Ducks
This is because there is a larger amount of raw materials in the runaway reaction so the the reaction would effect all the other product line or batches that where all ready made or are in the process of being made. I think if I'm right you'll probably need this 4 GCSE course work. Then if you are check the Bhopal and t2 lab runway reaction video on you tube it may help you understand it a bit more.
Even emergency vehicles must contact the control tower.
Stop at the runway hold line, contact control tower via 2 way radio to ask for permission to enter/cross
At an airport with a control tower already have taxi clearance to cross all runways or get clearance from ATC to cross the runway. :)
Air control lands the plane. They also take the plane off, and pretty much get the plane from point A to B. As soon as they land and turn off the runway, Air control hands them off to ground control which brings them to the gate and from the gate to runway for take off again...
Stop at the runway hold line, contact the control tower via two-way radio to ask permission to enter/cross
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Emergency vehicles, such as fire trucks and ambulances, may be authorized to cross a runway without contacting the control tower in case of an emergency. These vehicles are trained to respond quickly to urgent situations and may have direct access to the runway to provide immediate assistance.
If you mean the light gun signals from the control tower- to vehicles, and aircraft on the ground, get off the runway. For aircraft in flight, runway is unsafe, do not land.
Stop, contact the control tower for permission to cross.
none of the above
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