Dabi doesn't take them seriously at all. As far as he's concerned, they're enemies and he'll try to kill any of them that show themselves physically long enough to take a shot. But he'll keep those thoughts to himself as he moves along, ready to get out of the water. It's gonna be a wet slog once they get back to the beach.

"I'll be at the Sapling." When he's able to, Dabi uses the happenings around Trench to gather interesting things. So another plunge into the deep for a second ship isn't a bad idea. He nods when Nara'a mentions a second ship. "We can take on the second one." And maybe try their luck with a third later, but who knows how long the algae will last.