It means that the dreamer has decided to take control of her/his own life. The person who sees a boat in a dream will now make all the decisions about her/his life and business alone and will show the people in her/his life how good she/he is in these decision-making. the dreamer takes the steering wheel under her/his control and does not leave the decisions about her/his future to anyone else. The dreamer takes the initiative, she/he wants to lead and live her/his own life regardless of the result.