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ROV Accessories -  
ROV Tether

Welcome to Invocean: Your Ultimate Partner for High-End Subsea Tether and ROV Tether

At Invocean, we understand the increasing demands and the critical nature of Remotely Operated Vehicles (ROVs) in various industries such as underwater construction, surveillance, salvage, and scientific research. To support these high-performance tasks, ROVs and Micro-ROV's require reliable, durable, and efficient tethers. That's why we've crafted a new range of top-tier ROV tether, ROV Cable, Micro-ROV Tether and Underwater Drone Tether with our global partners. Leveraging advanced technology and premium-grade materials, our tethers assure superior functionality and longevity.



Your Range of Subsea Tether and ROV Tether Choices 

Twisted Pair Tether

Twisted pair tethers are a simple yet effective technology. They're made by interweaving two wires, which are used to send signals back and forth between a remote-controlled underwater vehicle, or ROV, and the surface above. This type of tether is commonly used in areas with shallow water because these locations often only need shorter lengths of tether.

The design of twisted pair tethers makes them both uncomplicated and reliable. One of the main reasons they're so popular is because they're not overly expensive to make. Additionally, they are usually more resistant to problems like signal loss or interference when compared to some other tether types.

However, it's also important to recognize their limitations. Twisted pair tethers don't offer a lot of bandwidth, which means they can't handle the transmission of larger data types. For instance, if you want to send high-definition video data, these tethers might not be the best choice because they just don't have the capacity for it. So, if you have larger data needs, you may need to look into using other types of tethers.

Fiber Optic Tether

As an alternative to the twisted pair technology, fiber optic tethers introduce a different mode of signal transmission. These tethers utilize an array of either glass or plastic fibers to carry the signals between the remotely operated underwater vehicle, known as an ROV, and the water's surface. As opposed to their twisted pair counterparts, fiber optic tethers are primarily employed in deep-sea explorations, where the required tether lengths tend to be considerably more extensive.

One of the most striking advantages associated with fiber optic tethers is their remarkable bandwidth capabilities. This feature facilitates the conveyance of larger data streams, such as high-definition video and various forms of sensor data, which would typically overwhelm the bandwidth capacity of a twisted pair tether. Furthermore, fiber optic tethers offer a commendable level of resistance to potential signal loss or any form of interference, a trait that augments their reliability, especially in harsh environmental conditions.

Despite these beneficial characteristics, it's worth noting that fiber optic tethers come with their own set of challenges. These tethers are notably more costly to produce than other tether types. Additionally, they necessitate the use of specialized equipment, both for their installation and for their ongoing maintenance. Therefore, it is crucial to handle these fiber optic tethers with care, given their higher investment cost and the specialized handling they require.

Neutral Buoyancy Tethers

Our Neutral Buoyancy Tethers are ingeniously designed with an optimized density, making your ROV excel in water for efficient and effortless maneuverability.

  • Diameter: Offered in diameters ranging from 4mm to 54mm.

  • Conductors: Copper conductors, with options from 4 to 8 conductors based on your power and data requirements.

  • Buoyancy Foam: Crafted with specialized Polyethylene foam with a density of 0.96 g/cm3.

  • Sheath Material: Polyurethane sheath for maximum durability and chemical resistance.

  • High Breaking Strength.

Zero Buoyancy Tethers

Our Zero Buoyancy Tethers offer precise stability underwater, best suited for operations requiring exact positioning of the ROV.

  • Diameter: Available in diameters ranging from 4mm to 57mm.

  • Conductors: High-quality copper conductors, ranging from 6 to 10 based on your needs.

  • Buoyancy Foam: Incorporated with high-precision Polyethylene foam with a density of 1.00 g/cm3.

  • Sheath Material: Ethylene Propylene Diene Monomer (EPDM) rubber sheath for maximum durability and heat resistance.

Positive Buoyancy Tethers

Designed to float on the water surface, our Positive Buoyancy Tethers are perfect for tasks involving surface operations.

  • Diameter: Offered in diameters ranging from 5mm to 39mm.

  • Conductors: Features high-conductivity copper conductors, with options from 4 to 6 conductors.

  • Buoyancy Foam: Crafted with specialized low-density Polyethylene foam with a density of 0.92 g/cm3.

  • Sheath Material: High-quality Polyethylene sheath for maximum durability and chemical resistance.

Negative Buoyancy Tethers

Our Negative Buoyancy Tethers add weight, keeping your ROV stable at its desired depth, perfect for ROVs that need to stay submerged.

  • Diameter: Available in diameters ranging from 4mm to 47mm.

  • Conductors: High-quality copper conductors, ranging from 6 to 10 based on your needs.

