What is one disadvantage of a ship using its DP system compared to being anchored?

Choosing the option about continually running thrusters being hazards for divers and ROVs highlights an important aspect of DP operations. When a vessel is dynamically positioned, its thrusters are actively adjusting to maintain the desired position. This continuous operation poses a risk to divers working in close proximity to the vessel, as the thruster wash can displace water and create hazardous conditions. Additionally, remotely operated vehicles (ROVs) can also be adversely affected by the thruster jets, potentially leading to malfunctions or control issues.

While there are indeed increased fuel costs associated with using a DP system compared to being anchored, the specifics of safety for personnel in the water present a more direct operational disadvantage. The presence of working thrusters creates an environment that can be dangerous for divers, highlighting the need for careful management and safety protocols during DP operations.

In summary, while various operational challenges exist in both DP and anchored scenarios, the immediate hazards to personnel in the water make the risk posed by continuously running thrusters a significant concern in DP operations.