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DarkNinjaPenguin t1_j8ugxup wrote

This is one of the reasons Titanic was classed as the biggest ship ever built at the time, despite being exactly the same length, breath and height as her older sister Olympic. Some open promenade decks on Olympic were covered over on Titanic, making them count as internal space, increasing her volume and her GRT (Gross Register Tonnage). But the ships were the same size, and both displaced approximately 52,000 tonnes.


theAusterityClinic OP t1_j8uj2lu wrote

One was the Corvette, which could NEVAH be confused with Titanic, the other...

> being exactly the length, breath and height

And that was the 1967 Pontiac Tempest Olympic


NeuHundred t1_j8yl3c9 wrote

And because BOTH ships were made by the White Star Line, were BOTH ships available in black?


listyraesder t1_j8vjuoo wrote

Titanic happened to be a few feet longer.


DarkNinjaPenguin t1_j8vmy85 wrote

There's something of an inconsistency in some sizes you can find online, but they were exactly the same size. The 3rd sister Britannic was physically a few feet bigger.


jh937hfiu3hrhv9 t1_j8udvl4 wrote

The ton is derived from the tun, the term applied to a cask of the largest capacity. This could contain a volume between 175 and 213 imperial gallons, which could weigh around 2,000 pounds and occupy some 60 cubic feet of space.

The tun (Old English: tunne, Latin: tunellus, Middle Latin: tunna) is an English unit of liquid volume (not weight), used for measuring wine, oil or honey. It is typically a large vat or vessel, most often holding 252 wine gallons, but occasionally other sizes were also used.

Edit: Copied from wikipedia.


TheRageDragon t1_j8v33gl wrote

I'm not fat, I've just put on some gross tonnage!


Ailly84 t1_j8uf5ku wrote

Well then. I learned something as well. I’ve always thought of gross tonnage and displacement as the same thing.


[deleted] t1_j8ul5vz wrote



WahooSS238 t1_j8uvlwr wrote

Depending on the ship, tonnage can mean either displacement mass, internal space, or carrying capacity.


AnusStapler t1_j8wbs7n wrote

Because there is no way of measuring the total weight of a ship. And if it was there, it's not relevant. They measure the "weight" of a ship in displacement, so the amount (tons) of water is displaces. This is usually mentioned under "normal displacement" which means fully bunkered, staffed and 2 thirds of supplies.

It implies that a ship "weighs" less if you put it in a huge vat of alcohol, as well.


GoGaslightYerself t1_j8wfu3y wrote

> It implies that a ship "weighs" less if you put it in a huge vat of alcohol, as well.

Yep, since alcohol is less dense than water, a ship floating in alcohol will sit deeper in alcohol than in water. Water density varies with salinity and temperature, too, so they have different Plimsoll or "load lines" painted on ships to estimate their weight in tropical fresh water (TF), freshwater (F), tropical saltwater (TF), summer temperate seawater (S), winter temperate seawater (W) or Winter North Atlantic (WNA)...a ship of a given weight will sit much higher in WNA water than TF water...


Hanswurst107 t1_j8x2cd9 wrote

So what's the difference between "total weight" and displacement in freshwater?


TacoCommand t1_j8xaebu wrote

Huh. That's a cool TIL. I honestly assumed gross tonnage meant the amount of water displaced.


fatuous_sobriquet t1_j8ugfx9 wrote

Inflammable means flammable? What a country!