OS-203 is a dual-antenna GNSS receiver with an external inertial unit GKV-10*. It is designed to determine a high-precision attitude.

Internal loosely coupled GNSS+INS filter* provides stable high-precision trajectory for 2 minutes after the loss of satellite signals.

OS-203-INS is perfect for applications as hydrography, unmanned vehicles and other tasks requiring the determination of high-precision object's motion vector.