|
|
When the water depth is increased to a level which makes it technically not feasible or commercially unattractive to install a mooring system (for instance when a semi sub is being deployed temporarily) the position of the vessel can be maintained by dynamic positioning. In this case the motion of the semi sub is controlled by thrusters. The biggest advantages of this way of station keeping are that it is independent of water depth and there are no installation costs at the location. Disadvantages are that the operating costs will be high, because of the fuel consumption. Furthermore the procurement costs of the system are high and the required maintenance of the system is high. This results in the fact that dynamic positioning is only used for temporarily moored semi subs.
Figure 2.3: Dynamically positioned Semi-submersible |
Send mail to
m.h.p.bijl@student.tudelft.nl with
questions or comments about this web site.
|