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Ferranti Bloodhound Inertial Guidance System.


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excerpt from a report "explaining" operation of the Ferranti Bloodhound Inertial Guidance System (read carefully)

The missile knows where it is at all times. It knows this because it knows where it isn't. By subtracting where it is from where it isn't (Or where it isn't from where it is, depending on which is the greater) it obtains a difference or deviation. The guidance sub-system uses deviation to generate corrective commands to drive the missile from the position where it is to the position where it isn't. The missile arrives at the position where it wasn't, consequently the position where it was is now the position where it isn't. In the event that the position where it is now is not the same as the position where it originally wasn't the system has acquired a variation, the variation being the difference between where the missile is and where the missile wasn't. If the variation is considered to be a significant factor it too may be corrected by the inertial guidance system. Moreover, the missile must now know where it was also. The "Thought Process" of the missile is as follows: Because a variation has modified some of the information which the missile had obtained, it is not sure where it is. However, it is sure where it isn't and it knows where it was. It now subtracts where it should be from where it wasn't (or vice versa) and by differentiating this from the algebraic difference between where it shouldn't be and where it was, it is able to obtain the difference between it's deviation and it's variation, this difference being called the Error.

The company also produces an extremely accurate command guidance system, however this type of guidance doesn't lend itself to so simple an explanation.

also the dialog in the background of "Timebomb" off Meat Beat Manifesto's "..In Dub"

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