In this card we see a lady in a green dress standing on top of the water. On her head she balances a vessel with the symbol for water on it.
In this card we have the personification of the element according to Place. She rises out of the water and stands upon it. What is also interesting is that she is the missing caryatid (column sculpted like a woman) from the three of vessels. In the three of vessels the three women have vessels on their heads with the symbols for earth, air and fire and here in this card we have the symbol for water. In this card she doesn't not need the support of others, she stands alone and confident.
Because she stands upon the water she may have mastered the unconscious, or be confident with her intuition or psychic powers. I see this as a card of confidence. She is not afraid she will sink into the water. Also there is an element of balance, represented by the vessel on her head. Perhaps she needs to balance her emotions and intuition with the world around her.
Another way of looking at the card could be to see her as someone who is beginning the journey into the unconscious. She is new to the world of emotions and intuition and is taking her first tentative steps trying not to let her vessel (emotions) overflow.