ROV ALPHA 4
L’ALPHA 4 The ALPHA 4 is a compact, high-performance trenching ROV designed for post-lay inspection, burial, and maintenance of subsea power, telecom, and O&G umbilical cables.
Combining high installed power, operational flexibility, and dual operating modes (free-fly and tracked), the ALPHA 4 represents a benchmark solution for modern trenching operations at deep water depths.
Operational Capabilities:
• Trenching of power, telecom, and O&G umbilical cables
• Post-lay inspection and cable maintenance
• Operating modes: free-fly and tracked
• Installed power: 400 kW
• Operating depth: up to 2,000 m
Trenching Performance
• Maximum trenching depth: 2.5 m
• Maximum product diameter: 200 mm
• Trenching speed: up to 750 m/hr
• Speed on tracks: up to 2,400 m/hr
Main Technical Characteristics
• Length: 2,5 m
• Breadth: 200 mm
• Velocità di interramento: fino a 750 m/h
• Velocità su cingoli: fino a 2.400 m/h
Main features
• Dimensions:
– Length: 5.30 m
– Breadth: 4.00 m
– Height: 3.00 m
• Weight (in air): 12 tons
• Structure: AISI 316L stainless steel
• Piping and fittings: AISI 316 stainless steel
• Power: 400 kW
• Power supply: 500 kVA, 380/440 V, 50 Hz
Instrumentation and Systems
• Cameras: 8 Simec HD-SDI color zoom cameras
• Lighting: 9 LED lamps
• Sensors and instrumentation:
– 1 Tritech PA500 altimeter
– 12 pressure sensors
– 4 electrical Pan & Tilt units
– 1 TSS 440/350 Dualtrack system
• Automatic modes:
– Auto heading
– Auto tracks
– Auto depth
– Auto altitude
• Positioning system:
– 2 Kongsberg cNODE transponders
• Cable tracking system:
– TSS 440 and 350 Dualtrack
Jetting System
• Jetting tools:
– Rear tool with depressor
– Front jetting tool
• Jetting pumps:
– 2 pumps, 450 m³/h – 6 bar
Optional Survey Instrumentation
• Fiber optic compass: PNI Compass TCMXB
• Sonar profiler: BluePrint Oculus MD750d
• Bathymetric system: Valeport miniIPS
Shipboard Support
• Launch and recovery system: SMD C2777 AF A-Frame – 12.5 t
• Required deck space: 150 m²
• Onboard power supply: 1,000 kVA
• Operating crew: 8 personnel