Vertical lay for deepwater flexibles, umbilicals and submarine cable. A fixed 200 MT twin-tensioner tower for permanent installation, or the modular 120 MT DVLS-120 for any vessel of opportunity.
Choose by campaign and vessel: a fixed tower for the highest continuous line pull on a dedicated vessel, or a modular system that breaks down for freight and bolts onto any suitable deck. Final specification is confirmed during FEED.
Twin-tensioner tower for permanent installation on cable-lay and construction vessels.
Portable system for any vessel of opportunity. Available for rental or sale.
| Parameter | 200 MT Fixed VLS | DVLS-120 Modular |
|---|---|---|
| Installation | Fixed, host vessel | Modular, vessel of opportunity |
| Line pull / lay tension | 200 MT (twin tensioners summed) | 120 MT (dynamic) |
| Tensioners | Twin × 100 MT, four-track | 1 – 2 × 4-track |
| Lay speed | 0 – 0.8 m/s | 0 – 1,200 m/hr |
| Product | Submarine cables, umbilicals, flexibles | 50 – 700 mm OD |
| Height | 28 m (overall) | 29.4 m approx. |
| Footprint | 8.5 × 8.0 m approx. | 14.2 × 10.3 m approx. |
| Hang-off | Integrated, redundant | 125 MT clamp (dynamic) |
| Heave compensation | Optional AHC, ± 2.5 m | — |
| Class / design code | ABS / LRS (project-specific) | DNV-RP-0232 / DNV-ST-0378 |
A modular twin-tensioner vertical flexlay tower for permanent installation on a cable-lay or construction vessel. Two 100 MT four-track tensioners, each with 5 m contact length, are stacked across three operating decks in a 28 m tower over a 10 m arc.
| Total line pull | 200 MT (twin tensioners summed) |
|---|---|
| Tensioner configuration | Twin × 100 MT, four-track each, 5 m contact length |
| Tower height | 28 m (overall), 21.9 m to top deck |
| Arc diameter | 10.0 m (R 5000 mm) |
| Top jib crane | Integrated lifting jib above arc |
| Deck elevations | EL. 5.7 m · EL. 13.7 m · EL. 21.9 m |
| Base footprint | 8.5 × 8.0 m approx. |
| Lay depth | Up to 3,000 m |
| Configuration | Moonpool / stern / over-the-side |
| Hang-off system | Integrated, redundant |
| AHC option | ± 2.5 m, active heave compensation |
| Product range | Submarine cables, umbilicals, flexibles |
| Lay speed | 0 – 0.8 m/s |
| Class | ABS / LRS (project-specific) |
| Operations | Up to Hs 4.5 m |
The DVLS-120 turns flexible product from deck carousels, baskets or reel drives into the vertical plane for lay through the moonpool or over the side. Its modular steel structure breaks down for road and sea freight and bolts to deck grillage with sea-fastening brackets. Download the DVLS-120 datasheet (PDF).
| Maximum lay tension | 120 MT (dynamic) |
|---|---|
| Hang-off clamp capacity | 125 MT (dynamic) |
| Tensioner configuration | 1 – 2 × 4-track, 4 × 75 kW motors each |
| Product OD range | 50 – 700 mm |
| Top chute radius | 5.0 m @ 15 MT (low tension); fleeting ±15° |
| Lay / recovery speed | 0 – 1,200 m/hr |
| Maximum squeeze force | 150 MT (adjustable, load-cell controlled) |
| Overall envelope (L × B × H) | 14.2 × 10.3 × 29.4 m approx. |
| Total weight (excl. tensioner) | 185 MT |
| Tensioner weight | 74 MT each |
| Maximum single lift | 12 MT (excl. tensioner) |
| Work platform | 30 m² deck area, 1.5 MT/m² rating |
| Power supply | 1 × 55 kW HPU; 2 × 4 × 75 kW VFD panels, 440 VAC 60 Hz |
| Design code | DNV-RP-0232 / DNV-ST-0378 design appraisal |
| Mobilisation | Rental or sale; ex-Singapore / China, ~21-day mob/demob |
| Document no. | DIM-DVLS-120 |
Engineered, fabricated and load-test certified in-house, with offshore commissioning support from the Dimension team.
Designed and delivered to ABS, LRS or DNV requirements, project by project.
Abandonment & recovery and product hang-off systems are integrated in both builds.
HMI-driven sequencing with PLC interlocks on both builds.
Product is laid through the vessel moonpool or over the side.
Works with Dimension tensioners, carousels and deck winches, and with third-party equipment.
Available outright or for short-campaign rental, matched to campaign duration and vessel.
Render and CAD elevations of the fixed tower, showing the stacked tensioners, the 10 m arc with its top jib crane, and the three operating decks. Project-specific renderings are provided as part of the formal engineering submission.
From feasibility through commissioning — Dimension delivers in-house engineered marine equipment, backed by 14+ years of offshore operations.
