On my ship the carpets had "swimming" fish printed on them. Follow the fish to go towards the front of the boat.

Also exits,stairs etc. were marked and with glow in the dark labels down at floor level ( just like a highrise) this allows one crawling under the smoke and in darkness to see them, those of us with lights anyways.....

Oh nobody point out the markings one had to pay attention and know what they were looking at, which leaves out most.