Subsea Metrology

Subsea services

We deliver precision subsea metrology using ROV-based laser systems and acoustic positioning for spool piece measurement, manifold alignment, and turbine positioning. Our exacting approach ensures perfect fitment and eliminates costly interface errors in complex subsea installations.

From Flange Geometry to FirstTimeFit

Our metrology services convert the complex three-dimensional spatial relationships between hubs, flanges, pipeline terminations, manifolds, riser bases, and production templates into precise, traceable engineering measurements — quantifying range, depth, heading, and attitude between connection points with the accuracy that confident spool piece and jumper fabrication demands.

Every metrology dataset we produce feeds directly and traceably into spool and jumper design, dimensional verification, clash checking, and fabrication sign-off — creating an unbroken, auditable link between actual seabed geometry and the onshore manufacturing process. In a discipline where a single failed tie-in can cost more than the entire survey programme, our metrology services are not a cost — they are the most reliable insurance an installation project can carry.

How We Measure the Subsea Geometry

Acoustic LBL & INS Metrology

Long baseline acoustic arrays and instrumented transponders are deployed around hubs and flanges to measure precise ranges and depth differences between connection points. INS and depth sensors mounted on ROVs or dedicated frames provide heading and attitude, allowing the full 3D relationship between structures to be solved within a robust error budget.

Photogrammetry & Subsea Laser Scanning

Highresolution stills and video are acquired along programmed passes, then processed using photogrammetry to create detailed 3D models of hubs, guide bases, and surrounding structures. Where higher accuracy or rapid turnaround is required, dynamic subsea laser scanning generates dense point clouds that capture flange faces, bolt patterns, and misalignments in a single pass.

Collaborative Planning with Engineering & Fabrication

Metrology campaigns are planned handinhand with pipeline, structural, and fabrication engineers so that offshore measurements match exactly what design teams and workshops need. Survey and engineering teams jointly define measurement points, brackets, tolerances, and accuracy classes in line with guidance such as IMCA S019, including statistical confidence requirements for each tiein.

Integrated Metrology Workflows & QA

Acoustic, inertial, photogrammetric, and laser measurements are tied to common control points and analysed using metrology software that solves for relative offsets, rotations, and uncertainties. Dedicated QA processes—instrument calibrations, redundancy, repeat measurements, and statistical confidence analysis—ensure the resulting measurements are defensible for fabrication and installation tolerances.

What We Deliver: FabricationReady Geometry

HighAccuracy HubtoHub Solutions

Complete 3D solutions (x, y, z, heading, pitch, roll) between defined measurement points on hubs, flanges, and structures, with documented accuracy and confidence levels. These form the primary input to spool and jumper design, ensuring components are dimensioned to real seabed geometry rather than nominal drawings.

Point Clouds, Models & ISO Drawings

Registered point clouds and surface models of tiein areas derived from photogrammetry and laser scanning, from which detailed CAD geometry and ISO drawings of connection points are produced. This supports clash checks, interface management, and visualisation of tight clearances in engineering and digital twin environments.

Metrology Reports & Error Budgets

Formal metrology reports describing methods, equipment, calibration results, raw and processed data, and comprehensive error budgets in line with industry guidance such as IMCA S019. These documents demonstrate due diligence and provide the traceability engineers need when using the results for critical tiein design.

Design, Fabrication & InstallationReady Exports

Data packages delivered in formats compatible with spool/jumper design tools, structural analysis software, and fabrication systems, including coordinate lists, transformation parameters, and CAD exchange files. This shortens the path from offshore measurement to workshop fabrication and offshore installation, supporting firsttimefit outcomes and minimising vessel time.

Industries We Serve

Oil, Gas & Renewables

Ports & Harbours

Coastal Engineering & Climate Resilience

Dredging & Marine Construction

Marine Infrastructure

Bridge Pier Scour Assessment | Causeway Alignment Surveys | Submerged Asset Inspection | Intake/Outfall Mapping | Quay Wall Condition Assessment

Water Resources & Inland Hydraulics

Reservoir & Dam Surveys | River Cross-Sections | Floodplain Bathymetry | Sedimentation Studies | Hydrodynamic Model Inputs

Marine Mining

Seabed Mineral Exploration | Deep‑Ocean Resource Mapping | AUV Survey | Multiphysics Targeting | Environmental Baseline

Environmental Management

Defence & Security

Seabed Clearance | UXO Pre-Characterization | Submerged Obstruction Detection | Underwater Infrastructure Mapping | Risk & Vulnerability Assessment

Our Methodology: Precision at Every Stage

A proven four-stage process ensuring accuracy, compliance, and actionable insights

Plan with Intelligence

Before mobilizing, we begin with a data-driven understanding of your asset environment. We perform a comprehensive site intelligence review — analyzing existing drawings, access limitations, hazardous zones, operational constraints, and required accuracy levels.

Precision Field Acquisition with real time QC

Our field teams deploy fully calibrated instruments in strict accordance with manufacturer specifications and project QA protocols. Intelligent workflows deliver real-time on-site feedback on coverage, registration integrity, and data quality

AI-Driven Data Processing & Extraction

Curates raw data, Guides AI, Validates Output into actionable digital intelligence through a hybrid pipeline of advanced algorithms, machine learning models, and expert review.

Decision-Ready Deliverables

Outputs are not merely models but enterprise-ready information assets. All datasets undergo independent quality assurance audits. We ensure your organization can immediately operationalize the data for planning, maintenance, and strategic decision-making.

Case Studies

We're building a greener tomorrow. Our solutions optimize operations, cut waste, and lower emissions, supporting net-zero goals.

Subsea services

Subsea Geophysical Services

Advanced nearshore pipeline mapping using integrated geophysical technologies to determine precise burial status and mitigate environmental risks. Our comprehensive survey delivers the critical data needed…

200m

Survey Corridor Width

100%

Data Compliance

Zero

Environmental Incidents

Subsea services

Precision Positioning & Metrology

Millimeter-accurate jacket positioning using robotic total stations and high-precision leveling to ensure perfect fit-up between new and existing structures. Our exacting survey methodology delivered flawless…

±2mm

Positioning Accurac

100%

Fit-Up Accuracy

Zero

Safety Incidents

Why Organizations Choose Our Subsea Metrology Services

Technical Excellence

Industry-leading accuracy specifications (±1–2 mm TLS, ±2–5 cm aerial) backed by systematic, documented QA/QC processes ensuring reliable, repeatable results across diverse project types — from offshore platforms in extreme marine environments to sensitive heritage interiors.

Operational Efficiency

Multi-platform deployment and AI-accelerated processing compress project timelines by up to 70%. What once required months of manual survey and CAD drafting now delivers registered, classified point clouds and intelligent models in days to weeks.

Integrated Solutions

Complete service delivery from project planning and field acquisition through processing, modeling, and specialized analysis — all under one roof. No fragmented vendor chains, no data conversion losses, no accountability gaps.

Industry Expertise

25+ years of specialized knowledge across regulated, high-stakes environments. We don’t just capture geometry — we understand what it means for your operations, your compliance obligations, and your capital planning decisions.

Proven ROI

Our clients consistently document measurable returns: 30–50% reduction in field rework, 20–40% faster project delivery, elimination of fabrication mismatches, and extended asset service life through predictive condition monitoring. Reality capture isn’t an expense — it’s a multiplier on every downstream decision.

The Subsea Intelligence Advantage

At the intersection of marine survey rigour and advanced digital workflows, we transform raw acoustic and optical signals into validated, fully integrated subsea models that engineering, dredging, and operations teams can interrogate, trust, and act on from day one.