Boeing developed a flying boat for the Maritime Self-Defense Force.

Boeing, which builds more than half the world's commercial airliners, is understandably keen to draw attention to what can go wrong besides planes.

A recent analysis by Boeing forecasts that unless safety is improved, jet airliners could be falling out of the sky at the rate of once a week by the year 2010.

Boeing has calculated the chances of a series of crew errors leading to CFIT.

The company's analysis shows that in over 60% of all accidents in the past ten years, the behavior of the flight crew was the dominant cause.

Boeing's safety experts have joined others in the industry to form an international task force to try to eliminate one particular kind of air crash known as controlled flight into terrain, CFIT.

By that, Boeing means that there may also have been other problems, but that an accident could have been avoided if the crew had done their job correctly.