Incidental results of the selection in the middle of a river that has a big ship and the pier is located near the airport, which will make the area get assistance faster and have more chance of survival.
The reason of choosing the middle of the river, because that is a big ship and port located near the third position, which has been helping to make faster and more chance of surviving.
The reason of choosing down in the middle of the river, because it is a big ship and pier large 3 tha was near the get help fast and have a chance to survive.