gonzo1124 Posted April 21, 2010 #1 Share Posted April 21, 2010 I do. I remember when ships had heavy, deep keels as ballast. Their draft was so deep they couldn't get into shallow ports, (remember the Cunard France always anchored outside St. Thomas bay?) It is my understanding that newer ships have more of a flat bottom instead of a pointy keel (and they draft shallower), then huge water holding tanks inside the hull act as ballast. These are controlled by computers to keep the ship level and up. Anyone knows more about this? Link to comment Share on other sites More sharing options...
Yo Eleven Posted April 21, 2010 #2 Share Posted April 21, 2010 I do. I remember when ships had heavy, deep keels as ballast. Their draft was so deep they couldn't get into shallow ports, (remember the Cunard France always anchored outside St. Thomas bay?)It is my understanding that newer ships have more of a flat bottom instead of a pointy keel (and they draft shallower), then huge water holding tanks inside the hull act as ballast. These are controlled by computers to keep the ship level and up. Anyone knows more about this? Actually an interesting question, but I don't have an answer. But I betcha Hank knows the answer? Perhaps ask him. :p CLICK ME!!!! :D Link to comment Share on other sites More sharing options...
dd2355 Posted April 21, 2010 #3 Share Posted April 21, 2010 But I betcha Hank knows the answer? Perhaps ask him. :p CLICK ME!!!! :D Marginally better than Cynthia McKinney, but still a state embarrassment. Props to the Admiral. I couldn't have held it together. (see vid @ 1:30) Link to comment Share on other sites More sharing options...
Nunu Posted April 21, 2010 #4 Share Posted April 21, 2010 I always assumed they did eventually tip over:confused: Link to comment Share on other sites More sharing options...
DocF Posted April 21, 2010 #5 Share Posted April 21, 2010 Fixed ballast, very wide beam, high cube design, water ballast, are all elements that combine to give a very stable ship with a draft of less than 26 feet in most cases. The deepest draft ship running until recently was the old Regal Empress which drew at least 32 feet. She was built in 1953, so that makes sense. The modern cruise ship is flat bottomed and slab sided. This is why they are very stable. A very good discussion about this aspect of ship design can be found in George W. Hilton's book Eastland: Legacy of the Titanic. The Eastland capsized in the Chicago River in 1915. It is out of print, but should be available at Amazon or ABE Books. Doc Link to comment Share on other sites More sharing options...
paper1122 Posted April 21, 2010 #6 Share Posted April 21, 2010 - Here is a video of very rough seas with a cruise ship. I also dug up this realic from the past http://boards.cruisecritic.com/showthread.php?t=154578 Link to comment Share on other sites More sharing options...
sarge98 Posted April 21, 2010 #7 Share Posted April 21, 2010 I do. I remember when ships had heavy, deep keels as ballast. Their draft was so deep they couldn't get into shallow ports, (remember the Cunard France always anchored outside St. Thomas bay?)It is my understanding that newer ships have more of a flat bottom instead of a pointy keel (and they draft shallower), then huge water holding tanks inside the hull act as ballast. These are controlled by computers to keep the ship level and up. Anyone knows more about this? If I remember right, believe it's called draft, the Valor goes 28' under the water line, 3 floors plus, and the engines are down there, very heavy.. Link to comment Share on other sites More sharing options...
MrCo9 Posted April 21, 2010 #8 Share Posted April 21, 2010 It's happened as recently as 2007. 2007 was NOT a good year. If your ship does go down, hopefully will be there to help. Link to comment Share on other sites More sharing options...
gaunerdog Posted April 21, 2010 #9 Share Posted April 21, 2010 I do. I remember when ships had heavy, deep keels as ballast. Their draft was so deep they couldn't get into shallow ports, (remember the Cunard France always anchored outside St. Thomas bay?)It is my understanding that newer ships have more of a flat bottom instead of a pointy keel (and they draft shallower), then huge water holding tanks inside the hull act as ballast. These are controlled by computers to keep the ship level and up. Anyone knows more about this? I think it is probably related to the concern that Congressmn Coleman made in a Congressional hearing a few weeks ago about the possibility of Guam tipping over because it would become too populated if we enlarge our military base there. The cruiseships are not islands so I'm sure they wouldn't tip over. Link to comment Share on other sites More sharing options...
idlenote Posted April 21, 2010 #10 Share Posted April 21, 2010 This is the real reason, you may wish the question had not been asked: http://en.wikipedia.org/wiki/Metacentric_height These ships are built of steel in the bottom, with the engines, fuel and ballast tanks down low to give lots of weight. The superstructures are aluminum and are basically huge empty spaces. Instant stability. Link to comment Share on other sites More sharing options...
golfadj Posted April 21, 2010 #11 Share Posted April 21, 2010 - Here is a video of very rough seas with a cruise ship. I also dug up this realic from the past http://boards.cruisecritic.com/showthread.php?t=154578 Wholly crap, half the passengers would have died of heart attack myself included. Link to comment Share on other sites More sharing options...
lillian marie Posted April 21, 2010 #12 Share Posted April 21, 2010 The financial liability would be enormous if modern ships were not built to be stable in even the worst seas. You're safe even in a hurricane as long as you don't get so drunk that you decide to take a nose dive off your balcony. Link to comment Share on other sites More sharing options...
