To dream of an ark represents your attempt to get through a very stressful or uncertain time with the intention of starting over. A wish to survive the worst moment of your life with only what you need. Protection or preservation of something important.
Starting your life over with only what you need. Surviving with what you need for a new beginning. Protection of fundamental needs to begin anew.
Example: A man dreamed of seeing Noah's ark submerged in water. In waking life he had to endure his father's funeral and the legal issues that came after with no assistance from his family. He had to drain all his own financial resources for a year while also trying to protect his new developing business.