S475-93

1.1 This Standard sets forth requirements and guidance pertaining to the various sea operations that are involved with fixed offshore structures. As sea operations are complex activities unique to each application, these requirements should be reviewed for each application to ensure that the particular circumstances are adequately addressed. Notes: (1) This Standard addresses four structure types (Concrete Gravity Base, Steel Jacket, Jack-Up, and Arctic) and is arranged according to structure type with a section devoted to each one. Table 4.1 illustrates the setup of the sections and the cross-referencing among them. Arctic structures, addressed in Clause 8 are not a distinct structure type, in the same sense as the other three. Sea operation aspects of many Arctic structures, such as the fill-retention structures addressed in CAN/CSA-S472, are similar to those for concrete gravity bases. (2) The Standard does not provide precise requirements applicable to all sea operations. It is meant to provide users involved in such operations with guidance on aspects to be considered, and establishes minimum requirements for routine operations. (3) No code of practice can substitute for good plaaning and the use of knowledgeable, competent personnel. Sea operations with fixed offshore structures can involve large numbers of people and equipment operating in concert to achieve a specific goal. A prime consideration of any well-planned operation is to ensure the safety of personnel and equipment. This Standard does not diminish the responsibility of all personnel to consider and plan for all reasonably foreseeable problems.