A buddy of mine, long ago, once gave me surfing lessons.  I grew up near the ocean and was aware of its dangers.  Sure enough, my first time on a board, I ended up under water, spinning, trying to discern up from down.  We look at the Book of Revelation, specifically how it uses the Sea as a metaphor for the chaos of the world and the power of God.  From this we draw the bottom line: the true message of Revelation, written by John of Patmos, based on visions of his from his years of exile on that rocky island.