Dynamic positioning System
Dynamic positioning Offshore support vessel Toisa Perseus with, in the background, the fifth-generation deepwater drillship Discoverer Enterprise , over the Thunder Horse Oil Field. Both are equipped with DP systems. Dynamic positioning (DP) is a computer-controlled system to automatically maintain a vessel 's position and heading by using its own propellers and thrusters. Position reference sensors, combined with wind sensors, motion sensors andgyrocompasses, provide information to the computer pertaining to the vessel's position and the magnitude and direction of environmental forces affecting its position. Examples of vessel types that employ DP include, but are not limited to, ships andsemi-submersible mobile offshore drilling units (MODU), oceanographic research vessels and cruise ships. The computer program contains a mathematical model of the vessel that includes information pertaining to the wind and current drag o...