Close Encounters

Publisher's blurb In this game, you are situated at the center of a target area for a UFO. The program assigns coordinates 0,0 to your location. You are given information as to the course of the UFO in degrees longitude and degrees latitude and also its speed. You then have two alternatives. Once, you can attempt to shoot the UFO out of the sky with an ICBM or you can do nothing and hope that air friction will cause the course of the UFO to deviate or to burn up.