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Topic review - World's largest cruise ship sets sail
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  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
wefalck wrote:
(because, for instance, they have to run their generators with cheap sulfurous oil, because harbours don't have enough energy to supply them), etc.


Ships cannot use fuel with a high sulfurous fuels in many harbours so it depends on your level of acceptable pollution... In any case, this small pic isn't very encouraging!

Image
Post Posted: Mon Apr 30, 2018 3:28 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Vlad wrote:
Admiral John Byng wrote:
Also, there are major design differences between a "cruise ship" like this and a "liner" e.g. QM2. The latter has different structural requirements to do with maintaining speed and seaworthiness in a heavy seaway (e.g. Atlantic crossing). The ships designed for summer cruisers in the Caribbean are built lighter.


The seaworthiness demands for cruise ships are in fact very strict and they have to be able to survive extreme wind and waves, also in case of a power failure. Plus, wave slamming is of particular concern, both bow wave and stern slamming (they tend to have flat after bodies).

So they can all do this





Note that these cruise ships are much much larger than the older liners and, similar to these very large container ships, are naturally a bit more flexible than shorter hulls. I've been told that modern cruise ships do not have hallways from end to end so that you can see them flex!



(The hard metal-to-metal noise in the background in this last clip is propeller cavitation)
Post Posted: Mon Apr 30, 2018 3:17 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
As fair weather ships, cruise liners' superstructure are lightly built.
Post Posted: Sun Apr 29, 2018 7:44 pm
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Well, on a liner the hull proper has a much greater freeboard, with the "squishy" cabins only starting higher up.
Post Posted: Sun Apr 29, 2018 3:23 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Vlad wrote:
Admiral John Byng wrote:
I assume the top-heavy look is just an illusion? There seems to be a lot of open space inside the superstructure.


These ships are surprisingly low displacement for their external dimensions, something ~100,000t which is comparable to the Nimitz class that actually is a fair bit shorter. It looks ridiculous but there's nothing heavy in all those apartments (or the space between them).

Also, there are major design differences between a "cruise ship" like this and a "liner" e.g. QM2. The latter has different structural requirements to do with maintaining speed and seaworthiness in a heavy seaway (e.g. Atlantic crossing). The ships designed for summer cruisers in the Caribbean are built lighter.


Thanks Vlad. I had wondered whether there was a difference between these and "proper" liners.
Post Posted: Sat Apr 28, 2018 1:34 pm
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
DavidP wrote:
is not wide enough for the cars to turn.


It might have a Go-Kart track too. :heh: :heh:
Post Posted: Sat Apr 28, 2018 12:54 pm
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
How about an on-board Formula-1 race track?
:wave_1:
Post Posted: Sat Apr 28, 2018 8:55 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Is there a dock for him?
Post Posted: Sat Apr 28, 2018 8:02 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Admiral John Byng wrote:
I assume the top-heavy look is just an illusion? There seems to be a lot of open space inside the superstructure.


These ships are surprisingly low displacement for their external dimensions, something ~100,000t which is comparable to the Nimitz class that actually is a fair bit shorter. It looks ridiculous but there's nothing heavy in all those apartments (or the space between them).

Also, there are major design differences between a "cruise ship" like this and a "liner" e.g. QM2. The latter has different structural requirements to do with maintaining speed and seaworthiness in a heavy seaway (e.g. Atlantic crossing). The ships designed for summer cruisers in the Caribbean are built lighter.
Post Posted: Sat Apr 28, 2018 3:59 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
They are an eye-sore, a nuisance for those who are swarmed by their tourists (think of Venice, Barcelona, ...), and an environmental threat (because, for instance, they have to run their generators with cheap sulfurous oil, because harbours don't have enough energy to supply them), etc.
Post Posted: Sat Apr 28, 2018 1:48 am
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Ice-bergs, anyone?? :whistle:
:wave_1:
Post Posted: Fri Apr 27, 2018 5:54 pm
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
Crazy ship.

My wife and I prefer the much smaller cruise liners, 600 - 1000 passengers, not these floating cities.
Post Posted: Fri Apr 27, 2018 5:06 pm
  Post subject:  Re: World's largest cruise ship sets sail  Reply with quote
I assume the top-heavy look is just an illusion? There seems to be a lot of open space inside the superstructure.
Post Posted: Fri Apr 27, 2018 3:43 pm
  Post subject:  World's largest cruise ship sets sail  Reply with quote
Thrillist

Quote:
The World's Biggest Cruise Ship Just Set Sail, and It's Straight-Up Bonkers
Thrillist
Matt Meltzer
6 hrs ago

It had been a while since I’d played Aliens vs. Robots. But nothing really bonds you with a group of complete strangers like strapping on a set of laser tag vests, running around in total darkness, and aimlessly shooting at people you’re not sure are your teammates or your enemies. So this was how I figured I’d make friends aboard Royal Caribbean’s new mega-ship, Symphony of the Seas.

I’d been tracking this amusement park on the high seas for a while now, anticipating the unknown once it actually launched. The new ship -- the world’s largest -- also boasts the world’s largest glow-in-the-dark laser tag arena. And as I found myself sailing alone I teamed up with a group of Chinese journalists, who spoke about as much English as I did Mandarin. We did find that the language of laser tag is universal, and as we stumbled around this massive, dark course together, shooting at whatever we could find, we laughed like kids. Then we did what new friends always do: tallied our kills together. D'awwww.

(...SNIPPED)
Post Posted: Fri Apr 27, 2018 10:08 am

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