To dream that you are in or see a boat, signifies 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". If the waters are rough, however, you need to work on this aspect of yourself.

Alternatively, you may be ready to confront your unconscious and unknown aspects of yourself.

To dream 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.