'Sea' in the Bible

When He set for the sea its boundarySo that the water would not transgress His command,When He marked out the foundations of the earth;

And you will be like one who lies down in the middle of the sea,Or like one who lies down on the top of a mast.

The way of an eagle in the sky,The way of a serpent on a rock,The way of a ship in the middle of the sea,And the way of a man with a maid.