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SeaCAT - integrated solution for unmanned

inspection of offshore infrastructures

The objective of the SEACAT project was to develop a sea going unmanned surface vehicle (USV) capable of deploying an inspection class ROV to support coastal and continental shelf offshore operations.

The SEACAT is a system developed primarily to perform open sea survey operations with minimum crew and limited vessel assets. Main targeted applications are pipeline touch down point (TDP) monitoring, FPSO hulls, risers and mooring inspection, site pre and post surveys, jacket inspection in shallow waters and down to 300 m (continental shelf). The spread is also well suited for offshore Marine Renewables Energy structures inspection. The concept is based on a catamaran hull capable to carry an important payload. The advantages of the concept are no man at risk in hazardous areas, reduced mobilization and operational costs, operational flexibility and time saving, limited damage risk for targeted infrastructures and reduced environmental impact compared to traditional spreads. The system has been developed to match end users requirements, including an easy transport, an intuitive navigation and a quick and easy maintenance.

Harsh conditions

The SeaCAT system is specially designed for severe weather conditions (wind, waves, current, low visibility):
- UAV : over 50 knots wind
- USV : sea state 4-5 in operation, 6 in transit
- ROV : current up to 4.5 knots in all directions

Human safety

No operators at sea !
System piloted through WiFi (+ radio/satellite during transit)

Environmental impact

The SeaCAT USV fuel consumption is under 100 liters per day, i.e. 20 to 50 times less than conventional DP survey/ROV vessels.

Inspection above/below water

The SeaCAT system is a multi-drone combination:
-1 UAV for the aerial parts
-1 USV for the seabed survey
-1 ROV for the submerged structures

Risk for infrastructures

The SeaCAT USV is a light (1,075 Kg) and compact (6.83 m) vehicle presenting a very little threat for offshore structures. Besides, its peripheral rib tubes offer an efficient protection in case of accidental shock.

O&M costs

The SeaCAT requires only 6 onshore operators for 24/24 operations (3 x 8 hours shift), allowing a cost saving of 65 to 85% compared to conventional vessels.


SUBSEA TECH
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