How do cruise ships get put in the water?

Cruise ship are no longer launched like in the old days, by sliding down wooden rollers or sideways as in your image into the sea. These days they are built in a dry dock and then at a float-out ceremony, the sea is allowed to flood the dry dock and then the ship is in the water.



Modern cruise ships are rarely "launched" with a giant splash like older vessels; instead, they are usually "floated out." Most mega-ships are built in a massive dry dock—a specialized basin that stays dry while the hull is constructed. When the exterior is water-tight, engineers slowly open valves to flood the dock with millions of gallons of water. Once the ship is buoyant, the "dock gate" is removed, and tugboats pull the vessel out to an "outfitting pier" for interior finishing. For smaller ships or those built on a slipway, a "mechanical launch" or "airbag launch" might be used, where the ship sits on massive rubber rollers that slowly guide it into the water. In 2026, the "float out" remains the gold standard because it subjects the massive, sensitive hull to the least amount of structural stress. The event is usually celebrated with a ceremony where a "godmother" breaks a bottle of champagne against the hull, marking the ship's first successful encounter with the sea before its final sea trials.

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Cruise ships are launched into the water using the float out technique. This means the cruise ship is built in a special dry dock – an open dock area which has been drained. Once the ship is ready, the dock is flooded with sea water and the ship simply floats out.

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Cruise ships may be huge, but the ocean is much, much bigger. The U-shaped hull of a cruise ship displaces thousands of tons of water, pushing it down and to the sides, but the ship doesn't sink because the density of the water pushes back against the ship, keeping it afloat.

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Keep in mind that the ocean is much larger than even the most gargantuan ships, so when the seas are rough, you can still feel movement — just less than if you're sailing on a 100-person yacht.

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Colossal vessels stay above water by displacing an amount of water equal to their mass (the wide, U-shaped hull helps with this). As the ship moves forward and pushes water away, the water is ceaselessly trying to return to fill the space, with an energy that forces the ship upward.

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Cruise lines drain their swimming pools at night to discourage guests from trying to enter the pool when it is closed. Draining the swimming pools each night also allows the cruise lines to replace the water with clean water and a drained swimming pool is safer if the weather is rough.

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As of Sep 27, 2023, the average annual pay for a Cruise Ship Worker in the United States is $49,005 a year. Just in case you need a simple salary calculator, that works out to be approximately $23.56 an hour. This is the equivalent of $942/week or $4,083/month.

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Water throughout the ship is filtered and treated equally on large oceangoing ships. On smaller ships and river cruise ships, there might be additional filtration systems in the galleys.

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Generally, the highest-paying jobs on cruise ships are held by officers, department heads, and those working on commission. However, many other variables affect earning potential, such as cruise line, ship size, clientele, tips awarded, and prior job experience. Contracts are another factor.

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Within the last 111 years, over 20 cruise ships and ocean liners have sunk.

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Do Cruise Ships Dump Sewage? Yes. To get into a few more specifics than above, the U.S. allows cruise ships to dump treated waste into the ocean if they are within three and a half miles from shore. Beyond that point, there are no restrictions for dumping untreated, raw sewage in U.S. ocean waters.

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The amount of experience, the level of education, the grades they received, location, and company all can determine the year's salary. In general, a cruise ship captain salary ranges between $54,000 and more than $100,000. This may seem like a low pay scale considering the responsibilities that come with the job.

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The average speed of a modern cruise ship is roughly 20 knots (23 miles per hour), with maximum speeds reaching about 30 knots (34.5 miles per hour). How fast a ship is able to sail depends on several factors, including the power of its engines, the weather and the conditions at sea.

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Some of the engines are always running, since the ship always needs power. Most of them are off in port, since we don't need propulsion (unless it's a tender port) and power demand is low due to most people being off the ship.

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Are cruise ships safe? Let's cut right to the chase: Yes, cruise ships are generally safe as long as you use common sense and remember that vessels are not impervious to accidents, illness or people who just don't know how to behave.

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Medical staff varies by ship size, but typically ships have a doctor and at least two nurses. The world's largest cruise ships may have two doctors and five or six nurses. River ships and small ships that hover close to shore have less staff since they can easily access health facilities on land.

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When a toilet is flushed on a cruise ship, the sewage travels to the onboard treatment plant. Here the waste is filtered before it enters an aeration chamber. The aeration chamber cleans the waste. It is then sterilized using UV light and released into the ocean when clean enough to do so.

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