[As humans go, with his huge dilated pupils, L's nightvision is above average. When he was younger it was much better, even excellent, but in the last few years he's noticed some eye strain after reading, or staring too long at brightly backlit screens. His lifestyle hasn't been kind to him; it's kept him stunted in some ways, aged him before his time in others.]

Most definitely.

[He watches, with some interest, as Chin Yisou expertly utilizes something he's aware of in his own bag, but has felt too much unease to actively spend time getting to know it. It's like a mewling infant, or a wrinkled old man, all the most uncomfortable aspects of both combined into one uncanny creature.

He lets Chin Yisou overtake him, secretly grateful that he's no longer at the foremost risk of danger. He's used to having far more people between himself and danger, but one will do where none is the alternative. Stepping carefully, he tries to avoid the water that will soak his canvas sneakers in an instant if he stumbles or strays into it.]

Not necessarily. There are reasons that a wrecked ship might not be evenly saturated or submerged... pockets of air in locked rooms, the weight of the water and other fixtures... it all affects balance and buoyancy. That said... holes in a ship are never precisely a good thing, especially if it's coming through the hull. I suspect our time on this vessel is limited.