Precision Below the Surface — Ultrasonic Thickness Measurement (UTM) Services in Scandinavia and Worldwide
Certified underwater diving services delivering accurate Ultrasonic Thickness Measurements (UTM) to ensure hull integrity, safety, and class compliance — without dry-docking.
Underwater Diving Service & Ultrasonic Thickness Measurement (UTM)
When it comes to underwater inspections, precision is everything.
At Delta Marine Scandinavia AB , our certified commercial divers perform Ultrasonic Thickness Measurements (UTM) to determine the exact condition of your vessel’s hull — without the need for dry-docking.
We combine state-of-the-art ultrasonic technology with real-time data collection, giving shipowners and classification societies the information they need to make confident, safe decisions.
Need fast UTM verification in Gothenburg or Copenhagen? Contact our operations team — we can mobilize within hours.
What Is Ultrasonic Thickness Measurement (UTM)?
UTM is a non-destructive testing (NDT) method used to measure the remaining steel thickness of a ship’s hull, tanks, or structures.
Using advanced underwater ultrasonic gauges, our divers transmit high-frequency sound waves through the material — the returning echo reveals exact thickness values within ±0.1 mm accuracy.
This method helps detect corrosion, erosion, or structural thinning early, reducing the risk of hull breaches, leaks, or class non-compliance.
“Every millimeter matters underwater — precision keeps vessels safe, compliant, and operational.”
— Anders Lindström, Lead Dive Supervisor, Delta Marine Sweden
HowDelta Marine Scandinavia AB Performs Underwater UTM
Our process is designed for accuracy, safety, and speed:
- Pre-Dive Planning – Review of vessel drawings and class requirements (DNV, ABS, BV).
- Surface Preparation – Divers clean selected test areas for accurate readings.
- Calibration – UTM gauges calibrated to known thickness standards before each dive.
- Measurement & Data Logging – Real-time readings recorded and verified topside.
- Reporting – Detailed report with UTM charts, location maps, and video stills provided within 24 hours.
All operations are carried out using IMCA-approved diving systems and class-approved UTM instruments (Cygnus, Tritex, or equivalent).
Why Choose Delta Marine Scandinavia AB
- Certified Divers & Inspectors — IMCA, DNV, and ABS approved.
- No Dry-Docking Required — Save time and operational costs.
- Data Precision — ±0.1 mm ultrasonic accuracy.
- Full Scandinavia Coverage — Rapid deployment to Gothenburg, Malmö, Stockholm, Copenhagen, Europe: Spain, Greece , Poland, and of course Worldwide
- 24/7 Emergency Availability — We respond when others can’t.
After UTM inspection, we also offer Underwater Welding & Repairs and Class Inspections for complete vessel maintenance.
Technical Insight — Why UTM Matters
Corrosion is the silent enemy of every vessel.
UTM inspections reveal early signs of metal loss before they become critical.
By maintaining accurate thickness data over time, shipowners can plan repairs strategically and extend the life of their vessels.
UTM reports from Delta Marine Scandinavia AB are accepted by classification societies including DNV, ABS, and Bureau Veritas, and comply with IMO and IACS regulations.
Typical Applications
- Hull and shell plating surveys
- Ballast and cargo tank inspections
- Rudder, skeg, and thruster housing measurements
- Offshore structure and pontoon inspections
- Follow-up surveys after hull cleaning or repair
FAQ
UTM determines the remaining steel thickness of a ship’s hull or structure without removing it from water. It identifies corrosion or thinning areas and ensures compliance with class and safety standards.
Yes. Our divers use underwater-calibrated ultrasonic gauges that provide precise thickness readings even under high pressure and cold-water conditions.
Absolutely. Delta Marine Sweden’s UTM inspections follow procedures approved by DNV, ABS, Bureau Veritas, and other leading class societies.
Our instruments provide measurements with ±0.1 mm accuracy, verified by calibration before each dive.
Most reports are delivered within 24 hours after the dive — including data sheets, photos, and video stills.
Contact Delta Marine Scandinavia AB
Need an underwater ultrasonic thickness measurement or diving inspection for your vessel? Our technical team is ready 24/7. We guarantee fast response, certified results, and zero compromise on safety.
Contact Delta Marine Scandinavia AB Today.