[Well that answers one question he had. As delightful as the idea of something like Cornelia herself navigating the unseen depths in a tiny submarine sounds, an unmanned one is undoubtedly safer for an initial scouting.]

It sounds like a perfect place to start.

[Jeremiah means it, but particularly due to how she speaks. It's a glimpse of the energy he'd been used to seeing her carry around, now that she's got a footing somewhere; it's impossible not to be heartened by it, his smile wide.]

A craft with combat ability likely would be the best choice for a deeper dive. If there are things that are key to the functions of the island, I'd expect defenses to match.

[Leave it to him to sound more excited than concerned about that.]