Old movie about a family going out to sea. Mother, father, & son, daughter does.nt go. They end up being stranded at sea, everyone gives up on them except the daughter, and she somehow finds them

Sounds like Survive the Savage Sea (TV 1992) (http://www.imdb.com/title/tt0105499/)
Here are some pictures (http://www.trailerfan.com/movie/survive_the_savage_sea/pictures)