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    "Terminal 2," said the other girl.
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      In both cases, once a tank starts its engine or begins to move it can be detected much more easily due to the thermal signature and noise generated by its engine. The tank tracks across lands can be spotted from the air, and in the desert movement can stir up dust clouds several times the size of the tanks.
      How fortunate for governments that the people they administer don't think

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        My face started to fall.
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          A recently-stopped stationary tank has a considerable heat signature. Indeed even if the tank itself is hidden, for example behind a hill, it is still possible for a skilled operator to detect the tank from the column of warmer air above the tank.
          How fortunate for governments that the people they administer don't think

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            But then - a glimmer of hope!
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              This risk can be reduced somewhat by the use of thermal blankets which reduce the radiation of heat while the engine and tracks cool. Some camouflage nets are manufactured from unevenly distributed mix of materials with differing thermal properties, which are designed to "randomise" or at least reduce the regularity of the thermal signature of a tank.
              How fortunate for governments that the people they administer don't think

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                "Terminal 2 and 1 are next to each other," I pointed out. "We can still head to Terminal 1"
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                  Tanks are powered by a diesel or turbine engine of a power comparable to a diesel locomotive. From the outside a diesel powered tank smells, sounds, and feels quite like a diesel locomotive. The deep rumble of even a single tank can be heard a great distance on a quiet day, and the sharp diesel smell can be carried far downwind. When a tank stands still with engine running the land trembles around it.
                  How fortunate for governments that the people they administer don't think

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                    "I'm going to Terminal 1," said the man from South Yorkshire.
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                      When moving, the vibrations are greater. The acoustic and seismic signatures of multi-fuel engines are comparable. The acoustic signature of a turbine engine is much greater: its high-pitched whine can be much more easily distinguished from other sounds, near or far.
                      How fortunate for governments that the people they administer don't think

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