noun
inertial navigation system
Technical term used in aerospace, maritime, and defense contexts for navigation that relies on internal sensors rather than external references.
潜水艦は慣性航法を使って位置を把握する。
Submarines use inertial navigation systems to determine their position.
Compound of 慣性 (inertia) and 航法 (navigation), a direct translation of the English term 'inertial navigation'.