If these were impractical for a particular target was an exquisite piece of technology called an inertial navigation system.

如果于特定目标不切实际的话，那就有一种被称惯性导航系统的妙技术。

Submersible pilots also rely upon a technique known as inertial navigation, using a system of accelerometers and gyroscopes to track their position and orientation in relation to a known starting point and velocity.

潜水飞行员还依靠一种被称惯性导航的技术，使用一个由加速度计和陀螺仪组成的系统来跟踪他们与已知起点和速度相关的位置和方向。

OceanGate's Titan submersible carries a state-of-the-art self-contained inertial navigation system which it combines with an acoustic sensor known as a Doppler Velocity Log to estimate the depth and speed of the vehicle relative to the sea floor.

海洋之门公司的泰坦潜水器携带了最先进的独立惯性导航系统，它结合了一个被称多普勒速度日志的声学传感器，以估计潜水器相于海底的深度和速度。