BT, also called the "Devil's Triangle", is famous for reports of ships and planes disappearing on the area without being found. However, there are plausible theories that explain such disappearances.
First is that the area exhibits violent weather such as short but intense storms, waterspouts (tornadoes on the sea), and freak waves that shoot up to 100m.
Second are the methane gas hydrates trapped on the sea floor, which when they explode, causes the water density to drop which can cause passing ships to sink.
The third is its topography, it goes from a gently sloping continental shelf to an extremely deep drop-off; where ships and/or planes that go down on the area aren't likely to be found.