This may sound dumb, but would swimming goggles help with avoiding getting smoke in the eyes (which would hinder navigation through smoke filled rooms)?

I see a lot of good stuff in these posts, but EDC (Every-Day-Carry) should be minimal in this environment. This is a cruise ship for folks on vacation having fun. A lot of the items I see in this thread would be good for a Go-Bag based kit that stays at the ready in your cabin/stateroom, but to carry all this stuff every time you leave your cabin would be extreme IMO. The idea is to relax and have a good time. My $.02, YMMV

Ships are chock full of electrical equipment and wiring.
It isn't just people smoking in bed - it's fan motors burning up and so forth.

In rush of water IS the outlier. Even in submarines we trained more often for fire than for leaking.

A smoke hood is more to protect your lungs from toxic smoke.
Seeing your way clear is nice but if you can't breathe to get there it won't matter much.

Its been a couple of decades since my last cruise, but I remember them being quite strict in what you can carry on. So, I'd probably bring an AA LED light by Underwater Kinetics or Pelican since they're dive rated and have long burn times and a whistle. Maybe a small SAK for 'cleaning my fingernails'.

This is true - having a ditch kit is good, having the basics (light and whistle) in your pockets is great and should be possible in anything more than speedos.

The rest is training/mental skills - don't panic and do what you are supposed to and the odds are very much in your favour

single cell CR123 LED light arrived yesterday, 110 lumens rated, ...impressive light for size (approx .85" x 3.25")...consider one, there are times that a key chain light is not enough

Streamlight ProTac 1L?

Mark_R... yes

I went on a 10-day Alaska cruise two years ago. I carried my Leatherman on my belt and a Surefire E2D clipped in my pocket. Every time I went through "security", I simply put both objects on the belt to get x-rayed. The only comment was by the security chief on about day seven. She commented that she really liked my flashlight, and that it was too bad that the security personnel could not carry them. Apparently, only "engineering" staff could carry lights, which were 2-AA MagLites in the nylon belt holsters. During a power failure, security was to find their way to the "emergency lanterns" that were stowed in some of the maintenance and storage areas. We both shook our heads at that.