Watertight compartments

Hello Lisa, getting a few written sources may be more helpful in this, and i'm hoping you have access to a library of some really good archives. "The Birth Of Titanic" written by Michael McCaughan would be a good place to start. Also, Titanic, An Illustrated History by Don Lynch and Ken Marschal as well as Titanic,Triumph and Tragedy(second Edition) by John P. Eaton and Charales A. Haas.

None of course are entirely lacking in faults, but they are good sources and Eaton And Haas 's work includes deck plans which identify staterooms by number. If you can get your hands on them, The Shipbuilder articals as well as the report issued by the British Board OF Trade are excellant sources of technical information, and the transcripts of both investigations is a must have. There's a link to the Titanic Inquiry Project which has the transcripts and reports which you can access through the links section here on ET.

If you prefer a vidio, the Discovery Channal offers two that you would find useful. One is Titanic, Anatomy Of A Disaster, and another is Titanic, Answers From The Abysss. I have both and I highly reccomend them.

In regards to the pumps, the total capacity of the pumps was 1700 tons per hour. When the Titanic sideswiped the iceberg, six compartments were opened to the sea at depths ranging from near the waterline to 15 feet below it. This opened only 12 square feet to the sea, but at the pressures which increase as the depth increases, the initial flooding rate was 7 tons per second. The watertight bulheads only went as high as E deck, and the deck was not watertight at all, so this allowed water to come up through deck openings, through bulkheads which had no watertight features and down through deck openings into the next compartments. The simple way of describing would be a nasty variation of the Domino Effect. As the mass of water inside the ship increased, the accumulated weight served to pull the bow down ever deeper until it was heavy enough to drag the whole ship down.

As to blocking the holes, no attempt was made nor could it be. When you have the equivalant of a 47 inch wide watermain blasting water in under full pressure, there was no way they could have pulled it off.

I hope you're not in any great hurry to give this lecture as this is a subject which is going to take some time to really do a good job of researching. Getting a hold of a naval architect or marine engineer would be a good idea. If there is any further way I can help, let me know.

Cordially,
Michael H. Standart
 
Hi All,
Titanic had watertight bulkheads but not watertight compartments. I think it is important to make the distinction between the two. The Great Eastern, as mentioned, had watertight compartments, which means it had watertight bulkheads that were topped by a watertight deck, thus creating a watertight compartment.
I have seen a cross-section of the GE (somewhere) and as well as the double hull that Joe mentioned I think it had 5 compartments, but the cross-section did not show how many latitudinal (is that a word?)divisions these compartments had.
In comparison to the GE the Titanic was actually very "sinkable". It is amazing when you consider the GE was built about 50 years before Titanic.
So Lisa, I think it is important to draw the students attention to the difference between bulkheads and compartments.
On the subject of compartments; the other day I was looking at a copy of the US senate hearing into the T disaster and Senator Smith is questioning Lightoller about the watertight compartments as though they were a place to seek refuge!! I think he said " did the passengers and crew know about these compartments" "did they seek out the watertight compartments as a last resort or an alternative to taking their chances in the open ocean"
I suppose he didn't have the ET message board to set himself straight!
By the way, what is Sansei and Yonsei?
I'm an Aussie, is that similar?

Andrew
 
Things are indeed becoming much clearer, thanks to everyone's very helpful comments. As Michael Standart recommends, I should also find myself a naval architect, although that may be difficult here in central Texas! And Mr. Standart, your reference to the failure of E deck to be watertight really explains a great deal of the problem. As you say, I'm trying to investigate the Titanic thoroughly before giving a lecture on it--it's a fascinating event for a wide variety of reasons, but also very complex, and I want to do it justice.
Thanks everyone!
 
Andrew,
"Sansei" is third generation Japanese-American, and "yonsei" is fourth generation. You may have heard of "issei" and "nisei," which is first and second generation. In Los Angeles, there is a huge "Nisei Week" celebration every year in the Little Tokyo area. Issei and Nisei were the ones interned in concentration camps during World War II, and there is much written about their experience. In 1990, each of them received $20,000 and an apology from then President George Bush. By the way, as an "Aussie" - - do you have any comments on the "S.S. Success" (see thread under "other ships and shipwrecks")?
 
