That might be the case - also, just for the serious - a less silly recommendation. This is what ballast does (sorta) and replacing the containers with water (i

That might be the case - also, just for the serious - a less silly recommendation. This is what ballast does (sorta) and replacing the containers with water (i.e. in inflatable reservoirs) that can quickly be pumped out might be a reasonable way to Inidiana Jones your way into tricking the rolling boulder and/or listing vessel.