I have a modification on this topic and would like to hear what others think:

I am interested in water survival. If you were in Steve Callahan’s place on his raft 800 miles out to sea in the south Pacific, would you carry water first or a shaving mirror? If you could only carry one or the other. Similar question: would you carry water or a container of gasoil (presumably for lighting signal fires)? The question I guess is, which is more important: water or visual signaling tools?

I am trying to pack the lightest kit I can and am having to make weight vs priority decisions.

Thanks!

Gene