Dynamic Positioning

Dynamic positioning automatically maintains a vessel’s position and heading using thrusters under closed-loop control, fed by position references such as DGNSS, taut-wire, acoustic, and laser systems plus gyro, wind, and motion sensors. IMO MSC.1/Circ.1580 and class notations grade redundancy as DP1, DP2, and DP3, where DP2 and DP3 keep position after any single fault. Offshore supply vessels, drillships, cable layers, dive support vessels, and shuttle tankers rely on it for station keeping near installations. Capability plots and footprint analysis define the environmental envelope in which position can be held.