ith not very large wave heights

"You get very large roll angles with not very large wave heights," says Blazejczyk.Supersized ships are more at risk of this. And container ships also have very large hatches on their decks, which means their overall structure is weaker than some other vessels and more susceptible to torsion, or twisting. "They're kind of like a shoebox with no lid," Blazejczyk adds. No problem in calm seas but, again, limiting when or where a ship sails likely also limits its usefulness.