The project is still in the early phases, but seeing as how an inertial navigation system is one of the engineering triumphs of the early 20th century, we’re eagerly awaiting any progress updates.

we explain the various navigation options to help you decide which one is right for you. What it is: A navigation system that ...

Currently, IST is determined, down to the millisecond, using GPS satellites linked to Coordinated Universal Time (UTC).