Titanic was designed with 16 air-tight compartments.Therefore,it was once called unsinkable ship.But an iceberg ruptured five of them,which was one more than designed.That's why it took less than three hours for Titanic to sink to the bottom of the sea after hitting an iceberg.Investigations afterwards found that Titanic had been sailing at high speed on dangerous waters before it hit the iceberg,but the life boats on the ship were only enough for half of its passengers and crew.Another reason is that Californian,the ship closest to the scene failed to come to rescue them because the radio operator was off duty and went to sleep.
分少的可怜呀,