Resumen de Risk Assessment of Fishing Trawl Activities To Subsea Pipelines Of Sabah And Labuan Waters
Ahmad Faizal, Mohd Hafizi Said, Khalid Samo, Mohd Hairil, Ismail Zainol
Trawling is a method of catching fish in a large volume where fish nets are pulled through water usingone or two boats. Bottom trawling is where the nets are pulled over on the seabed. The gear of thebottom trawling would impact the exposed subsea pipeline, on the seabed. Subsea pipelines transportcrude oil and gas from the offshore platform to shore facility. This study assesses the risk of fish trawlingactivities to the subsea pipelines at Sabah and Labuan offshore. The specification of trawl equipmentused by local trawlers in Sabah was determined by onsite survey. The frequency of fish trawler crossingover the pipelines was calculated based interview on operation and site survey. The calculation of pull-over load of otter board was calculated using the DNVGL algorithm. The severity and frequency indexof the risk matrix was developed based on literature review. Results showed that the pull-over load ofotter board would not damage the pipelines. The risk posed by fish trawler activity to the pipelines islow and moderate.
