She is going to ignore rude sailors until they ignore her (and them, by association), focusing instead on standing next to the young man struggling with his sea legs. As in, not having them at all.

She glances to her left hand, where the anchor shard is burrowed deep but not flickering or glowing, and nods. "Hermione. Granger - Hermione Granger. That's my full name, but you can call me Hermione." She looks back to him. "What about you?"