Rapid Work-Class ROV Support for an Offshore Cable-Lay Campaign

A subsea cable-laying contractor contacted Meritus late in its planning phase with a serious problem. The vessel schedule was fixed. A pre-lay grapnel run (PLGR), route clearance and as-laid inspection were mandatory. Its own ROV spread would not be available in time. It needed a work-class ROV on short-term lease, mobilised from China with LARS, TMS and crew support, within days rather than weeks.

The solution

Through our subsea partner network, Meritus identified a suitable deep-water work-class ROV package and aligned it with the vessel schedule and operational needs:

System selected on water depth, tooling and survey requirements
Flexible lease matched to the campaign duration
Mobilisation of ROV, TMS, LARS and spares coordinated to the vessel's sailing window
Technical interfaces aligned with the client's survey spread and the DP vessel's power and communications

The client completed PLGR, route clearance and post-lay inspection on time, without rescheduling the vessel or reducing inspection scope.

Key technical data

ROV: 115 kW (150 hp); depth rating 3,000 m; 2.95 × 1.90 × 1.85 m, about 4,300 kg; payload 420 kg with about 200 L internal free volume for tooling; seven thrusters; 5-function and 7-function hydraulic manipulators; two valve packs, each with ten bi-directional proportional valves (5 L/min); 220 VAC and 24 VDC supplies for sonar, USBL, altimeter and gyro; eight camera inputs and nine dimmable lights up to 1,500 W in total.

TMS: depth rating 3,000 m; 500 m tether, 40 mm diameter or less; SWL 12 t at the lift point and 10 t at the latch.

LARS: A-frame rated working load 10 t with a dynamic coefficient of 1.7; winch maximum load 150 kN with 3,300 m wire capacity.

This configuration gave enough power and payload for PLGR tools, route-clearance equipment and high-quality visual and survey inspection, while remaining efficient to mobilise.

Meritus Technology Shanghai
Email: sales@meritustech.com
Phone / WhatsApp: +86 134 8206 1802
www.meritustech.com