A METHOD OF LAYING A PIPELINE ON A SEAFLOOR, MONITORING SURROUNDING ZONES OF THE INSTALLED PIPELINE FOR APPROACHING VESSELS AND WARNING VESSELS CONSIDERED TO BE ABLE TO CAUSE HARM TO THE PIPELINE

摘要

It is described a method of laying a pipeline (1) on a seafloor (2), wherein the method comprises the steps of: - bringing the pipeline to an offshore location using a vessel, - laying the pipeline on the seafloor using the vessel, - defining a first zone (10) surrounding at least a first part length (1') of the pipeline when laid subsea, wherein the first part length is uncovered, - defining a second zone (20) extending from the first zone, - monitoring the second zone for vessels approaching the first zone, - analysing vessels detected during said monitoring of the second zone, for the purpose of determining whether the vessels can cause harm to the first part length of the pipeline, - for each vessel monitored in the second zone and considered to be able to cause harm to the first part length of the pipeline, informing the vessel about the first zone and/or requesting the vessel not to enter into the first zone.