Not sure I should be writing this, after what happened to Salvatore. The Captain caught wind of a mutiny, from Sal and some others, and Isabella gave him some new ideas on punishment.
He took five of them and stuffed them in barrels, then hauled them out past the breakers... as far out as he could get. Cracked a hole in each barrel, then kicked them overboard. From what that Isabella has said, it was far enough out that when they come back, they're likely to be Drowned... which is a fate that no sailor wants. Everyone's scared, not just of her, but of the hold she has on the Captain.
Now I see why Sal was so desperate to either escape or take over. I only hope I'm not next, after writing this down.