Key Features

300m Depth

Explore up to 300 Metres

Long Endurance

Equipped with high-capacity batteries

Durable Build

Built for long-term use

Smart Control

CHASING compatible

Tethys Robotics Tethys One

Professional-grade ROV/AUV designed for industrial inspections in high-current, low-visibility environments.
Deployable in under 10 minutes, rated to 300 m depth, and capable of station-holding in currents up to 3.5 knots.
Modular payload system for sensors, sonars, manipulators and 3D mapping - ideal for hydropower, offshore, search & rescue and complex underwater operations.

Key Features

300m Depth

Explore up to 300 Metres

Long Endurance

Equipped with high-capacity batteries

Durable Build

Built for long-term use

Smart Control

CHASING compatible

Product variants

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Free UK Delivery - Orders Over £100

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Product Info

The Tethys One is a next-generation industrial ROV/AUV designed for professional inspections, mapping, and rescue in demanding underwater environments. Weighing only 35 kg, it deploys in under 10 minutes and operates down to 300 m depth while maintaining stable positioning in currents up to 3.5 knots. Its advanced navigation combines DVL and multi-sonar 720° awareness, enabling precise, autonomous scans and georeferenced mapping even in low visibility. The 4-axis manipulator performs diver-level tasks, while its modular system allows integration of custom payloads including NDT, CTD, magnetometers, and sonar sensors — ensuring adaptability across offshore, hydropower, and emergency applications.

Key Features

1. Autonomous Precision: Executes repeatable missions with position, depth, and distance locks for accurate 3D mapping.

2. Full 720° Awareness: Integrated DVL and sonar suite provides complete obstacle detection in murky or confined areas.

3. Stable in Currents: Holds position autonomously in flows up to 3.5 knots, perfect for river or tidal inspections.

4. Modular Payload System: Supports manipulators, sonar, CTD, magnetometers, and NDT tools for multi-mission flexibility.

Delivery

Free UK Delivery is available on all orders over £100.

Orders under £100 have a fixed delivery price of £8.

Delivery takes around 4-5 weeks to most UK addresses, except for in stock items, as below.

In-Stock Items Only - Delivery will be made in 2-3 working days. Next Day Delivery is also available to UK mainland addresses for £30 per order, order By 12pm, Mon to Fri to receive next day.

Conditions - Some locations outside mainland UK may incur additional charges, which are representative of the extra cost that we get charged by the courier. Delivery is available to Europe and some Worldwide locations. Contact us directly on sales@alphageouk.com if you need any help or have questions, before you order.

Product Specifications

Specification	Details
Dimensions	600 x 600 x 350mm
Weight	35kg
Max Depth	300m
Runtime	4 Hours
Current Resistance	Stationary in up to 3.5 knots
Deployment Time	10 Minutes
Awareness System	DVL + front/side sonar (720° coverage)
Manipulator	4-axis soft gripper

See it in Action

AlphaGeo

Why Choose AlphaGeo?

At AlphaGeo, we partner with the world’s leading manufacturers to bring you the highest-quality ROVs, commercial drones, UAVs, robotics, survey equipment, and advanced drone payloads — all designed for precision, performance, and reliability. As an official UK reseller, we combine global innovation with local expertise, offering competitive pricing, expert support, and fast delivery. Our dedicated team of industry specialists is always on hand to help you find the right solution for your mission - whether you’re exploring underwater, mapping from above, or conducting critical survey operations.

FAQs

Please read our FAQs page to find out more.

What does each product package include?

Each listing clearly states what’s included in the box (e.g. main unit, batteries, charger, cables, software license, spare parts, accessories). If you’re unsure, check the “Package Comparison” section of the product page or contact us for confirmation before purchase.

How long does delivery take, and when will my order ship?

UK deliveries: 2–5 business days under normal stock conditions.
Pre-order / backorder items: Typically around 4 weeks (or as otherwise specified).
Orders placed before 2 pm (weekdays) are dispatched the same day when in stock.
Free UK delivery is available for orders over £100.

What warranty and support do you offer?

Every product comes with a 12-month warranty covering manufacturing defects under normal use.
During the warranty, we provide repairs or replacement of faulty parts, as well as technical support.
After the warranty period, we continue to offer repair, servicing, and parts support.
Our UK repair centre handles original parts and full testing.

Can I get a demonstration, training or customized solution?

Yes - we offer product demonstrations (in person or virtually), webinars, and one-on-one training to help you get up to speed. We also custom-configure or adapt solutions (e.g. integrating sensors, payloads, alternate configurations) to suit your specific project needs.