Tethys Robotics is an Unmanned Underwater Vehicle (UUV) developer founded by Christian Engler and fellow pioneering ETH Zurich students in 2019. Tethys aims to push boundaries for underwater exploration in Switzerland, where large waterways, including lakes and rivers, are abundant and contribute to the country’s hydroelectric industry. Since Tethys launched their flagship vehicle, the ‘SCUBA 2.0’ they have found further success with the recent release of ‘Proteus’, an omnidirectional ROV appointed with a stereo camera, depth sensor, IMU, SBL and sonar, certified to 300m depths.

Alongside their research partners ‘Armasuisse’, an armament procurement agency affiliated with Switzerland’s Federal Department of Defence, Tethys aims to produce UUVs for local authorities including the Swiss Explosive Ordnance Disposal (EOD) team. The vehicle applications will include rescue diver assistance through robotic interaction, 3D mapping of the seabed, ammunition recovery and search and recovery of underwater targets. Their technology will ultimately minimise risk to rescue divers conducting recovery missions by operating in harsh conditions unsafe for humans, including high currents, turbulence, long dive durations and extreme temperatures.

To assist in achieving these goals, Tethys have integrated Reach Robotics’s Reach Alpha Grabber to their Proteus UUV. Featuring adjustable grip force, active compliance for safe lifting of heavy, unbalanced objects and quick-change end effectors for mission specificity, the Alpha Grabber is a tough, versatile and proven solution for intervention in harsh subsea environments. In their own words, Tethys describes their success with the manipulator:

“With the Reach Alpha Grabber, we are now able to interact with the environment and the divers underwater. The combination of reliability and robustness of the grabber with the precision and manoeuvrability of the UUV pushes the frontiers of underwater operations. Furthermore, due to the depth rating of the Reach Alpha, we have no restrictions to operate in any lake or river of Switzerland.”

At Reach Robotics, we’re proud to be working alongside innovative ROV and UUV manufacturers globally to push the limits of underwater possibility. Alongside Tethys, we are striving to support the Special Recovery and Military EOD communities, develop versatile mission specific technology, and innovative robotic solutions.

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Command Pods

Command Pods are a pair of space mouse controllers comprising of left and right units. They are designed to attach to an ROV control tablet and allow full system control from one interface. The Command Pod configuration simplifies control of a dual-manipulator system as operators are able to intuitively control both arms, while still piloting the vehicle.
The joystick model allows for arms to be directed towards a target while the system automatically maps the arms configuration along that path.


Compatible with all Reach Robotics manipulators, the Master Arm controller is available in five and seven-function models to mimic your robotic arm. Achieve unparalleled precision and accuracy while undertaking complex tasks including:
  • Precise placement of probes for crack and corrosion monitoring.
  • Place and recover objects with unmatched dexterity and minimised
  • Attach hooks and shackles consistently.
  • Reach confined areas unreachable with lower degree-of-freedom manipulators
    and traditional control methods.