A method of controlling the flight of a missile by devices that respond to inertial forces(noun)
WordNet. Princeton University. 2010.
Use "inertial navigation" in a sentence
"The Hound Dog had an inertial navigation system, updated before launching by the B-52's system, and some models were fitted with anti-radar and terrain-following systems."
"ASN-131 precision inertial navigation system, and APN-224 pulse radar altimeter."