Name: クルーズ船がどんな天候でも直立したままでいられる方法 (That's How Cruise Ships Can Stay Upright in Any Weather)
Uploaded: 2021-01-14T09:23:54.000Z
Duration: 8 min 42 s
Description: VoiceTubeの動画で発音を聞きながら英語表現を覚えよう！学べる英語：

A majestic snow-white cruise ship looks like a piece of art.

再帰代名詞

It's a city in itself, with cafes, stores, swimming pools, gyms, and a water park.

Everything, from its impressive size to the number of passengers on board, leaves unprepared

The biggest mystery for some people, though, besides “What’s on the buffet?” is,

"How does this big guy stay afloat and avoid keeling over?"

Well, imagine something as large as the Empire State Building in length and 10 giraffes both

The weight of this thing equals the weight of 2,000 blue whales piled together.

Those are some pretty wacky comparisons I’ll admit.

(wow honey, looks like that thing is 10 giraffes high!

Okay, that’s it for the Mai tais for you today.)

So here, I'm really talking about the Symphony of the Seas.

With 22 restaurants, an ice rink, a 9-story zip line, robot bartenders, theaters, water

slides, and climbing walls, who’s got time to look at the water?

The thing can transport almost 7,000 passengers and more than 2,000 crew members!

But even if most of these people gather on one side, the ship won’t tip over.

It doesn't prevent people from worrying that at some unlucky moment, such a jumbo-ship

Look how tall and relatively narrow it is!

What these people don't know is that a cruise ship can roll to almost 60 degrees before

Plus, cruise ships are built to withstand 50-ft waves.

But you should know that such huge waves are a rarity, and a typical ship is unlikely to

come across one of those during its career.

Cruise ships are surprisingly well-prepared for all bad weather Mother Nature has in her

They're designed to handle even severe storms during the hurricane season.

Before construction, specialists make a ship scale model and put it through all kinds of

This way, they check how the future full-sized vessel will react in this or that situation.

But the question of the day is HOW cruise ships manage to stay afloat even in rough

Do they probably have a massive and heavy underwater part that helps them to keep the

Cruise ships have shallow and wide bottom surfaces.

Usually, no more than 30 ft of the vessel sits under the water, which is only about

These vessels are massive, a bit clumsy, and incredibly heavy.

Keep in mind that a cruise ship carries not only its own weight but also the weight of

at least several thousand passengers and crew members, all their luggage, food, furniture,

swimming pools filled with water, elevators, and whatnot.

But even loaded with all this hefty cargo, a vessel is still filled with air, which makes

When you place some object - be it a piece of wood or a huge cruise ship - in the water,

whether it sinks or floats will depend on its buoyancy.

And buoyancy is tightly linked with how dense the object is.

If it's denser than the water (like a stone), it will sink.

Now, one more thing: if you put a floating object on the surface of the water, it’ll

This pressure is what keeps the object from sinking.

The only difference between a cruise ship and a piece of wood is that the vessel sits

in the water way, way lower than the wood because of its immense weight.

Never mind that the piece of wood is not 10 giraffes high.

It doesn't explain why cruise ships don't tip over, though.

If you look at a cruise ship's hull, you'll notice its unusual shape: it's wide and rounded.

This helps the vessel to move smoothly and with minimal drag - that's a force which slows

It’s also a drag when the ship’s band is really really bad.

Round edges also increase the ship's stability, preventing the vessel from swaying and rocking

Even though a cruise ship towers above the surface, its center of gravity is far below

The heaviest equipment, engines, tanks with fuel, drinking water, and waste - all this

is at the very bottom of the ship, on the lowest decks.

And that's not all: among these bulky tanks and containers, there is something crucial

They contain water that can be pumped from one side of the ship or the other.

In case of an emergency or rough seas, it helps to keep the ship balanced, counter the

A large cruise ship usually has several ballast tanks.

So, buoyancy, low center of gravity, and ballast keep a cruise ship stable.

But there is one natural phenomenon that can still put this vessel at risk, and it's not

Surprisingly, experts say that no wind can be strong enough to cause a ship to turn over.

The danger I'm talking about is rogue waves.

These are the waves that can be twice as tall as others and come from any direction.

They appear out of nowhere, and no one can predict when and where they will pop up.

It's a good thing rogue waves are extremely rare, and the chances a cruise ship will meet

However, you ever see the movie “The Posidon Adventure”?

That fictional story is all about when a cruise ship and a rogue wave had lunch one day.

They say "better safe than sorry," and it's totally true about vessels and dangerous weather

Being equipped with plenty of modern gismos, cruise ships still try to avoid or outrun

any serious storm they're likely to come across.

Rerouting ships isn't something highly unusual.

Most cruise lines have an opportunity to observe all their ships in real time and change their

routes if there is a hurricane, typhoon, massive storm, or fog ahead.

Cruise ships can also change their itineraries.

For example, if the sea is too rough, a ship can skip a port altogether, dock at a different

port, or arrive several hours later than planned.

But if your ship hasn't managed to avoid bad weather, listen to the captain's instructions.