Motion Compensated Cable Lay

Compensated Cable Laying Systems

A motion-compensated, dual-carousel lay spread that holds the cable catenary and touch-down point still while the vessel moves. Wider weather windows and less risk of cable damage on inter-array lay.

75 MTMax line pull, incl. dynamics
8 m × 8 mCompensation stroke
Ø 50 – 500 mmProduct OD
6,000 MTStorage, scalable to 9,000 MT
The System

One system, tailored per vessel

Figures below are for the standard system. Final specification is project-dependent, tailored to the host vessel and confirmed during FEED.

Compensated Cable Laying System, isometric render of the full deck spread
Standard configuration

Dual-Carousel Lay Spread

  • Dual carousel
  • 8 m × 8 m stroke
  • Electric rack & pinion
  • 75 MT line pull

Small motions of the overboarding chute become large swings in the catenary: the touch-down point shifts, cable drags across the seabed and waves along the catenary can overbend it. The system actively compensates the chute position so the catenary stays fixed in space while the vessel moves with the seaway.

  • Constant catenary tension throughout lay operations
  • Constant-tensioning chute keeps cable pre-tension steady during compensation moves
  • Cable buffer allows reduced vessel transit speed during quadrant deployment
  • Modular architecture for fast vessel mobilisation
Full specification
Maximum line pull (including dynamics)75 MT
Minimum product OD50 mm
Maximum product OD500 mm
Minimum bending radius (in tension)5 m
Compensation: longitudinal stroke8 m
Compensation: transverse stroke8 m
Compensation: drive systemElectric Rack & Pinion
Product storage capacity6,000 MT (scalable to 9,000 MT carousel)
Length58 m
Width13 m
Height6 m
System Features

How the system works

Active compensation, target-lane following and an adaptive quadrant work together to keep the cable safe from carousel to seabed.

Stationary touch-down point

The TDP stays fixed regardless of vessel motion, so cable is not dragged across the seabed, even when cornering.

Extended weather window

Limiting wave motion in the cable prevents overbending and keeps lay going when conventional spreads stand down.

Target-lane following

Holds a straight cable trajectory, simplifies cornering and places the cable more accurately on the target line.

Compensated quadrant with cursor

A cursor self-aligns the quadrant through the splash zone without inducing catenary variations.

Adaptive quadrant radius

The arm straightens from its MBR curve, so the quadrant is removed with the cable virtually on the seabed and less slack is needed than with flip-style designs.

Simultaneous operations

The next cable can be outfitted and initiated during lay, and dual tensioners spool two baskets or carousels at once in port.

System Renders

Engineered end-to-end

Project renders of the full lay spread: dual carousels, cable highway, travelling quadrant and the motion-compensation envelope. Final layout, dimensions and configuration are tailored to the host vessel and scope of work.

Storage
Dual synchronised carousels
Compensation
Overboarding chute and quadrant
Scope
Inter-array cable installation
Applications
Related Equipment

Often Paired Together

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