- Full 3D scanning, collision analysis, system modeling.
- Prefabrication of spools, custom foundations for filters, UV chamber, control panels.
Engineering and prefabrication
Breaux Tide – BWTS Retrofit
Ballast Water Treatment System (BWTS) Installation
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
Days downtime
Client context
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 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.
BRIEF
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
02
On-Site Mechanical Installation
- Removal of obsolete pipes.
- Installation of BWTS piping and equipment foundations.
- Mechanical installation of the filter, UV chamber, pumps, flowmeters, valves and air piping.
03
On-Site Electrical Installation
- 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
Final Testing and Preparation for Commissioning
- Hydrostatic pressure testing of pipework.
- Air leak testing for pneumatic systems.
- Final visual inspection and delivery of complete installation dossiers.
End of delivery
The outcomes
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.