UTM Handbook / Free reference
Find the guidance.
Follow the source.
Start with a question or choose a topic below. Each article keeps its references, conditions and edition notes close to the answer.
Search a topic → Read the explanation → Check the conditions and cited source
Open the guided scope: ClassNK, ABS, DNV or BV
09 published pages
Understand the rules
Find the applicable IACS requirements and understand the survey framework.
- What changes for thickness measurement on CSR ships?
- ESP Code or IACS Z10: which one applies to my ship?
- What does UR Z10.1 require for oil tankers, in plain language?
- What does UR Z10.2 require for bulk carriers, in plain language?
- What does UR Z10.3 require for chemical tankers?
- What does UR Z10.4 require for double-hull oil tankers, in plain language?
- What does UR Z10.5 require for double-skin bulk carriers, in plain language?
- What does UR Z7 add to hull surveys and thickness measurement?
- Which IACS UR covers thickness measurement for my ship type?
08 published pages
Assess thickness & corrosion
Read the conditions behind a limit, with its cited source.
- At what thickness must steel be renewed on a CSR ship?
- What are the permissible diminution limits for bulk carriers, class by class?
- What are the permissible diminution limits for general dry cargo ships?
- What are the permissible diminution limits for oil tankers, class by class?
- How do I read a class thickness limit?
- What are the pitting acceptance criteria in each class?
- What counts as substantial corrosion in each class?
- What wastage allowances apply to ships under 90 m?
01 published pages
Plan the measurements
Published guidance on recording thickness measurements.
06 published pages
Compare class requirements
Reference comparisons. These are not the automatic report-export feature.
From reference to fieldwork
Ready to mark the drawing?
Read the edition and applicability notes in each source. The current rules of the attending class society govern.