I am unaware of any such description of the ark. I await your provision of a citation.
Length, breadth and height. That's a box.
No mention of a bow, a keel, or a rudder. It's not meant to navigate, but to passively float.
You shall make a window for the ark, and finish it to a cubit from the top
A window, navigating while only able to see in one direction, and that window is shuttered until the time to release the ravens and the dove. No bow, no stern no keel, it's designed to passively float.
It's a box.
Not just any box, but one whose ratios, 30:5:3, perform particularly well in a wave tank!
Extra Biblical, but I remember hearing that his neighbors ridiculed him for building such a large barn. A boat is built differently than a building. The would have notice curved beams for rib, and keel and ridiculed him for building a boat so very far from water.