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OS-303 is a three-antenna GNSS receiver designed to determine a high-precision attitude. OS-303 is perfect for applications as hydrography, unmanned vehicles and other tasks requiring the determination of high-precision object's motion vector. 496 channels GPS: L1 C/A, L1/L2 P, L5 BeiDou: B1, B2, B3 GLONASS: L1, L2 Galileo: E1, E5a, E5b Three-antenna Azimuth: (0.2/R)° Roll or Pitch: (0.4/R)° 2SIM GSM/UHF* With the function of automatically switching to the most stable correction stream WebUI Easy setup and measurements in the browser of any of your device with Wi-Fi 8-32 GB* Internal memory up to 32GB -- High-precision trajectory for 2 minutes after the loss of satellite signals * - optional

OS-213 is a dual-antenna or three-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-213-INS is perfect for applications as hydrography, unmanned vehicles and other tasks requiring the determination of high-precision object's motion vector. 574 channels GPS: L1 C/A, L1/L2 P, L5 BeiDou: B1, B2, B3 GLONASS: L1, L2 Galileo: E1, E5a, E5b Dual-antenna Azimuth: (0.2/R)° Roll or Pitch: (0.4/R)° 2SIM GSM/UHF* With the function of automatically switching to the most stable correction stream WebUI Easy setup and measurements in the browser of any of your device with Wi-Fi 8-32 GB* Internal memory up to 32GB GNSS+INS High-precision trajectory for 2 minutes after the loss of satellite signals * - optional