A cable laying and maintenance ship, the KDDI CABLE INFINITY is equipped with ROV MARCAS-V.
MARCAS-V can dive to a maximum depth of 3,000 meters, and works for cable burial and maintenance.
The burial is performed by taking in a large amount of seawater, waterjetting it into the seabed, and digging a trench. The maximum burial depth is around 2 meters.
In addition, MARCAS-V is equipped with the most advanced navigation system, and is possible to switch track mode and scan mode according to the working area and situations.
(The MARCAS-V brochure is here.)
Specifications of MARCAS-V
| Max. Working Depth | 3,000m |
| Dimensions | Length: 4.5m with 1m jet tool 5.4m with 2m jet tool Height: 2.7m Width: 3.1m in track mode |
| Weight | In air: 8,700 kg(9,300 kg in track mode) In water: Neutral |
| Propulsion | Skid mode: 3 knots for horizontal 1.5 knots for vertical Track mode: 2,200 m/hr |
| Vehicle power | Total 300 HP(150 HP subsea electric motor x 2) |
| Thruster | 4 x 380mm hydraulic driven thruster 4 x 300mm hydraulic driven thruster |
| Max. Burial Depth | 2 m (depending on seabed soil condition) |
| Umbilical Cable | 3,300 m (steel armoured cable) |
MARCAS-V Operating Scene
1. MARCAS-V is lifted up by the Launch and Recovery System.
2. MARCAS-V is with Jetting Tool.
3. Control Room controling MARCAS-V
Watching a status of the seabed and cables by the subsea cameras or sonar of MARCAS-V, the ROV pilot controls MARCAS-V using the joystick in the control room of the KDDI PACIFIC LINK.