Hi Lisa, and I'm sure you'll do fine. You don't become a professor at a collage without knowing how to check sources. BTW, Andrew is quite right about the decks not being watertight and the difference between watertight bulkheads and watertight compartments. Think of the bulkheads as being something of a dam, complete with an upper level over which the water may (and did!) overflow when it came up through the deck openings, then through bulkhead openings and down through more deck openings which weren't watertight at all.

Cordially,
Michael H. Standart
 
Hello All,

Speaking from experience there is no such thing as a water "tight" compartment. It may be able to hold it but only for so long. Then BOOM you loose a compartment or the ship.

Erik
 
Ok, one more stupid question! So if the bulkheads are capped off by a deck, in this case E Deck. How does the water get through this deck from the water tight compartment? Does the pressure of the incoming water explode through the floor? I'm just not sure I follow how the water goes up over the bulkhead if there is a deck in place on top of the compartent. Plus, why would it matter how high the bulkheads went? It seems if the water was going to somehow punch through the deck, it wouldn't matter how high they went. It seems that would only slow the sinking down a bit. Thanks in advance!
 
Hi Michael,

As soon as the Titanic struck the iceberg, water was flowing in at a rate of 7 tons per second. The water filled up the first bulkhead and went to the next and then the next and so on. Their was no stopping it. Think of it as a icecube tray, one to the next.

If the bulkheads had gone a deck or two higher, it might have saved the Titanic from sinking or she might stayed afloat a little longer in time for the Carpathia to arrive and rescue more passengers. Almost immediately after the Titanic sank, her sister ship the Olympic was recalled to Harland & Wolff in Belfast to raise the bulkheads higher than the Titanic's. (I think they were raised a deck higher, but I'll have to double check my sources for that).

When the third sister ship the Britannic was built 1914 she was given a double bottom and she could stay afloat with five compartments filled, so that a disaster that befelled the Titanic wouldn't also happen to the Britannic. If their ever was to be an unsinkable ship, this was it.

I hope I have explained enough!

Best regards,

Jason
 
Hi Michael.

I'm not sure if the bulkheads were sealed between the top of the bulkhead and the deck or not. However, the water can get through the upper deck because they weren't designed to seal off the water. From what I've read, and such, if you want to seal off the tops of the bulkhead with a deck, you have to deal with water pressure pushing up on the deck.

Also, like Jason had mentioned, it may or may not have made a difference if the bulkheads went higher. The reason they didn't go higher is because under conditions the ship was designed to handle, the pressure differential between the water on the outside and the inside of the hull would even out, and water would stop flowing in before the water had a chance to spill over.

One thing that I find really interesting is that at some point just after the sinking, it was calculated that either the Lusitania or Mauritania (I can't remember which) would have survived a similar scenario. Check out Edward Wilding's testimony ant the British Inquiry.

later.

-Dean
 
Hmmmm...now I have a reason to jump ahead in my transcripts. As to the bulkheads, there was no gap between the bulkheads and the decks, however, there were hatchways, and assorted openings IN the deck which were not designed to be watertight. What happened then was that the water welled up out of these openings and spread out through passageways to fall down into the comparments beyond through the ladderwells into the compartments below.

Cordially,
Michael H. Standart
 
Hi Mike,

Thank you for mentioning that unfortunately the Britannic sank faster than the Titanic in WW1, fifty mintues to be exact. I forgot to include that!

Best regards,

Jason
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To contribute to this discussion, I would direct you to my page on the subject at:

http://home.flash.net/~sparks12/steel.html

There is, in addition, relevent material at the bottom of another page:

http://home.flash.net/~sparks12/general.html

Hope this helps to dispel some of the myths surrounding the watertight compartments. You have to remember that passenger ships are not as compartmentalised as warships...as Susan pointed out, the added hassle for the passengers would not be economically viable.

Another facet of the 'watertight compartment' discussion: Senator Smith was not an expert on nautical matters, but he did do his homework. However, as an elected official, he also had to play to his constituents and the press. Several people had read about Titanic's watertight compartments in the newspapers and sent letters to Senator Smith, asking if people could have taken refuge in the "watertight compartments." He silenced those queries for good by asking the question during the Inquiry and having the answer recorded in the transcripts. If you'd like to know more about this, I would direct you to "Titanic : End of a Dream" by Wyn Craig Wade.

Parks
 
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