A fifth-generation jet fighter is a fighter aircraft classification used to encompass the most advanced generation of fighter aircraft. A fifth-generation jet fighter is designed to be much more technologically advanced than a fourth-generation fighter. The characteristics of fifth generation jet fighters are, defined by Lockheed Martin as having all-aspect stealth even when armed, Low Probability of Intercept Radar (LPIR), high-performance air frames, advanced avionics features, and highly integrated computer systems capable of networking with other elements within the theater of war for situational awareness.