I gave that one five stars after I looked up the terms "molded breadth" and "molded depth to maindeck". Turns out those are the right terms; my nautical vocabulary is a little lacking.

The only thing I'm not sure on is the max speed being improbable. That's what unwahrscheinlich means, but maybe "fantastic" or "incredible" is a better way to express the intent. I guess I don't know how fast an icebreaker goes. But Eisbrecher's Polarstern seems to be a considerable upgrade over the one owned by the Alfred Wegener Institute.