دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: any system or method by which surveillance is maintained on the position of a floating offshore drilling rig in relation to the subsea well-head when the rig is dynamically positioned. The rig should always be directly over the wellhead to minimize wear on subsea equipment and to facilitate operations involved with the equipment. See acoustic position reference. tau/line positionreference system.