Saudi Arabia allowed the plane to land and take off again.

This policy allows the entire plane to fill with smoke.

This allowed the plane to be able to carry one pilot and usually four passengers.

He said the previous rules allowed planes to fly about eight months between inspections.

This allows the plane to finish the job much faster which equals less money spent in the air.

There are also several airstrips in the park that allow chartered light planes.

But during both turns, the pilots inexplicably allowed the plane to keep losing altitude.

They could then allow planes to come closer than is now permitted, based on information about where they intend to go.

"Elevation," Knot agreed, and allowed the plane to dip lower.

That would allow planes safely to be closer both horizontally and vertically.