By the inspiration of PN guidance law, the equations of the pursue-escape geometry in the general form of the three dimensional space, are derived. This inspiration shows itself in the coordination which is selected for deriving the equations. Whenever these equations are derived in the other coordination, the complexity causes the difficulty of the analysis and the insight. When the equations are derived in the coordination which we name the LOS coordination, these are became so easy and expressive that give skilled tools for analysis and can open the ways for proposal of the modern guidance law. In particular, this issue display in the analysis and the reasoning of the PN guidance law which the important results were given.

Keywords: Pursue-escape, Proportional Navigation, Surface of Confront

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