a ship is basically a big, hollow ball that displaces more water than it weighs. If the ship is well sealed, how can it ever sink???????
Reports are that last word from the ship is that it had lost power, was taking on water and had a 15 degree list.
A ship is designed to go bow first into waves. Without power, the wind will tend to turn the ship broadside to the waves. The waves will in short order break the ship apart, or roll it over.
Once a ships center of gravity exceeds a point that the center of lift (buoyancy)reaches a certain number of degrees the ship will roll on its back and the game is over. In normal conditions as a ship rolls the center of buoyancy acts as a stabilizing force and trys to right the ship. Once a critical number of degrees of list is exceeded it is no longer a stabilizing force and in fact without exception flip the ship and quickly. As the ship flips it becomes more and more unstable. It is quick. That ship now rest on the bottom of the ocean.
Pray for their crew, their odds are not good. Their are multiple ELTs (Emergency Locator Transmitters) on the vessel, life boats and in their life rafts. None are beeping, thus it is assured they are down.