Also, the only other floating craft called an ark was made of reeds.
Was it? Do tell.
quote:And when she could not longer hide him, she took for him an ark of bulrushes, and daubed it with slime and with pitch, and put the child therein; and she laid [it] in the flags by the river's brink.
That's the only other thing the Torah refers to as an 'Ark', and is probably what greentwiga's source was actually referring to.