A Development of a Docking Aid and Tightening System for FSRUs and LNGCs

摘要

An onshore receiving terminal provides precise docking informationto the pilot by detecting distance, speed, and angle of docking LNGCusing the laser or ultrasonic distance measuring device installed tofixed mooring facility. However, FSRU is on the status that mooringfacility is moved to floating LNG terminal which is installed to the seebedby the influence of weather conditions such as sea wind and oceancurrent, and therefore, it is hard to use existing distance measuringdevice, and a LNGC (Liquefied Natural Gas Carrier) comes alongside aFSRU (Floating Storage Regasification Unit) for off-loading. It iscritical to maintain the tension of the mooring line between FSRU andLNGC, because LNG may be in danger of leakage and possibleexplosion during off-loading. This article aimed to develop docking aidsystem between two vessels fluids such as FSRU and LNGC based ondocking guidance system technology of floating offshore LNGterminal, and a tightening control, monitoring system and algorithmwas developed for the side-by-side mooring. In comparison withprevious systems, they are expected to provide stably docking andcontrol the tension of the mooring line between a FSRU and a LNGC.