Standard travel kit ( even for cruise boats) includes:
Fleece jacket
flashlight
book
power bars
caffeine source
camera
tiny FAK
cash
tiny sak
This is about all you can get onto a cruise ship anyway. They run you through airport-like customs upon embark and debarkation. It would be nice to have bottled water with the possibility of water-borne pathogens that cruises are susceptible to...especially when equipment is down.
Can't take a spyderco or swiss army knife,etc, on a cruise ship? Really?
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What's so funny 'bout peace, love, and understanding?