Theorists go on to say that the ship could have floated up to three hours longer and, because HMS Carpathia arrived to collect survivors less than two hours later there could have been minimal casualties and the majority of passengers would have survived. It is believed that locking all of the water under the head of the ship caused it to tip up and it essentially sunk itself, before dragging the rest of the boat down with it.
This theory was later proved wrong because tests have proven that, if the watertight doors were left open, the ship would have probably flipped over in the process about 30-40 minutes earlier than it actually did.
Theorists have also pointed out that, because the boiler rooms had already flooded, all electricity would have been lost and even if the ship was still upright then it would be incredibly hard to leave an unstable ship in the dark. The lifeboats would have been almost impossible to launch so, in the end, Captain Smith probably did make the right decision.