Suite Travels Posted April 21, 2010 #13 Share Posted April 21, 2010 Crystal always tip's over. LOL:D Link to comment Share on other sites More sharing options...
Suite Travels Posted April 21, 2010 #14 Share Posted April 21, 2010 We have been through two hurricanes with Crystal and we all survived.:D Link to comment Share on other sites More sharing options...
Sun R Bunns Posted April 21, 2010 #15 Share Posted April 21, 2010 Marginally better than Cynthia McKinney, but still a state embarrassment. Props to the Admiral. I couldn't have held it together. (see vid @ 1:30) I want to deny I even live in Georgia!! What a disgrace for a political leader. And that stupid ass is going to draw retirement and health care plus all the other benefits that a congressman gets for THE REST OF HIS LIFE!! It's a pity one can't resend the appointment. Link to comment Share on other sites More sharing options...
misguidedangel Posted April 21, 2010 #16 Share Posted April 21, 2010 I suggest that on your next cruise you sign up for the Behind the Fun tour and you can ask the chief engineer that very question!!!! Link to comment Share on other sites More sharing options...
big_duck Posted April 21, 2010 #17 Share Posted April 21, 2010 The modern cruise ship is flat bottomed and slab sided. This is why they are very stable. And real beotch to handle at slow speeds in high winds. Link to comment Share on other sites More sharing options...
jgmpuma Posted April 21, 2010 #18 Share Posted April 21, 2010 I mostly worry about my wife tipping over after all those DOD's. Link to comment Share on other sites More sharing options...
kzguns Posted April 21, 2010 #19 Share Posted April 21, 2010 Fixed ballast, very wide beam, high cube design, water ballast, are all elements that combine to give a very stable ship with a draft of less than 26 feet in most cases. The deepest draft ship running until recently was the old Regal Empress which drew at least 32 feet. She was built in 1953, so that makes sense. The modern cruise ship is flat bottomed and slab sided. This is why they are very stable. A very good discussion about this aspect of ship design can be found in George W. Hilton's book Eastland: Legacy of the Titanic. The Eastland capsized in the Chicago River in 1915. It is out of print, but should be available at Amazon or ABE Books. Doc My first cruise was on the regal empress when she was the caribe I back in 1989. Anyway like most have said here these ships have huge heavy keels google for some pics of some of these ships in dry dock you'll see. KZ Link to comment Share on other sites More sharing options...
elcuchio24 Posted April 21, 2010 #20 Share Posted April 21, 2010 It is exactly that wide, shallow hull that makes it more stable then deep keeled ships with shorter beams. Link to comment Share on other sites More sharing options...
WayTooCool Posted April 21, 2010 #21 Share Posted April 21, 2010 I want to deny I even live in Georgia!! What a disgrace for a political leader. And that stupid ass is going to draw retirement and health care plus all the other benefits that a congressman gets for THE REST OF HIS LIFE!! It's a pity one can't resend the appointment. Sun-R-Buns will be speaking for me today -- not only is THIS doofus getting all the bennies, but think of what Cynthia McKinney is getting as well -- for LIFE! and for what? For regularly embarrasing the very people she was supposed to represent . . . that's the list. Link to comment Share on other sites More sharing options...
MrPete Posted April 21, 2010 #22 Share Posted April 21, 2010 None of these formulas help me remembering being in a ship in the Pacific ocean, heading toward Hawaii, beginning to tip so bad the beds started sliding toward the door, as well as ALL THINGS LOOSE, emptying out pools, trashing the gift shops and liquor stores, as well as breaking a LOT of tableware dishes. But I'm here, so obviously, the ship eventually righted itself. :) Link to comment Share on other sites More sharing options...
dprg644 Posted April 21, 2010 #23 Share Posted April 21, 2010 - Here is a video of very rough seas with a cruise ship. Oh my God:eek: Made me sick just watching that. Link to comment Share on other sites More sharing options...
DanJ Posted April 21, 2010 #24 Share Posted April 21, 2010 - Here is a video of very rough seas with a cruise ship. That ship did actually sink. It had 35 or so crew members on board, and they were rescued by the coast guard off Virginia or thereabouts. The ship had been taking on water and lost it's engines. It was one of Premier Cruises ships when they went out of business 7 or 8 years ago. I remember watching one of those ship tour videos on the cabin TV and they said that everything you see of the ship sitting there next to the pier comprises something like 20% or so of the weight of the ship, with the rest being below the waterline. Link to comment Share on other sites More sharing options...
MrPete Posted April 21, 2010 #25 Share Posted April 21, 2010 That ship did actually sink. It had 35 or so crew members on board, and they were rescued by the coast guard off Virginia or thereabouts. The ship had been taking on water and lost it's engines. It was one of Premier Cruises ships when they went out of business 7 or 8 years ago. You're thinking of the SS Seabreeze, of the Dolphin Line. It sunk 10 years ago. That video is not the Seabreeze. Link to comment Share on other sites More sharing options...
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