Services
Structural & Systems Engineering Electrical Engineering Consultancy & Project Management Procurement & Logistics Installation & Commissioning Riding Crews & Operational Maintenance Reactivation & Decommissioning
Solutions
Environmental Compliance Decarbonisation Retrofits Conversions & Mobilisations Energy Efficiency & Optimization Structural & Mechanical Upgrades
Case studies
About
News
Get in touch
GLO Marine Careers Contact us Privacy Policy Cookies Policy
Icon Get in touch
Retrofits

Breaux Tide – BWTS Retrofit

Client Tidewater
Year 2025
Vessel type
 Multi-purpose vessel 
Class
 ABS Class
SOW
 Turnkey engineering, prefabrication support, mechanical and electrical installation
20
installation days
6
team members
0
downtime days
CLIENT CONTEXT
BWTS compliance for Breaux Tide
Tidewater, one of the world’s largest offshore vessel operators, required their vessels to comply with the IMO D-2 and USCG ballast water discharge standards. The Breaux Tide was scheduled for BWTS retrofitting during a limited dry-dock window at Bollinger Shipyard, USA, in March 2025. Maintaining Tidewater’s fleet readiness while ensuring full regulatory compliance was critical.
THE CHALLENGE
Tight space and time constraints
Tight space constraints: Integrating the BWTS system into the cargo room with minimal disruption. Dry-dock time pressure: Completing a complex installation within a strict three-week timeframe. Mechanical and electrical complexity: Managing a multidisciplinary scope within a confined area and coordinating multiple subcontractors safely.
THE WORK TO BE DONE
Project phases
Develop the full engineering package, including 3D scans, collision checks, system layout, spool fabrication drawings, and foundations.  Prefabricate critical spools and supports.  Supervise mechanical and piping installation, including removal of old systems.  Manage the full electrical installation, cabling, and panel setup.  Conduct functional testing and deliver the project ready for commissioning. 
PROJECT SOLUTION
Implementation steps
01.

Engineering and prefabrication

Full 3D scanning, collision analysis, system modeling.  Prefabrication of spools, custom foundations for filters, UV chamber, control panels. 
02.

Removal of obsolete pipes.   Installation of BWTS piping and equipment foundations.   Mechanical installation of the filter, UV chamber, pumps, flowmeters, valvesand air piping.  
03.

Mounting and connection of electrical cabinets.  Routing and connection of high-voltage cables and instrumentation (UV sensors, flowmeters, transmitters).  Installation / connection of control systems and valve actuators. 
04.

Hydrostatic pressure testing of pipework.  Air leak testing for pneumatic systems.  Final visual inspection and delivery of complete installation dossiers. 
END OF DELIVERY
The outcome
Final results
  • Retrofit completed within 20 days, without any dry-docking extension. 
  • 100% compliance with ABS class and IMO D-2/USCG BWTS discharge standards. 
  • Zero Lost Time Incidents (LTIs) recorded during the project. 
  • Immediate readiness for commissioning with no outstanding corrective actions. 

Through this project,GLO Marine successfully delivered a complete BWTS installation turnkey solution— from detailed engineering and prefabrication, to mechanical and electrical installation, to project supervision, testing, and full client handover. Our ability to offer a single-point-of-contact EPCI service  allowed Tidewater to benefit from faster execution, minimized vessel downtime, and a fully compliant retrofit process ready for final commissioning.This project reinforces GLO Marine’s role as a trusted strategic partner for large-scale, multi-vessel retrofit programs across the offshore energy sector.

Work with us
Contact our retrofit specialist for details
inquiries@glo-marine.com +40790870949
More Work
Related case studies
Retrofits
Doenicke Tide BWTS Retrofit for IMO Regulations Compliance
 View case study
Retrofits
Fully automated Ballast Water system for unmanned offshore platform
View case study
Retrofits
Marine hydraulic system upgrade for FPSO
 View case study