Surveys required before rig move - Offshore Hydrographic Surveys
When moving into a new location the following hydrographic surveys are required:
- sidescan sonar
- water depth
- soil analysis.
These surveys are by arranged by the marine supervisor upon the Operations Engineer’s request and are carried out prior to moving a rig onto a new location, or siting a jacket.
An acceptable grid definition must be provided for example surveys over 1km2 lines of 1 000 m each (9 in each direction . . .