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.

Road-mobile: a deployment mode for ICBMs where the missile is mounted on a wheeled or tracked transporter‑erector‑launcher that can travel on public roads, enabling movement and concealment.

Propellant consisting of a solid mixture of fuel and oxidizer, enabling long-term storage and immediate launch readiness.