We discuss the hopeless business of describing the sea. Everyone sighs over its fantastic colours. The cynic observes that travel writers always write &lsquoazure waters&rsquo. The travel writer snaps that if you&rsquore going to do clichés then its turquoise waters and azure sky. Then we argue about travel writing and cynicism, and again about the colour of the sea. We would come to blows, but for that we&rsquod have to let go of our beers, and that&rsquos practically illegal on board a cruise ship.