According to Genesis, Noah placed the Ark’s opening one cubit above it.
Genesis 6:16 describes the vessel’s design: it was to have a roof or opening, rooms inside, and three decks. English translations differ in how they punctuate and interpret the Hebrew wording, but the passage includes the measurement of one cubit in connection with the opening or roof structure.
This detail is easy to confuse with the Ark’s overall height, which Genesis gives as 30 cubits. It is also separate from the 300-cubit length and 50-cubit width. The one-cubit measurement refers to the upper opening arrangement, not to a door, mast, or the vessel’s wall height.
Because the Hebrew construction is unusual, translations vary in their exact phrasing. The answer follows the traditional English rendering of Genesis 6:16, while acknowledging that the architectural detail is among the passage’s more debated translation points.