One of his graphics shows that at the heart of the storm the roiling clouds rose to 20,000 feet above the flight path.
The flight path of the Air France Airbus A330 was known with some precision, as was the time of its disappearance.
The flight path remained close to the Indonesian archipelago, well within what is the normal reach of air traffic control radar.
For slight corrections in the flight path, small steering motors were utilized.
The blip representing Pickering had cut their flight path, slicing obliquely through their wake.
It was guided solely by the radio controlled servos, following a flight path previously determined by banks of computers.