Section 4 Intermediate Surveys - Structural and machinery requirements

4.1.1 Whenever practicable, Intermediate Surveys are to be held concurrently with statutory annual or other relevant statutory surveys, where these exist.

4.2.1 The requirements of Pt 1, Ch 3, 2 Annual Surveys - Structural and machinery are to be complied with where appropriate.

4.2.2 A General Examination of salt-water ballast and buoyancy tanks is to be carried out as required by Pt 1, Ch 3, 4.2 Intermediate Surveys 4.2.4and Pt 1, Ch 3, 4.2 Intermediate Surveys 4.2.5. If such examinations reveal no visible structural defects then the examination may be limited to a verification that the protective coating remains in GOOD or FAIR condition as defined in Pt 1, Ch 3, 1.4 Definitions 1.4.8. When considered necessary by the Surveyor thickness measurement of the structure is to be carried out.

4.2.3 For salt-water ballast and buoyancy tanks, where a protective coating is found to be in POOR condition, as defined in Pt 1, Ch 3, 1.4 Definitions 1.4.8, where a soft coating has been applied or where no protective coating has been applied from the time of construction, maintenance of class will be subject to the spaces in question being internally examined and gauged as necessary at Annual Surveys.

4.2.4 For all linkspans over five years of age and up to 10 years of age, representative salt-water ballast and buoyancy tanks are to be examined. For tanks, where a protective coating is found in POOR condition, as defined in Pt 1, Ch 3, 1.4 Definitions 1.4.8, or other defects are found, where a soft coating has been applied or where a protective coating was not applied from the time of construction, the examination is to be extended to other ballast tanks of the same type.

4.2.5 For all linkspans over 10 years of age, all salt-water ballast and buoyancy tanks are to be examined.

4.2.6 The Surveyor is to carry out a survey and thickness measurements of any structure identified at the previous Special Survey as having substantial corrosion.