I recall a relatively recent test of a scale craft built to the Biblical proportions, in a wave tank, somewhere in Asia, possibly Japan.
I’m recalling that the proportions were nearly ideal for preventing roll, pitch and yaw on rough seas, according to this research. Nearly ideally stable, in other words.
I vaguely recall something of that myself. I put it farther back than ‘relatively recent’, though. Yet ‘Nearly ideally stable’ doesn’t necessarily lend itself to navigable. And the Bible doesn’t address navigation of the Ark. Simply that it ‘floated, and ‘came to rest’. I suspect Noah and the crew had much more to attend to, and they were at God’s will in any event.