Lloyd’s Register
Marine
Working together
for a safer world
Thickness measurement and close-up survey guidance
January 2023 Ver.7.6
Thickness Measurement And Close‐Up Survey Guidance
Contents
Part
1
Thickness Measurement Process
Chapter 1
Introduction
Chapter 2
Survey Planning
Chapter 3
Preparation of Spaces
Chapter 4
Thickness Measurement and Close-up Surveys
Chapter 5
Permissible Diminution
Chapter 6
Additional Assessments
Chapter 7
TM Reporting
Part
2
Special Survey Requirements:
Other Ship Types & General Dry Cargo Ships
Part
3
Special Survey Requirements:
Bulk Carriers
Part
4
Special Survey Requirements:
Oil Tankers, Ore/Oil Ships, Ore/Bulk/Oil Ships
Part
5
Special Survey Requirements:
Chemical Tankers
Part
6
Special Survey Requirements:
Ships For Liquefied Gases
Part
7
Annual And Intermediate Survey Requirements
Part
8
Assessment Of Protective Coatings In Ballast Tanks :
All Ships
2
Thickness Measurement And Close‐Up Survey Guidance
Contents
Appendix
1
Opening Meeting Form
Appendix
2
Thickness Measurement Report Forms
Appendix
3
Guidance On Thickness Measurement For Transverse Sections And The
Evaluation Of Longitudinal Strength Of Hull Girders For All Ships
(Including Oil Tankers Greater Than 130m In Length)
Appendix
4
Guidance On Thickness Measurement Of Cargo Hold Shell
Frames On Single Skin Bulk Carriers Contracted For Construction Prior
To 1 July 1998
Appendix
5
Approval Of Thickness Measurement Companies
Appendix
6
Guidance Notes For Evaluation Of Scantlings Of Corrugated Transverse
Watertight Bulkheads In Bulk Carriers Contracted For Construction On
Or After 1 July 1998
Appendix
7
Guidance Notes For Evaluation Of Scantlings Of Hatch Covers & Hatch
Coamings Of Cargo Holds Of Bulk Carriers Contracted For Construction
On Or After 1 July 1998 & Bulk Carriers, Ore Carriers And Combination
Carriers Contracted For Construction On Or After 1 January 2004. Also
All Remaining Ships Contracted For Construction On Or After 1 July 2012.
Appendix
8
Guidelines For The Gauging / Renewal / Reinforcement Of The Vertically
Corrugated Transverse Watertight Bulkhead Between Holds Nos. 1 And
2 In Accordance To UR S19.
Appendix
9
CAP TM Jobs Argonaut User Guide
Appendix
10
Residual Deck Buckling in Argonaut
Appendix
11
Requirements for Service Suppliers Engaged in Surveys using Remote
Inspection Techniques (RIT) as an Alternative Means for Close-up
Survey of the Structure of Ships and Mobile Offshore Units
3
Lloyd’s Register
Marine
For further information, contact your local Lloyd’s Register group office.
For all other Thickness Measurement guidance and information about our services go to:
www.lr.org/tm
www.lr.org
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