  • Buoyancy Foam: Incorporated with high-density Polyethylene foam with a density of 1.10 g/cm3.

  • Sheath Material: Ethylene Propylene Diene Monomer (EPDM) rubber sheath for maximum durability and heat resistance.

Each of our tethers is also enhanced with a Kevlar layer for increased mechanical strength, excellent insulation to prevent electrical leakage, and the capability to withstand extreme temperature ranges. With Invocean, you don't just get a product; you get a promise of quality and reliability.

Outstanding Technical Specifications

Our ROV tethers are crafted with a keen eye for detail and embody several exceptional technical characteristics.

  • Advanced Material: We use high-quality Polyethylene (PE) for the outer sheath of our tethers, ensuring high durability, UV resistance, and chemical resistance.

  • Excellent Conductivity: Our tethers are embedded with copper conductors, providing excellent electrical conductivity for smooth and uninterrupted transmission of power and data.

  • Robust Structure: Our tethers are designed with a robust layer of Kevlar for increased mechanical strength, resisting high tension and pressure while also preventing cable elongation.

  • Optimal Diameter: We offer different diameter options, allowing you to choose the best fit for your ROV's power and data requirements. The diameter can range from as small as 4mm to as large as 15mm.

  • Precise Buoyancy Control: Our subsea tethers are fitted with buoyancy foam, ensuring precise control over the buoyancy according to your requirements.

  • Superior Insulation: Each tether comes with top-notch insulation, effectively preventing electrical leakage and ensuring safety.

  • High Temperature Resistance: Our underwater tethers can withstand extreme temperature ranges, making them suitable for diverse environments.

  • Custom Lengths: Understanding the varying depth requirements, we offer tethers in custom lengths, from 25 meters to as long as 5000 meters, based on your needs.

Unmatched Quality and Standards

Invocean is dedicated to offering quality without compromise. All our subsea tethers are manufactured following strict quality control processes, ensuring they meet and surpass industry standards. Moreover, they are thoroughly tested for electrical properties, mechanical properties, and buoyancy before they reach you. This ensures that you receive the best product capable of withstanding demanding underwater conditions.

Why Choose Invocean

Invocean stands out in the market for several reasons.

  • Excellence in Innovation: We constantly invest in research and development, allowing us to innovate and improve our offerings continuously.

  • Customer Centric: We focus on understanding and addressing the unique needs of each customer.

  • Global Delivery: With a robust global distribution network, we deliver our products worldwide promptly.

  • Technical Support: We provide comprehensive technical support, ensuring smooth operations and customer satisfaction.

Let Invocean empower your ROV operations with high-quality, efficient, and reliable tethers. Connect with us today to explore our range and find the perfect match for your specific needs. You won't just be purchasing a tether; you'll be investing in a partnership that values your success as much as you do. Welcome to a seamless ROV experience with Invocean.


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Detailed ROV Tether Types and Specifications

Fathom Tether:

ROV Tether (by the meter): This professional-grade tether combines rugged strength and durability with high-performance electrical characteristics for wide-ranging ROV and subsea applications. Built with a polyurethane jacket for improved flexibility and better adhesion to potting materials. Available in lengths from 25m to 1000m.


Also see the ROV-Ready version of this product, which comes with a penetrator and connector installed.














Fathom ROV Tether (ROV-ready): This professional-grade neutrally buoyant tether combines rugged strength and durability with high-performance electrical characteristics for wide-ranging ROV and subsea applications. The tether comes in one or 4 twisted pairs with a pre-installed Binder 770 connector and WetLink Penetrator. Available in lengths from 25m to 300m.







High-Power Tether Cable with Connectors for OTPS: This tether is for use with the Outland Technology Power Supply. It’s specially designed for the power supply system and has five twisted pairs of wire with varying sizes to carry power, data, and auxiliary signals. Surface and subsea connectors allow it to be detached at both ends! Available in lengths from 125m to 250m.

This tether has five unshielded twisted pairs (UTP) of wire. Unlike our other tethers, each pair has a different wire gauge depending on how it is used:

  • 2 x 23AWG UTP: Red and black, used for power transmission

  • 1 x 24AWG UTP: Green, used for earth ground connection

  • 2 x 26AWG UTP: Blue, used for Fathom-X signal, and orange, available for auxiliary uses







Partner with Invocean
Join us in powering the future of underwater exploration and ROV Tether and Underwater Drone Tethers. Whether you're an ROV manufacturer, a marine research institution, or an underwater service provider, we invite you to experience the difference that Invocean tethers and cables can make. Contact us today to learn more about our products and tether capabilities.

Invocean - Dive Deeper, Stay Longer, Discover More.

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