dynamic positioning

Estimation of DP Power requirements

The calculation of the required power to maintain a vessel keeping a fixed position with the aid of a Dynamic Positioning (DP) system is not easy. Wind, waves and current forces should be analyzed together with the propulsion configuration of the vessel. But some rough estimation could be done easily with the HSSC number as explained here below.

Voith Schneider Propeller

The Voith Schneider Propeller (VSP), also known as a cycloidal drive (CD) is a specialized marine propulsion system (MPS). It is highly maneuverable, being able to change the direction of its thrust almost instantaneously. It is widely used on tugs and ferries; but in recent years, it has also been used in offshore vessels, like Platform Supply Vessels, or even in Offshore Accommodation Vessels.

Dynamic Positioning System vs Mooring System

One of the main disadvantages of dynamic positioning systems when compared to mooring systems, is the fuel costs incurred in operation. But it is necessary to quantify that difference in order to make an informed choice between the two possibilities: mooring or dynamic positioning.