Development and Requirement for Submarine Surveys of Longer Routes and Deeper Areas Free

As the installation of submarine Power cables extends into longer and deeper sub marine areas the there is a relevant need to develop the methodology for the survey equipment to follow with continuous high quality data collection in the deeper part. To meet the challenges the acoustic sensors have been put onto steerable vehicles such as ROVs and ROTVS. The extended lengths of the submarine routes also requires increased survey speed to keep the cost down. As the depth makes it difficult for towed equipment to maintain both depth and speed again the solution is to put the survey sensors on ROVs and thus develop the ROV to be able to survey in speeds of 8 knots. This requirement have been existing for some time but for a long time the changes to the standard operation based on day rate operation in the oil and gas industry. Now the sub marine cable industry need the deeper survey operations to be developed to increase speed. In the developed requirements to establish and mitigate any risk of potential UXOs also have required a significant development of methodology and best practice to ensure UXO clearance and removal by detection, confirmation and were needed excavation and confirmation prior to clearance.