9 Identification of areas and sections for thickness measurements
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Statutory Documents - IMO Publications and Documents - Resolutions - Marine Environment Protection Committee - Resolution MEPC.94(46) - Condition Assessment Scheme - (adopted on 27 April 2001) - Annex - Condition Assessment Scheme - Appendix 3 - Model Survey Plan for CAS - 9 Identification of areas and sections for thickness measurements

9 Identification of areas and sections for thickness measurements

  The CAS requirements

 Paragraph 7.3.3 (and Table 7.3.3) of the CAS specify the minimum requirements for thickness measurements for CAS survey. These are as follows:

Thickness measurement requirements
1. Within the cargo area
  • .1 Each deck plate
  • .2 Three transverse sections
  • .3 Each bottom plate
2. Measurements of structural members subject to close-up survey according to table above (for close up survey), for general assessment and recording of corrosion pattern
3. Suspect areas
4. Selected wind and water strakes outside the cargo area
5. All wind and water strakes outside the cargo area
6. Internal structure in the fore and aft peak tanks
7. All exposed main deck tanks outside the cargo area and all exposed first tier superstructure deck plates
Guidance notes:
1 The attending surveyor(s) may increase the extent of thickness measurements as deemed necessary (see paragraph 7.3.5 of the CAS).
2 Transverse sections for thickness measurements shall be chosen where the largest material reductions are expected to occur or are revealed from deck plating measurements (see section 7.3.8 of the CAS).
3 Where substantial corrosion is found, the extent of thickness measurements shall be increased accordingly (see paragraph 7.3.4 of the CAS).

 In addition paragraphs 7.3.4 to 7.3.8 of the CAS provide further guidance on the extent and increase of the thickness measurements to be taken.

  The Plan

 This section of the Plan shall identify and list, using paragraph 7.3.3 (and Table 7.3.3) of the CAS, the areas and sections where thickness measurements shall be taken.

Parent topic: Appendix 3 - Model Survey Plan for CAS
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