Guidance system combining inertial navigation (self-contained motion tracking) with GPS (satellite-based positioning) for precise trajectory correction in ballistic missiles.

Relating to or using nuclear energy, typically fission, for propulsion or power generation in military vessels.

Silo-based: a launch configuration in which an intercontinental ballistic missile is stored and launched from a hardened underground silo.

Terminal guidance is the final phase of a missile’s flight in which onboard sensors (e.g., radar, infrared) actively steer the weapon to its target.

Relating to nuclear weapons that derive destructive power from both fission and fusion reactions, typically used in intercontinental ballistic missiles.