Tether base
Bend restrictor
Bend restrictors control bending of flexible pipelines, umbilicals and cables at rigid connection points, preventing damage during installation and operation by maintaining a defined minimum bending radius in subsea applications.
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Bend stiffener
Bend stiffeners protect flexible pipelines, umbilicals and cables at termination points, preventing failure caused by overbending during installation, retrieval and operation while maintaining manufacturer minimum bend radius requirements.
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Midwater arches
Midwater arches support flexible risers, umbilicals and cables as they rise from the seabed to the surface, maintaining position, depth and proximity.
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AIS is a global leader in the engineering, manufacture and application of insulation and passive fire protection systems, as well as buoyancy and SURF (subsea, umbilicals, risers and flowlines) products.
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    • We are an ambitious business, commited to embracing innovation and solving our customers' challenges.
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Tether base

Seabed anchoring system for tethered subsea lines

Tether base secures flexible risers and umbilicals to the seabed using a modular anchoring system, designed to withstand axial loads while enabling ROV connection and disconnection offshore operations.

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Benefits

Modular seabed anchoring with ROV access

The tether base connects to the tether clamp pad eyes and secures flexible risers and umbilicals to the seabed. Designed for high axial loads, its modular units can be assembled offshore and connected by ROV for flexible installation.

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Modular design
Modular units can be lifted individually and assembled offshore, allowing flexible configuration and easier installation using available vessel crane capacities and seabed docking systems.
Easy connection
Designed with pad eye interfaces allowing connection and disconnection by ROV, improving operational efficiency and reducing the need for diver intervention in subsea environments.
Corrosion protection
Manufactured from steel or concrete with corrosion protection systems to ensure long-term durability and reliable performance in harsh subsea seabed conditions.

Specifications

Applications

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The new AIS website is now live
With a fresh look and simple navigation, we are pleased to announce that the new AIS website is now live.
News
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October 1, 2026
AIS completes acquisition of Matrix Composites & Engineering
Marking the next phase of its growth strategy, AIS is delighted to announce that it has received all necessary approvals and completed the acquisition of Matrix Composites & Engineering, a leading Australian provider of advanced composite materials and subsea engineering solutions.
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July 23, 2026
LS Cable & System awards contract for Taiwan’s Fengmiao offshore wind project
NjordGuard cable protection systems will protect the inter-array cables for the project’s fixed-bottom wind turbines.
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