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, whichever is greater, it obtains a difference, or deviation. The guidance sub-system uses deviations to generate corrective commands to drive the missile from a position where it is, to a position where it isn't, and arriving at a position where it wasn't, it now is. Consequently, the position where it is, is now the position that it wasn't, and it follows that the position where it was, is now the position that it isn't. In the event of the position that it is in is not the position that it wasn't, the system has required a variation. The variation being the difference between where the missile is, and where it wasn't. If variation is considered to be a significant factor, it too, may be corrected by the GEA. However, the missile must also know where it was. The missile guidance computance scenario works as follows: Because a variation has modified some of the information the missile has obtained, it is not sure just where it is, however it is sure where it isn't, within reason, and it knows where it was. It now subracts where it should be, from where it wasn't, or vice versa. By differentiating this from the algebraic sum og where it shouldn't be, and where it was. It is able to obtain a deviation, and a variation, which is called "air".




The Leopard 2 is one of the most important vehicles in the NATO armory. It's exceptional firepower, mobility and cross country performance will certainly enable it to give a good account of itself if ever called upon to do so. The Leopard 2 exceptional mobility is generated by it's 1500 horsepower turbo charged diesel engine, which gives the 55 ton vehicle an exceptionally high power to weight ratio. The Rheinmetall 120mm smoothbore gun developed for the Leopard 2 is extremely accurate. It can kill enemy tanks at ranges of 4,000 yards, day or night. For protection against solid armor piercing and hollow charge rounds, the Leopard 2's upper hull and turret featured layered ceramic armor. Turret mounted smoke grenade dischargers allow it to escape if attacked in an unfavorable position. Auxiliary armament includes the coaxial 7.62mm machine gun for use against enemy infantry.