What does the DARPS Position Reference System allow a shuttle-tanker to do?

The DARPS (Dynamic Adaptive Reference Positioning System) Position Reference System is specifically designed to enhance a vessel's positioning capabilities by allowing it to maintain its position relative to a moving point. This is especially critical for shuttle-tankers operating in dynamic environments, such as when transferring cargo to or from mobile offshore installations. The system utilizes various sensors and algorithms to continuously adjust the position reference as the point it is maintaining position relative to moves, ensuring precision and reliability in dynamic situations.

In this context, the ability to keep a shuttle-tanker positioned relative to a moving platform, such as a production unit that may drift due to currents or wind, is essential for safe and effective operations. This capability helps in smooth transfer processes, minimizes the risk of collisions, and enhances operational efficiency on the water.

The other choices, while related to positioning and navigation, do not accurately capture the primary function of the DARPS system in the context of shuttle-tankers. Static references and the ability to operate without external assistance do not align with the primary purpose of maintaining relative position to a moving target, which is the real advantage provided by the DARPS system.