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Product profile

Tethys ONE

Tethys ONE is Tethys Robotics hybrid ROV/AUV for underwater inspection, mapping and operations in rough or turbid water. It combines pilot-controlled use w...

Facts

Company
Tethys Robotics
Product type
rov
Status
commercial
Website
https://www.tethys-robotics.ch/solution/underwater-drone

About Tethys ONE

Tethys ONE is a 35 kg underwater vehicle rated to 300 metres and designed to hold position in currents up to approximately 3.5 knots. It can operate through a tether at ranges of 400 metres or more, while hot-swappable batteries support roughly four hours of operation. Autonomous functions include repeatable area coverage, structure scanning, depth hold and distance lock.

Operators can pilot the robot directly for close inspection or use autonomous coverage and sonar-assisted mapping where visibility is poor. Modular cameras, sonar, lights and inspection sensors adapt the system to offshore wind, civil infrastructure, search and rescue and explosive-ordnance work. A ten-minute setup and compact control station allow deployment from smaller vessels without the cranes and containerised workshops used by conventional work-class ROVs.

Market context

hybrid_rov_auv, 2560, 1680, 659cbccb6d972677389e3b2a23900566d1627f9f850525951f1321542cdf411e, Inspection ROV, 1600x900, https://cdn.prod.website-files.com/651ec018e0c065289f0392b7/66c357a5cdd6ab918c5e788a_tethys-one_0306-Edit.jpg, https://www.tethys-robotics.ch/solution/underwater-drone, 2026-08-21, 16:9, products/media-audit/2026-08-21/tethys-one-official-16x9.jpg, 2026-07-30, official_exact_product_photo_16x9_crop, marine_underwater, exact_official_asset, Inspection ROV, marine_underwater, rov, marine_underwater

Summary

Type: Underwater robot

Core: Hybrid ROV/AUV

Function: Inspection

Audience: Marine operators

Specifications

control_mode
Pilot-controlled operation and autonomous modes
depth_rating
300 m
form_type
Hybrid ROV/AUV underwater drone
operating_environment
Difficult marine environments
operational_environment
Difficult marine environments
operational_role
Underwater inspection and mapping
payload_modularity
Modular payload support
runtime_h
4 hours with hot-swappable batteries h
sensor_payloads
Visual, sonar and ultrasonic inspection payloads
setup_time
10 min
stationary_current_rating
Up to 3.5 knots knots
weight
35 kg
wired_operating_range
400 m, extendable m

Operations

Environment
underwater, river, tidal_current, offshore
Primary user
marine_operator, inspection_team, defence_operator
Role
underwater_inspection, mapping, search_and_rescue, payload_operation
Interaction model
pilot_controlled_rov, autonomous_auv
Mobility class
hybrid_rov_auv
Product detail
hybrid_rov_auv, 2560, 1680, 659cbccb6d972677389e3b2a23900566d1627f9f850525951f1321542cdf411e, Inspection ROV, 1600x900, https://cdn.prod.website-files.com/651ec018e0c065289f0392b7/66c357a5cdd6ab918c5e788a_tethys-one_0306-Edit.jpg, https://www.tethys-robotics.ch/solution/underwater-drone, 2026-08-21, 16:9, products/media-audit/2026-08-21/tethys-one-official-16x9.jpg, 2026-07-30, official_exact_product_photo_16x9_crop, marine_underwater, exact_official_asset, Inspection ROV, marine_underwater,...

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