Dreaming that you are in or see a boat means you ability to cope and express your emotions. Pay particular attention to the condition and state of the waters, whether is is calm or violent, clear or murky, etc. Are you "smooth sailing"? Alternatively, you may be ready to confront your unconscious and unknown aspects of yourself.  Dreaming that you are trying to jump off a boat, suggests that  you want to dive directly in and confront those difficult emotions and approach your  problems head on.