Well, I mean I'm assuming this is asking me from the context that I'm saving someone emotionally close to me? Because if it was just 1 person vs. multiple people my answer would be the boat.

In the context that it is someone emotionally close to me, I would go with the boat anyway. I love my friends as my closest family but y'all I'm sorry I can't let a ship with dozens of people on it die in sacrifice for one person.

In the most ideal scenario, among the people on the ship, a lot of them can swim. Hopefully some of them can rescue the others while I rescue my friend, and then we can all idk fucking float until 911 boat edition comes to get us.