I have read a few articles on the matter. I just want to clear up something...I have read that the water-tight doors stopped water from rising. However, they were not placed high enough....which caused a problem. My question is that I see how underwater the water-tight doors would close in the cargo holds, boiler rooms, engine rooms....But what about when that compartment fills? Would it not just rise to G Deck where it could spread. Unless the bulkheads had open and closing doors that are water-tight? If anyone knows, please let me know. Thanks.