IMCA Releases New Guidance
Selecting the right satellite positioning system for offshore applications is of vital importance, which is why the IMCA has published new guidance on the topic, warning that in recent years lower priority has been given to system selection than is wise, particularly in respect of dynamic positioning (DP), and explaining that the use of inappropriate systems has led to delays in project execution, vessel downtime and, in some circumstances, damage to assets.
In the introduction to ‘Guidance on the Selection of Satellite Positioning Systems for Offshore Applications’ (IMCA S 018) the association explains that the costs incurred during any of these incidents have significantly outweighed the procurement of a suitable system from the outset.
“It is critical from both operational and safety perspectives that there is an understanding of the key criteria to be considered during the selection process,” explains IMCA’s Technical Director, Jane Bugler. “These include available global navigation satellite system (GNSS), vessel class requirements, vessel activities, performance expectations, regional variations in atmospheric conditions, and contractual obligations.” Looking back over the history behind current uses she adds: “GNSS technology has been used as a surface positioning system for approximately twenty years. Typical applications have included positioning of top-side assets, fixed installations and subsea structures.