MoorSafe – Mooring Line Integrity Monitoring
Real-time visibility of mooring line angle and presence for FPSOs and floating units.
Measure. Analyze. Act.
MoorSafe is Holdstein’s mooring line integrity solution. It uses high-resolution digital subsea inclinometers and a topside module to track the angle and presence of each line in real time. The system helps operators detect abnormal behavior early, reduce blind spots and support safer offshore operations.
What is MoorSafe?
How MoorSafe works
Subsea sensing
Digital triaxial inclinometers are installed along the mooring lines to measure tilt with high resolution, regardless of catenary configuration or water depth. The subsea units are designed for diver installation and can be deployed while the unit is in operation.
Topside module & communications
On the surface, MoorSafe uses an industrial-grade electronic module that collects data from the subsea sensors and transmits it to the control station. Depending on the project, communications can be implemented via satellite, radio or Ethernet.
Data, alarms and history
Where MoorSafe is used
Monobuoy
MoorSafe monitors the angle and presence of each line on monobuoys and SPMs. Data is typically transmitted from the buoy to the onshore or offshore control room via satellite.
FPSO with turret
On turret-moored FPSOs, MoorSafe tracks mooring line behavior around the turret. Data is usually brought to the control room via radio link or other wireless communications.
Semi-submersible
On semi-submersible units, MoorSafe monitors line angles and behavior using an Ethernet or other suitable network, providing the control room with continuous mooring integrity information.
Taut-leg and other types
For taut-leg and other mooring configurations, MoorSafe accurately measures small angle variations that indicate changes in line loading or stiffness. The system supports alarm limits, event detection and long-term history for each line.
Benefits of MoorSafe
Early detection for safer operations
MoorSafe increases safety for FPSOs and floating units by identifying early signs of instability, loss of tension, or unexpected line motion—giving operations time to respond.
High-resolution angle data for failure signatures
Accurate angle tracking supports detection of line failure signatures, progressive loss of tension, sudden shifts in line behavior, and other abnormal events that are difficult to confirm with periodic checks.
Modular subsea system, installable without stopping production
The modular subsea architecture enables diver installation while the unit remains in production—minimizing operational disruption and simplifying implementation planning.
Integrated with SAMS for a broader monitoring strategy
MoorSafe integrates with the SAMS platform so mooring integrity data can be managed alongside other critical monitoring streams—enabling a unified approach to offshore asset performance and risk.
Fewer routine ROV campaigns, smarter inspections
With real-time visibility, MoorSafe helps reduce reliance on routine ROV campaigns and supports targeted inspections only when the data indicates changes or elevated risk.
Historical data for fatigue, verification, and future designs
MoorSafe stores historical datasets that can support fatigue assessments, design verification, correlation with metocean events, and better-informed decisions for future mooring projects.
Industrial-grade topside electronics for harsh offshore conditions
Industrial-grade electronics are designed for harsh conditions such as corrosion, vibration, humidity, and temperature variation—supporting stable long-term operation with minimal intervention.
