Meaning of inertial guidance

iner'tial guid'ance

Pronunciation: [key]
— Navig. Navig.
  1. a guidance system for an aerospace vehicle, in which self-contained devices determine the vehicle's course on the basis of the directions and magnitudes of the accelerations it undergoes in flight. Also calledCf. celestial guidance, command guidance.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.