[Keith glanced around the room. He wasn't exactly a rogue either. "Space Ninja", sure, after his Blade experiences, but not a rogue of the thief variety. He frowned a bit and then moved over to where the rock had landed on the floor when he'd smashed it through the window.]

Breaking it might be our best bet. It's the faster option, at least, then trying to dig around finding a small key. Who knows how many other keys we'd find along with it?

[There could be dozens of locks on this boat between various chests and anything else. It was more time limit friendly to break it. He grabbed the rock and swam back over to her.]