Make yourself an ark of gopher wood.  Make rooms in the ark, and cover it inside and out with pitch. (Genesis 6:14)

Jesus says that 

The word translated ark is תֵּבָה tebah and it means a box or chest, which is why it came to English translations in this fashion; ‘ark’ derives from the Anglo Saxon ærc for casket – as clearly, God only tasks Noah to build a sea-worthy vessel, not a boat or ship.