I felt this chapter did a lot of good characterization work, had plenty happening. Perhaps a bit more characterization up front, though, instead of at the end of the chapter? Because novels aren't movies, or a visual medium, action tends not to be as exciting or engaging in and of itself. It's more the emotional context of that action that makes it interesting.
Actually...Hmm, okay, I know it can be obnoxious to make really specific suggestions, but I do have one! Consider a version of this chapter that starts with the crew first spotting the ship, and her beginning to lead her first raid. With that context, it creates greater tension in the reader. We understand that Marion is doing something for the first time, that she is proving herself. It plants the question in the readers mind: 'Will she succeed, or let down her crew due to her inexperience?' Just a thought if you ever want to go back and revise this.
Also, I admit I don't know that much about pirates, but I always thought a lot of the appeal of the traditional pirate was the freedom and democracy aspect. Votes on captains, stuff like that. It seems rather strange in that context that Marion is taking over for her father, which sounds vaguely aristocratic, with the title of captain being passed down to her due to her blood.
Generally, though, thought it was pretty good!