DSV MAZU
Semi-Submersible Diving Support Vessel (DSV) MAZU
A Proven Offshore Construction & Deep-Water Diving Platform
The Semi-Submersible DSV MAZU is a fully equipped, dynamically positioned offshore support vessel designed for complex diving, construction, inspection, repair, and maintenance (IRM) operations in demanding offshore environments. Originally built at Götaverken Arendal (Sweden) and continuously upgraded, MAZU combines robust Scandinavian engineering with modern offshore systems and high personnel capacity.
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Vessel Overview
• Vessel Type: Semi-Submersible Diving Support Vessel (DSV)
• Design: Enhanced GVA 2000 – Multipurpose Support Vessel
• Year Built: 1983
• IMO: 8117823
• Flag: Mexico
• Home Port: Ciudad del Carmen
• Owner: Nestar Energies Ltd.
• Operator: AM-UM Inc.
• Classification: Lloyd’s Register
• DP Class: DP (AA) – Fully Redundant
MAZU is engineered to operate safely and efficiently in deep water, offering both dynamic positioning and 8-point mooring capability, ensuring maximum operational flexibility across a wide range of offshore projects.
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Core Capabilities
Deep-Water Diving & Saturation Operations
MAZU is equipped with a complete saturation diving system supporting:
• Up to 16 saturation divers
• Operational diving depth of 450 meters
• Dual SDC diving bells
• Dedicated Diving Control Center (DCC)
• Integrated hyperbaric rescue boat
This configuration makes MAZU ideally suited for deep-water IRM, subsea construction, pipeline work, and field life-extension projects.
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Dynamic Positioning & Station Keeping
• KONGSBERG SDP 521 fully redundant DP system
• 4 azimuth thrusters (2.4 MW each)
• 2 fixed thrusters (1.5 MW each)
• DGPS, HIPAP acoustic positioning, laser reference systems
• Optional 8-point anchoring system with automated monitoring
This ensures high-precision station keeping, even during sensitive diving and lifting operations.
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Heavy Lifting & Construction Support
• Main Crane: 115–150 tons (Liebherr)
• Auxiliary Crane: 50 tons (Liebherr)
• Rig Runway: Telescopic hydraulic aluminum runway (29.5 m)
• DP Deck Load Capacity: 70 tons
These features allow MAZU to support offshore construction, module handling, equipment transfers, and platform interface operations.
Accommodation & Offshore Living
MAZU offers exceptional accommodation capacity, making it ideal for large offshore campaigns:
• Total Capacity: 442 personnel
• 124 cabins across three accommodation levels
• Dining facilities for 200 people
• Medical center and hospital
• Conference & training rooms
• Cinema, gyms, recreation areas
• Fully air-conditioned living and working spaces
This allows operators to centralize offshore teams on a single platform, reducing logistics complexity and cost.
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Safety, Environmental & Compliance
Firefighting & Emergency Systems
• FiFi Class II firefighting system
• Multiple high-capacity monitors
• Hyperbaric rescue boat
• 8 lifeboats + 23 life rafts
• Fully compliant with IMO and MARPOL standards
Environmental Protection
• Oily water separation systems
• Waste incineration and treatment
• Sewage and food waste processing systems
• Environmentally compliant operations for sensitive offshore regions
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Maintenance & Asset Integrity
MAZU has undergone extensive lifecycle maintenance, including:
• Major overhaul in Halifax, Canada (2007–2010)
• Full overhaul of main machinery (2014)
• Subsea pontoon inspections (2019 & 2023)
• Non-destructive testing of critical structures and life-saving equipment
This ensures the vessel remains structurally sound, compliant, and operationally reliable.
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Ideal Applications
MAZU is ideally suited for:
• Deep-water saturation diving campaigns
• Offshore construction & installation support
• IRM and subsea maintenance
• Platform life-extension projects
• Offshore field development support
• Decommissioning preparation & execution
