Ultrasonic Thickness Measurements (UTM) are a non-destructive testing methodused to determine the thickness of steel structures on vessels. Using high-frequency sound waves, a specialist gauge measures how much material remains in critical areas such as hull plating, decks, tanks, and structural members.
This allows shipowners, operators, and insurers to understand the true condition of a vessel without causing any damage or disruption.


Celtic Maritime provides comprehensive UTM surveys across Wales and the wider UK, including:
All measurements are taken using calibrated, industry-approved ultrasonic equipment, ensuring accurate and repeatable results.
Following a survey, you will receive a clear, professional report including:
Thickness readings mapped across key areas
Identification of corrosion or wastage trends
Highlighted critical areas requiring attention
Recommendations for repair or continued monitoring
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