Yeah. A light would help. Maybe something like thermal imaging? Or night vision?

[He's aware that back home, there would be the likes of sharks and things down underwater. So he's already considering that they'd want to protect the drone if possible.]

Wouldn't want a shark or something to get at it, yeah. I was debating on maybe disguising it somehow? That'd be more work, though. And I figure the sooner we can check things out, the better.