All Cruise Guests Basically Eat the Same Things
Freezers on board Harmony of the Seas are the size of New York studio apartments—and stocking them is an art form. Before each sailing, the inventory team receives enough ingredients for 20 different dining venues, plus servings for the 2,000-member crew. (The total cost, including such other consumables as paper towels, is about $800,000.) Overestimate the order, and the voyage becomes less-profitable (and wasteful); underestimate, and you’ll risk a riot over coconut shrimp.

Luckily, passengers’ eating habits are fairly predictable. On the average week-long cruise, Royal Caribbean estimates its guests will be 80 percent American, consuming around 3,000 bottles of wine, 7,000 pounds of chicken breast, and almost 100,000 eggs.

If more than 80 percent of the guests are American, the crew orders extra ketchup. When the percentage of Chinese passengers increases, they bump up the supply of sliced fruit, seafood, and rice. Latin Americans consume more red meat and Coronas (which also requires additional limes). And family-prone Spring Break cruises require three times as many chicken nuggets. The one thing that never changes no matter who is on board? Toilet paper. Around 9,600 rolls are used each week. 

Every Ship Has an "Outbreak Prevention Plan," With a Hair Trigger
Nothing is scarier to cruisers than a Norovirus outbreak—which ship doctor De La Rosa says is almost always caused by a passenger who has brought the illness aboard, rather than poor sanitary conditions on the ship.

The U.S. Health Department requires that every ship maintain a detailed OPP, or Outbreak Prevention Plan. On Harmony, regular sanitary conditions are called “OPP1,” and they get ratcheted up to “OPP2” when there’s a “6 in 6,” or six passengers reported ill in six hours. (You’ll know OPP2 is in full gear when the crew gets less subliminal about its “wash your hands” messaging.)

If the incidence rate escalates and the situation reaches OPP3, guests lose the ability to handle their own food. The entire crew, from the ice dancers to the synchronized swimmers, is recruited to the buffets to help serve, and all restaurants and guestroom linens are put in red biohazard bags and obsessively laundered in a special facility on land.

If you want to avoid Norovirus like, well, the plague, stay away from short sailings, says figure skater and veteran crew member Chris Mabee. “Those trips tend to be the least-expensive, attracting both older passengers, who are prone to getting sick, and the young booze cruisers, who forget about hygiene.” 

As for the most common diagnoses at sea? They include upper respiratory infections, bruised bones, and the odd Viagra mishap. UTIs are also frequent, thanks to frisky honeymooners, and prescribing antibiotics can be hairy when passengers are committed to their all-you-can-drink packages.

Crew Members Are Trained to Deal with Handsy Passengers …
Sleeping with a passenger will get you “chicken or beef,” as Pavlov puts it—“That’s what a flight attendant asks you when you’re put on the first flight home.”

The zero-tolerance policy seems to be an industry-wide standard—at Royal Caribbean, there’s even staff training on how to defuse an escalating situation. More often than not, it’s a vacationing guest trying to seduce a crew member. “Whenever I take photos with people, I always give a thumbs up,” notes Pavlov. “My hands are visible, so no one can claim any inappropriate behavior.” And with cameras covering virtually every nook and cranny of the ship, it’d be easier to rob a bank than take a bite of some forbidden fruit. (Though some crew members still use Grindr or Tinder to get a sense of who’s on board.)