Inertial navigation systems with moving platforms are engineering marvels and a fantastic example of human ingenuity. This video explains and shows how they use accelerometers, gimbals and gyroscopes to determine a vehicle's location, including the associated challenges they face such as transport wander and apparent drift.

Many thanks to Olaf for letting me use his footage!
https://www.youtube.com/user/olafzijnbuis

Read more about the LN-3 moving platform INS here: https://en.wikipedia.org/wiki/LN-3_inertial_navigation_system

Flight simulator footage included in Microsoft Flight Simulator 2020, X-Plane 11 and Digital Combat Simulator.

00:00 – Introduction
01:28 – Dead reckoning: the basics of inertial navigation
04:03 – Accelerometers and modern dead reckoning
06:37 – Using gyroscopes to stabilize the platform
08:49 – Apparent drift and transport walk

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