navy ships rely on expert seamanship. they should have understood much sooner what was happening to them. tragedy for seven navy families. look, this cargo ship, when it hit the star board side ripped a hole below the water line. the sea flooded in. that s where the seven sailors drown. it could have been utter catastrophe, the damage so bad, navy officials say the ship could have sunk the entire crew of more than 100, could have been lost. poppy? generally, especially with a ship of this size, this many sailors, you would have a lot of things in place to warn way ahead of time that a collision was coming soon. reporter: that s sit. there are redundant systems, there are radars, there are sensors. there are, you know, what the navy calls human eyeballs, people on the bridge, out