In one of the other topics someone (I believe Bridget) asked what it's like on a ship. I can't say how it is for all cruise lines, but I can talk specifically about Royal Caribbean. A lot of people don't typically associate ships with "good work" but there is in fact some good work out there. Now don't get me wrong, you're not going to find art onboard ships, but you can find some decent vegas-style shows. Onboard most of our ships (anything new than 98 or 99) we have lots and lots of fun toys. All of the scenery is controlled by a rigging computer which takes MIDI timecode (MIDI Bridge to convert SMPTE to MIDI, SMPTE received from Show Control computer). The fly space, orchestra pit, stage lifts, floor tracks are all fully automated. Lighting rigs are all intelligent and we run hog (II, III, PC, and iPC) consoles exclusively. Sound consoles vary from analog to digital, a few Euphonix consoles, some digital Yamaha consoles, and some analog Crest consoles. All video projections are controlled via show control with SMPTE timecode received from the MX 24-24. A lot of our ships also have human flying (flying by foy) in both the main theatre and studio b (ice rink).
Calling a production show onboard is very different from traditional theatre. Instead of calling each cue individually you're saying "timecode Go" at the top of the show, then simply getting clears from your stagehands if scenery is good to move. If something isn't clear you just take your hand off of the deadman. If everything's clear just sit back and relax!