Skip to main content

Tanker Spills Prevention by Design (1991) / Chapter Skim
Currently Skimming:

Appendix C: Large Tanker Structural Survey Experience
Pages 215-217

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 215...
... Heavy accumulations of wax, sludge, sediment, and scale have to be removed to expose bare steel for inspection and to ensure that structure can be climbed safely. The efficiency of this operation is dependent on the type and amount of tank cleaning equipment, its level of maintenance, and the previous services of the vessel (length of voyage, time spent in floating storage, and the type of crude oil carried)
From page 216...
... The first tank structure inspected is normally the bottom plating and adjoining structure in the tanks that the chief officer requires to be immediately available for minimal ballast movement. These tanks then are ballasted and bottom structure in remaining tanks is inspected.
From page 217...
... As a result, the deckhead is inspected visually from the highest practical water level, or upper walkways (if fittedJ and ultrasonic readings are taken from the main deck of the plating and of any deck longitudinals available through deck openings. Although tank cleanliness has been the major factor limiting the effectiveness of the surveys, other factors have been pertinent.


This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More information on Chapter Skim is available.