorry acelanceloet, but I have to disagree.
If it looks like that in real life, why do it any different in the drawing? After all, isn't the whole idea to capture the essence of the ship?
because it looks like that due to the light. and the fun thing is, with light, we can angle it different and represent it different for our drawing
the point of sb is representing the ship as an technical thing, not an as realistic as possible art piece of it
that said, there is something to be said about darkening the shaded area underneath overhangs. I only say there is something to be said against it as well, so there is not an 'too dark' or 'not dark enough' compared to pictures, but there is an point where it is going to distract from the details underneath or from the rest of the drawing