Is this a good story line?

i think it is a very good story...except perhaps...i am no expert, but isnt three a bit small to find her way to her father ship all on her own and hide...perhaps six would be a better age...just a suggestion. for the title i like Pirates Daughter. if i picked up a book with the title Child of the Seas, i would think she were a mermaid or something. but that is just me. good luck on your story....TLM